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Kevin:
Today on "This Old House"...

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Richard: To heat and cool
this mid-century modern...

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Ross: We tapped into
the Earth's energy.

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Kevin:
Then we'll reveal what makes

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these kitchen
appliances accessible.

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Charlie: And it's judgment day.

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Let's see if all the hard work
we put into this house

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to make it
energy-efficient pays off.

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♪♪

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Man: Ahh. That's it.

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♪♪

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♪♪

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♪♪

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Kevin:
Hey there. I'm Kevin O'Connor,

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and welcome back
to "This Old House"

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and to our project here
in Lexington, Massachusetts.

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where, believe it or not,

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we are just a couple of weeks
away from completion.

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Outside, you can see Jenn's
landscape design coming together

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with the plantings in.

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The outdoor kitchen
has been installed as well.

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We're just waiting for
a stone countertop right there.

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And check out
the massive bluestone patio.

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Most of the stone is down,
except for in this corner.

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The tent is keeping
it warm enough

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so that the guys can grout
the last couple pieces.

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And also there will be a fire
pit in that corner right there.

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Now, there were
a lot of reasons

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to renovate this old
mid-century modern,

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but first and foremost
was to make the home

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accessible for the family's
middle son.

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He was diagnosed with Duchenne
muscular dystrophy.

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And we know in about
a year's time

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he's probably going to be
in a wheelchair.

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So accessibility is key,
but also anything that we can do

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to improve his quality of life,

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well, we're trying
to do that too.

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So we've got this therapy pool
right here,

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which is a nice touch.
Hey, Charlie. Hey, Billy.

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Charlie: Hey, Kevin.
Kevin: And with the therapy pool

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a lift, right?
Charlie: Yeah, this is

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a pool lift that will help
anybody in the house,

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but most likely Billy to get
Caffrey in and out of the pool.

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Kevin: Gotcha.
Charlie: And it's a portable one

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so you just pull out the plug

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and drop the pin
right down into the sleeve.

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And now just really
getting Billy used to using it.

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Kevin: So once that goes in,
arm comes up?

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Charlie: Arm comes up,
which you'll give us about

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a four-foot reach into the pool.

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And we're still waiting for
the chair actually to get here.

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But looks like it's
pretty simple.

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Kevin: Okay.
Nice feature right, Billy?

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Billy: It is. It's nice to have
the opportunity today

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to check it out and make sure
I know what I'm doing.

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Kevin: [ Laughs ]
Well, I know Caffrey's
going to love it, right?

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If it gets him in and out
of that pool, that's terrific.

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Billy: Yeah.
Kevin: You know what's also
going to be terrific?

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Giving you the keys back
in a couple of weeks.

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Billy: We can't wait.
Kevin: I bet.

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Alright,
I'll catch up with you guys.

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Well, as I said,
accessibility is key.

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And one of the ways to do that
is to make sure

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that this bluestone patio

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comes flush with the thresholds
of the entranceway.

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So there was one here,
there was one here.

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And there's
a double door behind me.

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Now, if Charlie had taken this
patio and he started it here,

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and then he pitched it away
from the house, this is 24 feet,

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That means the patio
would have been down

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about three inches right here.

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The solution was this --
a center linear drain,

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which means that they can now
pitch the patio

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from one side to the center

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and the other side
to the center.

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So we have two high points,
flush here and flush over there.

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There are two cap options
for the grates,

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and I'm told that Billy
and Michelle have chosen

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the black option right there.

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And, well, the effect
is terrific. Check this out.

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Bluestone patio comes right
to the threshold.

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No lip. These doors will be
controlled by a motor, will

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open easily, and you'll be able
to come right into the kitchen.

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The quartzite countertops
are in with a big deep overhang.

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We've got some appliances
going in, the hood right there,

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and then we've got the waterfall
edge detail right there.

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That is a beautiful look.

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And as you push forward,
we come into the living room

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and we've got a staircase
going down to the lower level,

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and there's quite a bit of work
still left

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to be done down there,
but down on the lower level

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there is one place
that is complete

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and that is our new
mechanical room,

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a portion of which is dedicated
to our new geothermal system.

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And today we've got not one

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but two Tretheweys here to make
sure it's up to our standards.

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♪♪

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Richard: So, Ross,
there are a million ways

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you can heat or cool
a building here in New England.

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It could be a ducted system.
It could be heat pumps nowadays.

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So you had the engineering
challenge here.

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What did you come up with?
Ross: Yeah. So it all started

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with a conversation with Billy
and Michelle to understand

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their goals and expectations
for the project.

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Right? And one of the things
that we knew

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is that we had a lot of glass

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and we had some old
brick walls, right?

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So we needed to think
about comfort.

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And the way we did that was
with hydronic radiant floors.

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They also wanted
to be energy-efficient.

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So that led us to
a solar-panel system

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to generate electricity
to be used inside the house.

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Richard: What a perfect roof for
it. It's south-facing.

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It's extraordinary.
Ross: It's perfect.

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They also wanted to use
the ground to heat

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and cool their building.
Richard: Sure.

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Ross: So it started with
a geothermal system, right?

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There are four holes
that are drilled 500 feet deep.

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We lowered a U-bend pipe system
in it,

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filled with liquid,
grouted in place.

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Each one of those supply
and returns makes their way

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through trenches
into the foundation wall.

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And that is how they extract
the heat

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and reject heat to the ground.

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Richard: So it can pick up
some of that 50 degrees

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that's under the ground,

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transfer it into the heating
inside the building,

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and we can heat this place
for almost free.

