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Old 03-31-2013, 08:55 AM   #1
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Single furnance heating three floors


I have a two story house with a single furnace. I gradually have figured out how to adjust the registers for the main two floors. Now though the basement is still cold. Is that just because the walls are not insulated or would it help to add a cold air return to the basement too? I was hoping since it is below ground that would act more as a natural insulator.

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Old 03-31-2013, 10:19 AM   #2
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Single furnance heating three floors


If it has a supply, a return will help.

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Old 03-31-2013, 10:25 AM   #3
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depends where U live. The ground can freeze 4 feet deep where I am so the bldg code for new houses insists that the first 4 feet below ground be insulated. Hot air rises and cold air settles so basements are naturally colder 2.
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Old 03-31-2013, 10:27 AM   #4
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I live in milwaukee Wisconsin. So it's pretty cold in winter but hot summers too.
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Old 03-31-2013, 10:30 AM   #5
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Single furnance heating three floors


I don't imagine your ground stays all that warm in the Winter so insulating the walls pays for itself with NRG/fuel savings and adds comfort.
Just googled your climate and you enjoy -30 to-40 just like I do.
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Old 04-01-2013, 01:10 AM   #6
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Single furnance heating three floors


Yeah, it does get 30-40 degrees. My parents insulated and put in sheetrock and they still have a cold basement. I was hoping it was just because they did not install a cold air return. Is it optimistic to think just the cold air return will keep the temp fairly close to the rest of the house?
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Old 04-01-2013, 04:56 AM   #7
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Single furnance heating three floors


A cold air return only will most likely make it colder in the basement. As it will put the basement into a negative pressure. And draw air in from the outside through ny cracks it can.

Must have a supply.
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Old 04-01-2013, 08:38 AM   #8
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It has two supplies just no return. So I was hoping return would help.
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Old 04-01-2013, 09:06 AM   #9
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Single furnance heating three floors


basements are just naturally cold, period. on a sunny day when the furnace is not running or it is warmer upstairs from cooking etc there is no heat being produced for downstairs by the furnace so it gets colder by the minute. if you really want some reasonable warmth you have to have a few elec baseboard htrs down there. less than 5% of our houses have cold air returns in the basement as they really don't make a difference or help IMO and experience. they then reduce the amount of circulation upstairs as you are robbing peter to pay paul.
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Old 04-01-2013, 04:38 PM   #10
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Quote:
Originally Posted by bryanp22 View Post
It has two supplies just no return. So I was hoping return would help.
A low return will help. but as Yuri said. Only when the outdoor temp is enough to run the furnace on a regular basis.

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