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Posted by poster3814 on March 23, 2007, 11:20 am
Thank you very much for your reply. It seems very logical and informative.
Other helpful replies still welcome, too.
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kjpro @ usenet.com wrote:
>> If the basement is not used for "living space," is it more energy
>> efficient to have basement vents closed - so only the upstairs is heated
>> or air conditioned - or is more energy efficient to have them open - so
>> that the basement "insulates" the upstairs? Should a system be sized for
>> conditioning just the upstairs or sized for both the upstairs and
>> basement, which can obviously double the air volume to condition in a
>> one-story home?
>>
>> Thank you very much.
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>> Please respond to the newsgroup only. Email sent to this account goes
>> unread.
>
>
> Heating a basement will add to the overall operating cost. Yea sure, some of
> the heat will come up through the floor to help keep your floors warm and
> help heat the upstairs space. But you will also lose heat through the
> basement walls, floors, windows and doors. Whenever you increase the
> difference between the indoor and outdoor temperature the heat transfer
> increases. So it takes more energy to keep these spaces to temp. So the end
> result is increased operating cost. No two ways around it. The more space
> you heat, the more it is going to cost.
>
> As far as cooling is concerned, do you want the basement conditioned? If
> not, why condition it? But to answer your question, if you don't want the
> basement conditioned... don't include it in your load calculation.
>
> As to the "double air volume" comment, your basement is stuck in the ground.
> The ground temp is around 55 degrees F. The heat gain will come from
> appliances (in the basement) and the part that is above ground. For this
> reason, it takes much less to keep a basement cool.
>
>
>
>
>
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