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Ross: That's right.
Richard: Cool.

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Let's go to command central.

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Well, Ross, I have seen

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plenty of your mechanical
design layouts

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from boiler rooms like this.
But I tell you, this is art.

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Ross: Yeah, this one wins.
Richard: It's just you see it.

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You know, it doesn't always
get piped like this, you know?

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So everything is logical
and simple, really.

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It seems complex,
but it really isn't.

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And look at this.
It's almost like artwork.

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Look at the ductwork.
It's like they've painted it in.

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Ross:
Everything's dialed in perfect.

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Richard:
I wish it was always like this.

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Ross: I know. You're telling me.

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So this is where
the geo piping starts, right?

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So here's the four supplies

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and the four returns coming
through the foundation wall.

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They're connected
to these circular pumps.

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Richard: Super-efficient pumps.
Ross: And this circular pump

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is going to be
on the entire geo loop. Right?

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So it communicates from the geo
heat pumps to the geo field.

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This is 50 degrees on this side.
And the heat pump elevates

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it to 120 degrees
to heat the building.

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Or it can be cooled to
45 degrees to cool the building.

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Richard:
And these heat pumps always seem
so confusing to people.

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But inside
it's relatively simple.

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It's got a really efficient
compressor inside

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that can change its speed,

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and you get heat
exchangers inside,

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and that will actually
compress the refrigerant

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to get it hotter,
get it hot,

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or release the refrigerant
to get it a little colder.

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Ross: That's right.
And so now we can

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take that 45-degree water
when we're cooling

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and store it
in the chilled water tank.

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Right?
So this stores nice cold water.

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We can also take
120-degree water and store it

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in the hot tank, right?
For heating the building.

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Richard: Right. And this tank
is really interesting.

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This is where we store
all the heated liquid

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that we're going to use,
but the other thing is this

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amazing heat exchanger
that goes down inside here

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that has potable water
go through it.

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So fresh water comes through,
comes down.

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It picks up the heat
from that 120 stored.

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And now it could go
to the faucets.

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But actually it goes over
to this tank right here.

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This is a hybrid water heater.

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And that has
a little element in it.

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But what's most important is
it's got a heat pump on the top.

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And what that does is it,
you know,

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these rooms can be 90 degrees
because you've got all the heat

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coming off of the pumps
and the piping.

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And so now you'll take that,
instead of having it be too hot,

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have it go right
into the hot water.

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Have plenty of hot water.

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Ross: This is going to
air-condition this room

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and take that heat
and put it into the hot water.

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Richard:
Right. It's pretty smart.

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Ross: Amazingly efficient.
Richard: Pretty smart.

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Ross: The other thing too,
is that when we are taking

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this chilled water, right,
and we're cooling the building,

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we're sending it over
to air handlers like this.

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So we have return air
that's coming through a filter.

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It comes through
the air handler.

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This is our chilled water
or cooling piping.

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Richard: Yeah.
Ross: It goes through the blower

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and then makes its way to
the hot water coil for heating.

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Richard: So here's our
hot water heating coil.

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And the air blows across it.
Like an automobile radiator,

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it heats the air.

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Now, we don't have radiant
everywhere in this building.

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So in some cases we're going
to have air handlers like this

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where the thermostat
is going to say,

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"I need to be heating,"
and it'll use this coil,

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or it's going to say,
"I need cooling"

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and it'll be using this coil.

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And that's where you get
that simultaneous heating

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and cooling
that's important to you.

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You know, you look at this,
it's just art,

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but it is a fair amount
of industry.

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I mean, this is
a big amount of money

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by the time you start talking
about the wells

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and the piping and the ductwork
and everything else.

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Some people would say, "Why?"
Ross: Right.

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Richard:
What do you say to that?

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Ross: I mean, it does seem
over the top

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when you first look at it.
But, you know, the homeowners

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had a really long-term viewpoint
on this project, right?

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They had a 50-year time horizon.

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And when you have a really
long time horizon,

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the capital cost, the up-front
cost doesn't matter as much.

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Richard: Yeah.
Ross: And on top of that,

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because everything here
runs on electricity,

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we size the solar panel system
to generate the electricity

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that the heat pumps use,

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in addition to all
the circulator pumps.

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So effectively
they are net zero,

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meaning they don't have a cost
to heat and cool this building.

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Richard: And there's a tax
credit too, right?

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Ross: That's right.
Federal tax credit as well.

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Richard: This is the place
I'm going to want to sit

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every time I come here.
Not in the living room anymore.

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Alright. I bet you our rating
is going to be really good

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for my energy rater
on the mechanical system,

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so we'll get an A+ there.
Ross: Absolutely.

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Richard: Now, I got to go check
with him to see how we did

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on our building structure.
Ross: Good luck.

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Richard: Alright.
Ross: See you.

238
00:08:44,066 --> 00:08:47,900
♪♪

239
00:08:47,966 --> 00:08:49,733
Kevin: John, you're making some
great progress for us here.

240
00:08:49,800 --> 00:08:51,266
John: Thank you.
Kevin: Some smart-looking

241
00:08:51,333 --> 00:08:52,833
appliances too.
John: Very smart.

242
00:08:52,900 --> 00:08:54,800
Kevin: Smart. And I'm told
that helps with accessibility?

243
00:08:54,866 --> 00:08:56,033
John: Yes. Correct.

