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How Much outside Air? Bob Sisson 09-22-2007
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Posted by Bob Sisson on September 22, 2007, 11:03 am
We moved into a ~3500 sq.ft split level rambler in the spring.

The 30 year old construction is MUCH better than average, with polyethylene
vapor barriers in all the walls and ceilings, good windows, etc...

Problem, is it is almost TOO tight. Stale air...

Luckily, it is an All Electric house with a fairly recent and efficient
Heatpump.

The question is How much outside air to bring in?

I was considering putting in a 6" duct with a motorized damper from the
return to the outside. The Run would be about 25' when I get done snaking
it where it can go.

Will a 6" duct provide sufficient Air passively or do I need something like
an in-line Fantek ?

I will be controlling the damper with a home automation system than monitors
the outside temp & humidity along with the inside and trying not to waste
too much energy. I was also thinking about putting a pressure differential
switch in so that when the Kitchen fan, dryer and/or the bath fans generate
a negative pressure in the house the damper would also open...

Eventually the duct would feed a whole house dehumidifier so I could get rid
of the consoles in the furnace room... they keep the house comfortable at
higher temperatures than using the AC to remove the humidity and use less
energy to do so.

I am in Central Maryland, just north of Washington DC... so we get all kinds
of weather and humidity...

POLITE thoughts please ?


Bob



Posted by on September 22, 2007, 11:32 am
On Sat, 22 Sep 2007 11:03:58 -0400, "Bob Sisson"

>We moved into a ~3500 sq.ft split level rambler in the spring.
>
>The 30 year old construction is MUCH better than average, with polyethylene
>vapor barriers in all the walls and ceilings, good windows, etc...
>
>Problem, is it is almost TOO tight. Stale air...
>
>Luckily, it is an All Electric house with a fairly recent and efficient
>Heatpump.
>
>The question is How much outside air to bring in?
>
>I was considering putting in a 6" duct with a motorized damper from the
>return to the outside. The Run would be about 25' when I get done snaking
>it where it can go.
>
>Will a 6" duct provide sufficient Air passively or do I need something like
>an in-line Fantek ?
>
>I will be controlling the damper with a home automation system than monitors
>the outside temp & humidity along with the inside and trying not to waste
>too much energy. I was also thinking about putting a pressure differential
>switch in so that when the Kitchen fan, dryer and/or the bath fans generate
>a negative pressure in the house the damper would also open...
>
>Eventually the duct would feed a whole house dehumidifier so I could get rid
>of the consoles in the furnace room... they keep the house comfortable at
>higher temperatures than using the AC to remove the humidity and use less
>energy to do so.
>
>I am in Central Maryland, just north of Washington DC... so we get all kinds
>of weather and humidity...

        6 " is enough for politicians to sneak in. DON'T DO IT !!!!!

>
>POLITE thoughts please ?

        Where the FUCK do you think you are ?


>
>
>Bob
>

--
Click here every day to feed an animal that needs you today !!!
http://www.theanimalrescuesite.com/

Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/

Posted by Joseph on September 22, 2007, 12:11 pm
> On Sat, 22 Sep 2007 11:03:58 -0400, "Bob Sisson"
>
>>We moved into a ~3500 sq.ft split level rambler in the spring.
>>
>>The 30 year old construction is MUCH better than average, with
>>polyethylene
>>vapor barriers in all the walls and ceilings, good windows, etc...
>>
>>Problem, is it is almost TOO tight. Stale air...
>>
>>Luckily, it is an All Electric house with a fairly recent and efficient
>>Heatpump.
>>
>>The question is How much outside air to bring in?
>>
>>I was considering putting in a 6" duct with a motorized damper from the
>>return to the outside. The Run would be about 25' when I get done snaking
>>it where it can go.
>>
>>Will a 6" duct provide sufficient Air passively or do I need something
>>like
>>an in-line Fantek ?
>>
>>I will be controlling the damper with a home automation system than
>>monitors
>>the outside temp & humidity along with the inside and trying not to waste
>>too much energy. I was also thinking about putting a pressure
>>differential
>>switch in so that when the Kitchen fan, dryer and/or the bath fans
>>generate
>>a negative pressure in the house the damper would also open...
>>
>>Eventually the duct would feed a whole house dehumidifier so I could get
>>rid
>>of the consoles in the furnace room... they keep the house comfortable at
>>higher temperatures than using the AC to remove the humidity and use less
>>energy to do so.
>>
>>I am in Central Maryland, just north of Washington DC... so we get all
>>kinds
>>of weather and humidity...
>
> 6 " is enough for politicians to sneak in. DON'T DO IT !!!!!
>
>>
>>POLITE thoughts please ?
>
> Where the FUCK do you think you are ?

