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Takagi direct vent install Eric in North TX 07-14-2006
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Posted by Eric in North TX on July 14, 2006, 12:28 pm
I'm planing an install of a Takagi T-KD20 in the first floor of a 2
story addition. I'm a little confused by their install instructions. Do
I need to go through the second story roof with the exhaust vent?
My first choice would be to make it as short as possible. There are no
first floor windows on that wall, & only 2 on the entire wall, both 15'
or more from the intended location, there is a gable vent ~ 20' above
the intended location.


Posted by Eric in North TX on July 14, 2006, 1:16 pm

Eric in North TX wrote:
> I'm planing an install of a Takagi T-KD20 in the first floor of a 2
> story addition. I'm a little confused by their install instructions. Do
> I need to go through the second story roof with the exhaust vent?
> My first choice would be to make it as short as possible. There are no
> first floor windows on that wall, & only 2 on the entire wall, both 15'
> or more from the intended location, there is a gable vent ~ 20' above
> the intended location.

Perhaps I should have mentioned that a Takagi T-KD20 is a direct vent
tankless hotwater heater.


Posted by on July 14, 2006, 2:42 pm

Eric in North TX wrote:
> Eric in North TX wrote:
> > I'm planing an install of a Takagi T-KD20 in the first floor of a 2
> > story addition. I'm a little confused by their install instructions. Do
> > I need to go through the second story roof with the exhaust vent?
> > My first choice would be to make it as short as possible. There are no
> > first floor windows on that wall, & only 2 on the entire wall, both 15'
> > or more from the intended location, there is a gable vent ~ 20' above
> > the intended location.
>
> Perhaps I should have mentioned that a Takagi T-KD20 is a direct vent
> tankless hotwater heater.

I just installed the same thing... Works great, but beware of the
temperature. (It gets REALLY HOT). Also, be aware of your flow rate, we
had to change a few aerators (sp).

As far as venting, I would vent it out the side of the first floor as
long as there are windows close...


Posted by Eric in North TX on July 14, 2006, 3:59 pm
. Works great, but beware of the
> temperature. (It gets REALLY HOT). Also, be aware of your flow rate, we
> had to change a few aerators (sp).
>
> As far as venting, I would vent it out the side of the first floor as
> long as there are windows close...

Could you elaborate?
Temperature; too hot or too cold?
Flow rate; seriously reduced? I'm running an 85 psi booster, I hate
wimpy water pressure.
Vent; I plan to run it out the wall behind the unit, curious if I need
to get it above the roof.


Posted by Wayne Whitney on July 14, 2006, 5:31 pm

> Vent; I plan to run it out the wall behind the unit, curious if I
> need to get it above the roof.

My understanding is that a direct vent appliance typically has its
vent terminated at the side wall and that there is no need to get
above the roof. The appliance's manual should list the necessary
clearances between the vent termination and varous other features of
the house.

BTW, if you live in a climate where it never freezes, consider an
exterior model, it makes venting very easy.

Cheers, Wayne


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