244
00:08:56,100 --> 00:08:57,633
So, we don't have electricity
in the house yet,

245
00:08:57,700 --> 00:09:00,133
but this will have a feature
on -- both of these ovens --

246
00:09:00,200 --> 00:09:01,933
that you touch a button and then
the door

247
00:09:02,000 --> 00:09:03,700
automatically pops open.
Kevin: Very nice.

248
00:09:03,766 --> 00:09:06,533
John: And they also swing.
These are left-swing doors.

249
00:09:06,600 --> 00:09:08,200
Kevin: Right. Instead of
the traditional pull-down.

250
00:09:08,266 --> 00:09:10,066
John: Correct. Yeah.
Same on this one.

251
00:09:10,133 --> 00:09:11,433
Kevin:
And this unit is what here?

252
00:09:11,500 --> 00:09:13,500
John:
This is a convection steam oven.

253
00:09:13,566 --> 00:09:15,833
This replaces
a traditional microwave today.

254
00:09:15,900 --> 00:09:17,633
Very quick-cooking.

255
00:09:17,700 --> 00:09:20,033
And it comes out very fresh
with leftovers.

256
00:09:20,100 --> 00:09:21,133
Kevin: Yep.
John: Things like that.

257
00:09:21,200 --> 00:09:22,333
Kevin: Terrific.
John: Traditional built-in

258
00:09:22,400 --> 00:09:24,200
refrigerator
with ice and water on the door.

259
00:09:24,266 --> 00:09:26,166
Kevin: Okay.
John: Got our nice dishwasher

260
00:09:26,233 --> 00:09:28,233
here, waiting on a panel
for that.

261
00:09:28,300 --> 00:09:29,600
That's going to match
the cabinetry there.

262
00:09:29,666 --> 00:09:32,066
Kevin: Very nice. Faucet.
I'm told that when the plumbing

263
00:09:32,133 --> 00:09:33,900
is finally connected
that this is touchless as well?

264
00:09:33,966 --> 00:09:35,300
John: That's correct, yeah.
Kevin: So you just wave

265
00:09:35,366 --> 00:09:36,900
your hand over it,
nothing easier than that.

266
00:09:36,966 --> 00:09:38,266
John: Correct.
Kevin: And then cooktop?

267
00:09:38,333 --> 00:09:40,800
John: Yep.
So this is an induction cooktop.

268
00:09:40,866 --> 00:09:44,733
Traditional cooktops have a spot
for each particular pan.

269
00:09:44,800 --> 00:09:46,566
Kevin: Right.
John: This cooktop does not
do that.

270
00:09:46,633 --> 00:09:49,366
You can put a pot
anywhere on this surface here.

271
00:09:49,433 --> 00:09:50,666
Kevin: Oh, very nice.

272
00:09:50,733 --> 00:09:53,100
John: And then once
we have electricity,

273
00:09:53,166 --> 00:09:56,500
the cooktop communicates
with the hood via Wi-Fi.

274
00:09:56,566 --> 00:09:59,233
So when you turn the cooktop on,

275
00:09:59,300 --> 00:10:00,266
the hood will also turn on
at the same time.

276
00:10:00,333 --> 00:10:01,333
Kevin: No kidding.
John: Yeah.

277
00:10:01,400 --> 00:10:02,500
Kevin: Automatically?
John: Yeah.

278
00:10:02,566 --> 00:10:04,000
A lot of new technology.
Kevin: No one's got to

279
00:10:04,066 --> 00:10:05,433
reach up here
or have to reach up there.

280
00:10:05,500 --> 00:10:07,366
If you can control this...
John: Everything's controlled

281
00:10:07,433 --> 00:10:08,833
right here.
Kevin: That's very nice.

282
00:10:08,900 --> 00:10:10,666
Alright. Looks good. I'm glad.

283
00:10:10,733 --> 00:10:12,933
Anything that adds accessibility
is helpful for our homeowners.

284
00:10:13,000 --> 00:10:14,100
John: Yes. That's true.
Kevin: Alright.

285
00:10:14,166 --> 00:10:15,366
I'll let you get back to it.
John: You got it.

286
00:10:15,433 --> 00:10:16,366
Thank you.

287
00:10:16,433 --> 00:10:20,400
♪♪

288
00:10:20,466 --> 00:10:22,966
Kevin: Our mudroom sits just off
the center hallway

289
00:10:23,033 --> 00:10:24,866
and the floating staircase
right here.

290
00:10:24,933 --> 00:10:27,000
And you can see that
on this part of the house

291
00:10:27,066 --> 00:10:28,933
we've got the beautiful
white oak floors.

292
00:10:29,000 --> 00:10:30,400
But we're hoping
that the mudroom is going

293
00:10:30,466 --> 00:10:31,700
to be a hard working room.

294
00:10:31,766 --> 00:10:34,233
So this will be tile
from here forward.

295
00:10:34,300 --> 00:10:37,833
And we're going to make
that a nice even threshold.

296
00:10:37,900 --> 00:10:40,400
The cabinetry is in,
the beautiful oak seating is in.

297
00:10:40,466 --> 00:10:41,766
We've got a closet on that side.

298
00:10:41,833 --> 00:10:44,166
And eventually we're going
to put a door in right here.

299
00:10:44,233 --> 00:10:45,733
Tommy, we've got
a blower-door test.

300
00:10:45,800 --> 00:10:47,566
So we want to get
this place sealed up

301
00:10:47,633 --> 00:10:49,000
as quickly as possible.