LOL, Perfect!!! Keyboard please... I know better than to have coffee
while reading too...

>
>
>>
>>
>>Bob
>>
>
> --
> Click here every day to feed an animal that needs you today !!!
> http://www.theanimalrescuesite.com/
>
> Paul ( pjm @ pobox . com ) - remove spaces to email me
> 'Some days, it's just not worth chewing through the restraints.'
> 'With sufficient thrust, pigs fly just fine.'
> HVAC/R program for Palm PDA's
> Free demo now available online http://pmilligan.net/palm/



Posted by on September 22, 2007, 10:51 pm

> On Sat, 22 Sep 2007 11:03:58 -0400, "Bob Sisson"
>
> >We moved into a ~3500 sq.ft split level rambler in the spring.
> >
> >The 30 year old construction is MUCH better than average, with
polyethylene
> >vapor barriers in all the walls and ceilings, good windows, etc...
> >
> >Problem, is it is almost TOO tight. Stale air...
> >
> >Luckily, it is an All Electric house with a fairly recent and efficient
> >Heatpump.
> >
> >The question is How much outside air to bring in?
> >
> >I was considering putting in a 6" duct with a motorized damper from the
> >return to the outside. The Run would be about 25' when I get done
snaking
> >it where it can go.
> >
> >Will a 6" duct provide sufficient Air passively or do I need something
like
> >an in-line Fantek ?
> >
> >I will be controlling the damper with a home automation system than
monitors
> >the outside temp & humidity along with the inside and trying not to waste
> >too much energy. I was also thinking about putting a pressure
differential
> >switch in so that when the Kitchen fan, dryer and/or the bath fans
generate
> >a negative pressure in the house the damper would also open...
> >
> >Eventually the duct would feed a whole house dehumidifier so I could get
rid
> >of the consoles in the furnace room... they keep the house comfortable at
> >higher temperatures than using the AC to remove the humidity and use less
> >energy to do so.
> >
> >I am in Central Maryland, just north of Washington DC... so we get all
kinds
> >of weather and humidity...
>
> 6 " is enough for politicians to sneak in. DON'T DO IT !!!!!
>
> >
> >POLITE thoughts please ?
>
> Where the FUCK do you think you are ?


Stormin still posts here.



Posted by Noon-Air on September 22, 2007, 11:59 am

> We moved into a ~3500 sq.ft split level rambler in the spring.
>
> The 30 year old construction is MUCH better than average, with
> polyethylene vapor barriers in all the walls and ceilings, good windows,
> etc...
>
> Problem, is it is almost TOO tight. Stale air...
>
> Luckily, it is an All Electric house with a fairly recent and efficient
> Heatpump.
>
> The question is How much outside air to bring in?
>
> I was considering putting in a 6" duct with a motorized damper from the
> return to the outside. The Run would be about 25' when I get done snaking
> it where it can go.
>
> Will a 6" duct provide sufficient Air passively or do I need something
> like an in-line Fantek ?
>
> I will be controlling the damper with a home automation system than
> monitors the outside temp & humidity along with the inside and trying not
> to waste too much energy. I was also thinking about putting a pressure
> differential switch in so that when the Kitchen fan, dryer and/or the bath
> fans generate a negative pressure in the house the damper would also
> open...
>
> Eventually the duct would feed a whole house dehumidifier so I could get
> rid of the consoles in the furnace room... they keep the house comfortable
> at higher temperatures than using the AC to remove the humidity and use
> less energy to do so.
>
> I am in Central Maryland, just north of Washington DC... so we get all
> kinds of weather and humidity...
>
> POLITE thoughts please ?
>
>
> Bob

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