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How much can soffit vents help? Frederick Wilson 07-03-2006
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Posted by Frederick Wilson on July 3, 2006, 7:29 pm
Hello,

I have a house from the 60s. It is 30 feet deep and 60 feet long. I have
3'x3' gable vents in each end of the house. Plus there are two roof
vents about 8 to 10 inches round.

There are no soffit vents what so ever. Reading on the Internet only
talks about the benefits to roof its self. I would like to know how much
it would help with the temperature in the rooms just below the attic.

The walkout basement family room and bedroom are always a good 15
degrees below that upstairs and the A/C runs all the time.

Will the vents help?

Thank you,
--
Frederick Wilson

_____________________________________
for multimedia design services visit
http://www.legalanimatics.com

Posted by mwlogs on July 3, 2006, 8:06 pm
The vents would help. Hot air rises, but if there is no way for cooler air
to enter so the hot air can exit the higher vents it gets trapped. That
said, without knowing the A/C configuration for supply and return vents what
you'll actually observe in the effect on cooling may not be that great. The
basement rooms that are at least partially surrounded by the cooling effect
of the earth will always be cooler than the upstairs rooms that are not.
Improving the air flow within the house (drawing the cool air up to the
upper levels and the warm air down to the lower levels) will probably have a
more dramatic effect on the cooling.

That said, there is also the risk of moisture build-up in the attic with
insufficient ventilation. Installing the soffit vents will help reduce
this, keeping mold, rot, and other moisture related problems to a minimum.


> Hello,
>
> I have a house from the 60s. It is 30 feet deep and 60 feet long. I have
> 3'x3' gable vents in each end of the house. Plus there are two roof vents
> about 8 to 10 inches round.
>
> There are no soffit vents what so ever. Reading on the Internet only talks
> about the benefits to roof its self. I would like to know how much it
> would help with the temperature in the rooms just below the attic.
>
> The walkout basement family room and bedroom are always a good 15 degrees
> below that upstairs and the A/C runs all the time.
>
> Will the vents help?
>
> Thank you,
> --
> Frederick Wilson
>
> _____________________________________
> for multimedia design services visit
> http://www.legalanimatics.com



Posted by tbasc@bellsouth.net on July 3, 2006, 8:23 pm

Frederick Wilson wrote:
> Hello,
>
> I have a house from the 60s. It is 30 feet deep and 60 feet long. I have
> 3'x3' gable vents in each end of the house. Plus there are two roof
> vents about 8 to 10 inches round.
>
> There are no soffit vents what so ever. Reading on the Internet only
> talks about the benefits to roof its self. I would like to know how much
> it would help with the temperature in the rooms just below the attic.
>
> The walkout basement family room and bedroom are always a good 15
> degrees below that upstairs and the A/C runs all the time.
>
> Will the vents help?
>
> Thank you,
> --
> Frederick Wilson
>
> _____________________________________
> for multimedia design services visit
> http://www.legalanimatics.com

Depends on your local climate and wind direction.
Look at the Building Science Corporation web site.
TB


Posted by Fred Wilson on July 3, 2006, 10:01 pm
I live in Indiana. So it does get quiet cold in the winter and it has
been 90 degrees F, for the past couple of days.

tbasc@bellsouth.net wrote:
> Frederick Wilson wrote:
>> Hello,
>>
>> I have a house from the 60s. It is 30 feet deep and 60 feet long. I have
>> 3'x3' gable vents in each end of the house. Plus there are two roof
>> vents about 8 to 10 inches round.
>>
>> There are no soffit vents what so ever. Reading on the Internet only
>> talks about the benefits to roof its self. I would like to know how much
>> it would help with the temperature in the rooms just below the attic.
>>
>> The walkout basement family room and bedroom are always a good 15
>> degrees below that upstairs and the A/C runs all the time.
>>
>> Will the vents help?
>>
>> Thank you,
>> --
>> Frederick Wilson
>>
>> _____________________________________
>> for multimedia design services visit
>> http://www.legalanimatics.com
>
> Depends on your local climate and wind direction.
> Look at the Building Science Corporation web site.
> TB
>

Posted by Jeff on July 3, 2006, 10:32 pm
Depends how much insulation is in your attic. This is more important in
winter. In summer if your ceiling is warm there is no convection (warm air
rises), in winter if the ceiling is cool than cold air sinks.


> Hello,
>
> I have a house from the 60s. It is 30 feet deep and 60 feet long. I have
> 3'x3' gable vents in each end of the house. Plus there are two roof vents
> about 8 to 10 inches round.
>
> There are no soffit vents what so ever. Reading on the Internet only talks
> about the benefits to roof its self. I would like to know how much it
> would help with the temperature in the rooms just below the attic.
>
> The walkout basement family room and bedroom are always a good 15 degrees
> below that upstairs and the A/C runs all the time.
>
> Will the vents help?
>
> Thank you,
> --
> Frederick Wilson
>
> _____________________________________
> for multimedia design services visit
> http://www.legalanimatics.com



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