302
00:10:49,066 --> 00:10:50,466
And I'm told this
is a fire door.

303
00:10:50,533 --> 00:10:52,333
Tom: This has to be
a fire-rated door.

304
00:10:52,400 --> 00:10:54,966
In other words, you have to have
20 to 30 minutes fire rating

305
00:10:55,033 --> 00:10:56,300
because this is a garage.

306
00:10:56,366 --> 00:10:58,633
If anything should happen
in the garage like a fire,

307
00:10:58,700 --> 00:11:00,433
you want to have 20 minutes
to get out of the house.

308
00:11:00,500 --> 00:11:01,600
Kevin: Alright.

309
00:11:01,666 --> 00:11:03,066
So you got a temporary step
right here, Tommy.

310
00:11:03,133 --> 00:11:04,800
But this is going away?

311
00:11:04,866 --> 00:11:06,400
Tom: It's going to go away
because Caffrey's

312
00:11:06,466 --> 00:11:08,000
already having trouble
with stairs.

313
00:11:08,066 --> 00:11:09,600
So eventually we're going
to put a ramp in here.

314
00:11:09,666 --> 00:11:11,300
It's going to be
sooner than later.

315
00:11:11,366 --> 00:11:12,800
And that will help him
get up here.

316
00:11:12,866 --> 00:11:14,700
And then later,
if he needs to wheelchair up,

317
00:11:14,766 --> 00:11:15,766
he can get a chair in.

318
00:11:15,833 --> 00:11:17,233
Kevin:
Walk now, wheel eventually.

319
00:11:17,300 --> 00:11:19,033
Tom: Right. And we'll have
the special threshold,

320
00:11:19,100 --> 00:11:21,000
basically
an accessibility threshold

321
00:11:21,066 --> 00:11:22,366
which is nice and flat.

322
00:11:22,433 --> 00:11:24,533
So there won't be any
interruption for the wheelchair

323
00:11:24,600 --> 00:11:25,833
or anything to trip on.

324
00:11:25,900 --> 00:11:27,166
Kevin:
So the tile is going to come

325
00:11:27,233 --> 00:11:29,066
and be installed right up
to this level?

326
00:11:29,133 --> 00:11:30,900
Tom: Right. It's actually going
to be a hair

327
00:11:30,966 --> 00:11:32,000
below this right here.

328
00:11:32,066 --> 00:11:34,166
I wanted the door
to be slightly higher.

329
00:11:34,233 --> 00:11:36,366
So when they put the tile in,
they can slide it

330
00:11:36,433 --> 00:11:38,000
under the threshold.
Kevin: Alright.

331
00:11:38,066 --> 00:11:39,333
Well, I got my belt.
I can give you a hand.

332
00:11:39,400 --> 00:11:40,366
Where do you want to start?

333
00:11:40,433 --> 00:11:41,733
Tom: We're going to start
on this side

334
00:11:41,800 --> 00:11:43,866
installing our shims on
the location where the butts

335
00:11:43,933 --> 00:11:46,466
or the hinges are.
We'll make those plumb

336
00:11:46,533 --> 00:11:48,566
and then we'll put the door
in and against them.

337
00:11:48,633 --> 00:11:50,000
Kevin:
Alright, I'll get my belt.

338
00:11:50,066 --> 00:11:53,000
Tom: Alright.
So I've got a laser set up.

339
00:11:53,066 --> 00:11:54,733
Now, the first thing
I want to do is I want

340
00:11:54,800 --> 00:11:57,266
to divide the opening in half.

341
00:11:57,333 --> 00:12:04,566
And the opening for the jamb
on the door is 37 5/8.

342
00:12:04,633 --> 00:12:06,566
That's the size of it.
Kevin: Okay.

343
00:12:06,633 --> 00:12:08,033
Tom: We have to shim that in.

344
00:12:08,100 --> 00:12:11,366
So if I check the --
I get 3/4 of an inch.

345
00:12:11,433 --> 00:12:14,900
So I divide that in half
and that would be 3/8 of an inch

346
00:12:15,000 --> 00:12:19,000
from the line and 3/8
of an inch from the wall.

347
00:12:19,066 --> 00:12:24,366
I set up my plumb bob
or the laser light randomly.

348
00:12:24,433 --> 00:12:29,466
Now, if I measure from the laser
light back to my division line

349
00:12:29,533 --> 00:12:31,900
right here,
which is centering it

350
00:12:31,966 --> 00:12:35,566
in the opening, that's an inch
and a half right there.

351
00:12:35,633 --> 00:12:39,233
So that means that I want
to have my shims in place

352
00:12:39,300 --> 00:12:42,966
so that they match up
with this line right here.

353
00:12:43,033 --> 00:12:46,166
So I move them in and out.

354
00:12:46,233 --> 00:12:49,300
And as soon as
that meets that line,

355
00:12:49,366 --> 00:12:52,866
I should be the right distance
that I need,

356
00:12:52,933 --> 00:12:55,100
which is an inch
and a half right there.

357
00:12:55,166 --> 00:12:58,100
And I'll do that
at all the hinge locations,

358
00:12:58,166 --> 00:13:01,333
making this side plumb.

359
00:13:01,400 --> 00:13:04,433
Alright. Now we're going to do
the top hinge right here

360
00:13:04,500 --> 00:13:07,000
and take a measurement
from the light.

361
00:13:07,066 --> 00:13:08,200
Kevin: Oh, look at that.

362
00:13:08,266 --> 00:13:09,466
You've got a sixth sense
for these things.

363
00:13:09,533 --> 00:13:10,600
That's right on.
Tom: Yeah.

364
00:13:10,666 --> 00:13:12,500
Sometimes you get lucky.

365
00:13:15,766 --> 00:13:17,866
Alright. Right here
on the center hinge.

366
00:13:17,933 --> 00:13:19,733
Kevin: Alright, let's see.
Tom: How's that there, sonny?

367
00:13:19,800 --> 00:13:21,366
Kevin:
Ugg. Nailed it again. Perfect.

368
00:13:21,433 --> 00:13:22,866
Tom: There you go. Alright.

369
00:13:25,100 --> 00:13:29,333
Okay, just a quick check.
See how we did here.

370
00:13:29,400 --> 00:13:31,233
Shouldn't be any space.

371
00:13:31,300 --> 00:13:33,266
Nice and plumb, perfect.

372
00:13:33,333 --> 00:13:34,833
[ Drill whirring ]

373
00:13:38,233 --> 00:13:42,000
Okay, good. Now, that'll hold
the doorjamb flush

374
00:13:42,066 --> 00:13:44,533
with the wall when we push it
into the opening.

375
00:13:44,600 --> 00:13:47,533
Alright, let's stand it up
just to give it a dry fit.

376
00:13:47,600 --> 00:13:48,833
Kevin:
Watch those shims, please.

377
00:13:48,900 --> 00:13:52,466
Tom: Yeah. Okay, so I think
it's going to be fine.

378
00:13:52,533 --> 00:13:55,766
So let's take it. We're going to
lay it back down to you.

379
00:13:55,833 --> 00:13:58,166
Take it down.
Make sure you have a good grip.

380
00:13:58,233 --> 00:13:59,900
Kevin: I got it.
Tom: It's heavy.

381
00:14:01,900 --> 00:14:04,333
Alright.
So now what I want to do

382
00:14:04,400 --> 00:14:07,766
is I want to seal
underneath this door right here.

383
00:14:07,833 --> 00:14:09,300
I'm going to seal it with foam.

384
00:14:09,366 --> 00:14:12,700
But this is a foam
that is fire-rated.

385
00:14:12,766 --> 00:14:15,333
Then we're going to stand it
back up into the opening.

386
00:14:19,733 --> 00:14:21,200
You ready there, sonny?

387
00:14:21,266 --> 00:14:22,666
Kevin: Standing by.

388
00:14:22,733 --> 00:14:24,066
Tom: Alright, try it.
Kevin: Like it?

389
00:14:24,133 --> 00:14:27,000
Tom: Yeah. There you go.

390
00:14:27,066 --> 00:14:29,833
Alright, hold it tight
on the hinge side.

391
00:14:29,900 --> 00:14:34,700
Now, if I take the level
and I put it on the wall,

392
00:14:34,766 --> 00:14:39,400
you can see that this is the old
existing wall of the house.

393
00:14:39,466 --> 00:14:41,433
And look at how far
out of plumb it is

394
00:14:41,500 --> 00:14:43,533
if I hold my level
plumb like that.

395
00:14:43,600 --> 00:14:46,133
It's 3/4 of an inch out.

396
00:14:46,200 --> 00:14:50,866
So what I'm going to do
is put my level on the jamb.

397
00:14:50,933 --> 00:14:54,833
You can see that
the jamb is almost level.

398
00:14:54,900 --> 00:14:57,166
I've got to move it
in just a little bit,

399
00:14:57,233 --> 00:14:59,933
but you can see how far away
from the face of the wall

400
00:15:00,000 --> 00:15:02,533
it is down here,
but it's flush at the top.

401
00:15:02,600 --> 00:15:06,100
So if I can just push this
in just a little bit more.

402
00:15:08,133 --> 00:15:09,766
Just like that.

403
00:15:09,833 --> 00:15:13,333
That little bit might make
a difference right there.

404
00:15:13,400 --> 00:15:14,633
Check it.

405
00:15:15,866 --> 00:15:18,366
Yeah, that bubble is right on.

406
00:15:18,433 --> 00:15:21,500
So that door is plumb
in both directions.

407
00:15:23,833 --> 00:15:25,333
Kevin: That looks good there.

408
00:15:25,400 --> 00:15:26,833
[ Drill whirs ]

409
00:15:30,633 --> 00:15:31,833
Tom: How is it there, sonny?
Speak to me.

410
00:15:31,900 --> 00:15:33,366
Kevin: One more. Hang on.
[ Hammer pounds ]

411
00:15:33,433 --> 00:15:34,600
Alright, set a screw.

412
00:15:34,666 --> 00:15:36,033
[ Drill whirs ]

413
00:15:46,266 --> 00:15:48,166
[ Drill whirs ]

414
00:15:49,866 --> 00:15:54,400
Tom: Alright, so now our door
is hung,

415
00:15:54,466 --> 00:15:57,766
level and plumb and even.

416
00:15:59,133 --> 00:16:00,900
Next thing we have to do

417
00:16:00,966 --> 00:16:04,266
is air-seal the joint
with the fire caulking.

418
00:16:05,466 --> 00:16:06,866
Kevin:
You good out there, pops?

419
00:16:06,933 --> 00:16:09,200
Tom: Yep. I'm good.
Kevin: Alright.

420
00:16:09,266 --> 00:16:11,933
Oh, look at that.
Nice swing. Good seal.

421
00:16:12,000 --> 00:16:13,900
Tom: All sealed up good.

422
00:16:13,966 --> 00:16:16,466
So it works good. Feels good.

423
00:16:16,533 --> 00:16:19,233
Tape up that hole and we're
ready for the blower-door test.

424
00:16:19,300 --> 00:16:20,433
Kevin: Nice.

425
00:16:20,500 --> 00:16:24,933
♪♪

426
00:16:25,000 --> 00:16:27,000
Richard: So, Charlie, as you
started this project,

427
00:16:27,066 --> 00:16:28,933
you were presented
with a new and pretty

428
00:16:29,000 --> 00:16:31,266
stringent energy code here.
Charlie: That's right.

429
00:16:31,333 --> 00:16:34,333
Any addition that's
1,000 square feet or greater

430
00:16:34,400 --> 00:16:37,966
or a 50% or greater renovation
is affected.

431
00:16:38,033 --> 00:16:39,300
Richard: That's like almost
every project, right?

432
00:16:39,366 --> 00:16:40,566
Charlie: Almost all of them.
Richard: Alright.

433
00:16:40,633 --> 00:16:42,133
So this is called
the HERS rating,

434
00:16:42,200 --> 00:16:43,966
Home Energy Rating System.

435
00:16:44,033 --> 00:16:45,233
It's been around for a while.

436
00:16:45,300 --> 00:16:48,400
It analyzes the HVAC equipment,
the appliances,

437
00:16:48,466 --> 00:16:51,100
but mostly the R-value
of the building itself, right?

438
00:16:51,166 --> 00:16:52,633
Charlie: That's right.
Richard: Now, when I started in

439
00:16:52,700 --> 00:16:57,000
this business -- what? -- the
HERS rating might have been 140.

440
00:16:57,066 --> 00:16:58,633
If we did this project
a year ago,

441
00:16:58,700 --> 00:17:01,266
it might have been 100,
and now it is...?

442
00:17:01,333 --> 00:17:03,066
Charlie: 52.
Richard: 52.

443
00:17:03,133 --> 00:17:05,733
So now when you think about
that, you got to start saying,

444
00:17:05,800 --> 00:17:08,500
"Well, where can I -- where can
I improve my R-value?"

445
00:17:08,566 --> 00:17:09,800
Charlie: That's right.
And when Billy and Michelle

446
00:17:09,866 --> 00:17:11,966
bought this,
they love a mid-century modern.

447
00:17:12,033 --> 00:17:14,633
They loved the glass,
but they also loved the brick.

448
00:17:14,700 --> 00:17:17,533
Richard: Right. This brick is
sort of such a focal point

449
00:17:17,600 --> 00:17:20,066
in this room, but it's not great
for R-value.

450
00:17:20,133 --> 00:17:22,800
Charlie: No, it's brick inside
as well as outside.

451
00:17:22,866 --> 00:17:24,400
And if you remember,
it has that little layer

452
00:17:24,466 --> 00:17:26,633
of foam on the inside.
Richard: 60-year-old Styrofoam

453
00:17:26,700 --> 00:17:28,033
and it's barely working.

454
00:17:28,100 --> 00:17:30,533
So what was the R-value of this?
Charlie: We had like an R7.

455
00:17:30,600 --> 00:17:33,033
Richard: So that's not good.
And that couldn't be changed.

456
00:17:33,100 --> 00:17:35,100
Charlie: That's right.
Richard: And then there was

457
00:17:35,166 --> 00:17:36,300
the floor, right?

458
00:17:36,366 --> 00:17:39,166
This was a concrete slab
and the R-value was...?

459
00:17:39,233 --> 00:17:40,633
Charlie: Zero.
Richard: Zero is not good.

460
00:17:40,700 --> 00:17:43,200
Charlie: Not good. So we demoed
all the concrete.

461
00:17:43,266 --> 00:17:45,733
We saw-cut it,
had a mini excavator in here.

462
00:17:45,800 --> 00:17:47,700
Made the work easy.
But it was a lot of work.

463
00:17:47,766 --> 00:17:49,700
Richard: So it was so dramatic
to see it all come out.

464
00:17:49,766 --> 00:17:52,100
But it was great because it
actually provided a place for us

465
00:17:52,166 --> 00:17:54,266
to run ductwork
for air conditioning here.

466
00:17:54,333 --> 00:17:55,833
Charlie: And once all
the ductwork was run,

467
00:17:55,900 --> 00:17:57,933
we encased it
with foam insulation,

468
00:17:58,000 --> 00:18:00,666
refilled all the trenches,
compacted it.

469
00:18:00,733 --> 00:18:02,633
Then I took another layer
of closed-cell foam

470
00:18:02,700 --> 00:18:05,933
and encase the entire floor,
wrapped it up the foundation,

471
00:18:06,000 --> 00:18:07,766
about two more inches
of closed cell,

472
00:18:07,833 --> 00:18:10,266
and that gave us an R-value
of about 15 alone.

473
00:18:10,333 --> 00:18:11,766
Richard: And then you finished
it off with...

474
00:18:11,833 --> 00:18:14,766
Charlie: Another layer of
concrete sleeper system

475
00:18:14,833 --> 00:18:17,066
with two inches
of foam infilled,

476
00:18:17,133 --> 00:18:19,900
a layer of subflooring
radiant panel,

477
00:18:19,966 --> 00:18:21,566
then our finished white oak
again.

478
00:18:21,633 --> 00:18:22,733
Richard:
An unbelievable sandwich.

479
00:18:22,800 --> 00:18:24,933
And it all
came out perfectly to grade.

480
00:18:25,000 --> 00:18:26,466
And the R-value was...?
Charlie: I think

481
00:18:26,533 --> 00:18:28,666
we have around a 17 or 20.
Richard: Which is great.

482
00:18:28,733 --> 00:18:29,866
Charlie: It's very good.
Richard: Alright.

483
00:18:29,933 --> 00:18:31,600
So the question
is whether all these things

484
00:18:31,666 --> 00:18:33,700
are going to make us
pass our test.

485
00:18:33,766 --> 00:18:35,933
So, Charlie, you guys
have worked really hard

486
00:18:36,000 --> 00:18:39,666
to get to this test day
with our HERS rater,

487
00:18:39,733 --> 00:18:41,233
Kevin Ring. Hey, Kevin.

488
00:18:41,300 --> 00:18:42,300
Kevin R.:
Good morning, gentlemen.

489
00:18:42,366 --> 00:18:43,500
Richard: Nice to see you.

490
00:18:43,566 --> 00:18:45,733
So, take us through
the HERS rating system.

491
00:18:45,800 --> 00:18:47,100
Kevin R.: Well, we started
at the beginning

492
00:18:47,166 --> 00:18:48,800
with a projected energy model,

493
00:18:48,866 --> 00:18:52,433
which is an energy model
based upon our assumptions

494
00:18:52,500 --> 00:18:55,433
and best guesses as to what's
going to go into the walls

495
00:18:55,500 --> 00:18:57,333
and the roof and the equipment.

496
00:18:57,400 --> 00:18:58,466
Richard: So you entered it
all into a computer.

497
00:18:58,533 --> 00:19:00,600
Kevin R.: We put this all in
based upon

498
00:19:00,666 --> 00:19:02,066
assumptions at the beginning.
Richard: Yeah.

499
00:19:02,133 --> 00:19:05,166
Kevin R.: And then we visit
during the course of the work

500
00:19:05,233 --> 00:19:07,666
to verify all the materials
that went in.

501
00:19:07,733 --> 00:19:10,033
Then we collected all of
the make and model number

502
00:19:10,100 --> 00:19:13,533
from the mechanical equipment,
and we get the energy-efficiency

503
00:19:13,600 --> 00:19:15,633
specifications
for that material.

504
00:19:15,700 --> 00:19:19,666
And the last remaining unknown
is the infiltration rate

505
00:19:19,733 --> 00:19:21,133
for the house, and that --
Richard: The actual way

506
00:19:21,200 --> 00:19:22,633
that the house was built
and assembled?

507
00:19:22,700 --> 00:19:24,966
Kevin R.: That represents how
drafty the house

508
00:19:25,033 --> 00:19:26,366
would be on a windy day.

509
00:19:26,433 --> 00:19:27,800
Richard: Okay.
Kevin R.: And we test that

510
00:19:27,866 --> 00:19:29,133
with a blower door.
Richard: Right.

511
00:19:29,200 --> 00:19:31,066
So you got your blower door?
Kevin R.: Yes, we do.

512
00:19:31,133 --> 00:19:32,733
Richard:
Alright, let's start the test.

513
00:19:32,800 --> 00:19:34,066
Kevin R.: We'll set that up now.

514
00:19:34,133 --> 00:19:43,400
♪♪

515
00:19:43,466 --> 00:19:52,766
♪♪

516
00:19:52,833 --> 00:20:02,133
♪♪

517
00:20:02,200 --> 00:20:11,500
♪♪

518
00:20:11,566 --> 00:20:20,833
♪♪

519
00:20:20,900 --> 00:20:24,100
Richard: Alright, so blower-door
fan is on.

520
00:20:24,166 --> 00:20:25,833
So take us through this test.

521
00:20:25,900 --> 00:20:27,800
Kevin R.:
What the fan does is it blows

522
00:20:27,866 --> 00:20:29,166
air out of the house

523
00:20:29,233 --> 00:20:31,566
until we've achieved
a pressure difference

524
00:20:31,633 --> 00:20:33,600
between inside and outside.

525
00:20:33,666 --> 00:20:36,100
And that pressure difference
is 50 pascals.

526
00:20:36,166 --> 00:20:37,666
Richard: Pascals.
And that's equivalent

527
00:20:37,733 --> 00:20:39,833
to like a 20-mile-an-hour wind,
right?

528
00:20:39,900 --> 00:20:42,466
Kevin R.: Yes. And then what
the fan will measure,

529
00:20:42,533 --> 00:20:46,233
in cubic feet per minute,
how much air we have to blow

530
00:20:46,300 --> 00:20:48,200
in order to achieve
that particular pressure.

531
00:20:48,266 --> 00:20:50,166
Richard: How much time do you
need to get that reading

532
00:20:50,233 --> 00:20:51,766
with a big house like this?

533
00:20:51,833 --> 00:20:53,900
Kevin R.:
The fan takes about 10 minutes.

534
00:20:53,966 --> 00:20:55,466
Richard: Okay.
Kevin R.: At different speeds.

535
00:20:55,533 --> 00:20:56,666
Richard: Alright.

536
00:20:56,733 --> 00:20:58,200
I'm going to get coffee.
You want coffee?

537
00:20:58,266 --> 00:20:59,200
Charlie: Let's go.

538
00:20:59,266 --> 00:21:04,300
♪♪

539
00:21:04,366 --> 00:21:05,933
Richard:
Alright. Our test is done.

540
00:21:06,000 --> 00:21:07,633
Kevin R.: Yes, it is.
Richard: What'd you find out?

541
00:21:07,700 --> 00:21:08,900
Kevin R.:
The blower-door test is done.

542
00:21:08,966 --> 00:21:12,500
It came out to 1.4 ACH,
air changes per hour.

543
00:21:12,566 --> 00:21:14,300
Richard: In the old days,
what would we see

544
00:21:14,366 --> 00:21:15,400
before a tight building
like this?

545
00:21:15,466 --> 00:21:17,533
Kevin R.:
Oh, you'd see 8 to 20 ACH.

546
00:21:17,600 --> 00:21:19,166
Richard:
So this building is tight?

547
00:21:19,233 --> 00:21:20,800
Kevin R.: Yes.
Charlie: So I'm dying to know.

548
00:21:20,866 --> 00:21:22,100
How did we do?
Kevin R.: Well, we put

549
00:21:22,166 --> 00:21:24,966
this 1.4 ACH
into the energy model,

550
00:21:25,033 --> 00:21:27,000
and the HERS rating
came out to 39.

551
00:21:27,066 --> 00:21:29,600
Charlie: 39?
Looks like we're overachievers.

552
00:21:29,666 --> 00:21:30,900
Richard: Wow. You are.

553
00:21:30,966 --> 00:21:32,666
Kevin R.: That's a tribute
to your fine work.

554
00:21:32,733 --> 00:21:35,166
Charlie:
Well, thank you, but a lot
went into it for all of us.

555
00:21:35,233 --> 00:21:37,166
Richard: Right. Thank you, guys.
Charlie: Thank you.

556
00:21:37,233 --> 00:21:40,000
Richard: So, you know,
say you hadn't made that.

557
00:21:40,066 --> 00:21:42,833
The other great tool you have
is that smoke stick.

558
00:21:42,900 --> 00:21:44,600
You know, if there's
a little slightest infiltration

559
00:21:44,666 --> 00:21:46,966
with the door -- blower door on,
you can just see it.

560
00:21:47,033 --> 00:21:48,800
And that can teach so much.
Charlie: That's right.

561
00:21:48,866 --> 00:21:50,400
If you miss
the smallest thing,

562
00:21:50,466 --> 00:21:52,966
like not insulating around
a window or a slight crack

563
00:21:53,033 --> 00:21:54,933
in an opening, that smoke test
really shows it well.

564
00:21:55,000 --> 00:21:56,666
Richard: That's right.
So what do you think?

565
00:21:56,733 --> 00:21:58,700
Charlie: Well, if you really
think back 10 months ago

566
00:21:58,766 --> 00:22:00,000
when we started this process,

567
00:22:00,066 --> 00:22:02,866
you really have to be eyes
wide open going into it

568
00:22:02,933 --> 00:22:04,600
and let the homeowners
really know

569
00:22:04,666 --> 00:22:06,133
what all this is going to cost.
Richard: You know,

570
00:22:06,200 --> 00:22:07,800
this building will be here
for the next 100 years

571
00:22:07,866 --> 00:22:10,133
and it will be tight
and easy to operate forever.

572
00:22:10,200 --> 00:22:11,766
So I'm of two minds.

573
00:22:11,833 --> 00:22:13,366
Charlie: I agree with you.
Richard: But congratulations.

574
00:22:13,433 --> 00:22:14,633
You always do better
than the test.

575
00:22:14,700 --> 00:22:16,233
Charlie: Thanks, bud.
It was a good team effort.

576
00:22:16,300 --> 00:22:19,766
♪♪

577
00:22:19,833 --> 00:22:21,066
Kevin: Alright, pops,
a lot of progress,

578
00:22:21,133 --> 00:22:22,766
but still a lot left to do.

579
00:22:22,833 --> 00:22:24,400
Tom: Well, the final push
is on right now.

580
00:22:24,466 --> 00:22:25,433
We got a lot to do.

581
00:22:25,500 --> 00:22:26,766
Kevin: Alright, well,
until next time,

582
00:22:26,833 --> 00:22:28,433
I'm Kevin O'Connor.
Tom: And I'm Tom Silva.

583
00:22:28,500 --> 00:22:31,500
Kevin: For "This Old House" here
in Lexington, Massachusetts.

584
00:22:31,566 --> 00:22:33,233
So another mid-century modern.
Tom: Yeah.

585
00:22:33,300 --> 00:22:35,833
It looks good, though.
I like them. I like them.

586
00:22:35,900 --> 00:22:39,066
♪♪

587
00:22:40,333 --> 00:22:42,000
Kevin: Next time on
"This Old House"...

588
00:22:42,066 --> 00:22:43,433
Just 10 months ago,

589
00:22:43,500 --> 00:22:46,300
construction began on this
mid-century modern

590
00:22:46,366 --> 00:22:50,066
with a mission in historic
Lexington, Massachusetts.

591
00:22:50,133 --> 00:22:54,333
The task -- transform the space
into an accessible home

592
00:22:54,400 --> 00:22:57,000
but preserve
the original character.

593
00:22:57,066 --> 00:22:59,200
It was a race to the finish.

594
00:22:59,266 --> 00:23:01,066
But move-in day is here,

595
00:23:01,133 --> 00:23:04,200
and it's time to find out
if Charlie and his crew

596
00:23:04,266 --> 00:23:07,000
are ready to hand over the keys.

597
00:23:07,066 --> 00:23:08,600
That's next time.