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Old 01-29-2014, 10:51 AM   #1
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Cold air return on floor Q's


My house was built in the 50s and has central heating and a/c. All of the cold air returns are located on the floor under windows. So i assume the system was geared towards heating since the returns will collect the cold air off the floors from the windows.

We are looking to build an addition and i'm wondering if i should keep the same type of system (place the returns on the floor). All new builds i see have the returns high on the wall. Are there any rules that say you must have the returns on the wall? (i'm in Ontario). Thanks in advance.

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Old 01-29-2014, 04:54 PM   #2
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Cold air return on floor Q's


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Originally Posted by cornation71 View Post
All of the cold air returns are located on the floor under windows.
That is backwards.
Supply to the exterior; return on the interior.
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Are there any rules that say you must have the returns on the wall?
Nope; but it does make sense to *also* have high returns.

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Old 01-29-2014, 06:59 PM   #3
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Cold air return on floor Q's


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Originally Posted by TarheelTerp View Post
That is backwards.

That was done for a while in the 50s. The thinking was to keep the cold air from entering further into teh room. They found out it didn't work well.

Supply to the exterior; return on the interior.
Nope; but it does make sense to *also* have high returns.
High or low won't make much difference as long as the correct supply registers are used.
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Old 01-30-2014, 09:35 AM   #4
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Cold air return on floor Q's


The main floor addition will be an open concept 16x24 room. Would one return be enough? I was toying with the idea of having a high and low return in that room where i could shut the upper return in the winter and vice versa in the summer.
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Old 01-30-2014, 04:39 PM   #5
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Cold air return on floor Q's


1 wall cavity won't be enough return. Will need to use 2 wall cavities.
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Old 01-31-2014, 01:59 PM   #6
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Cold air return on floor Q's


I've never seen return registers on the floor or under windows.
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Old 02-04-2014, 03:41 PM   #7
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Cold air return on floor Q's


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I've never seen return registers on the floor or under windows.
They're in almost every house in my area. Houses built around the 1950s.
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Old 02-04-2014, 08:08 PM   #8
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Cold air return on floor Q's


Quote:
Originally Posted by TarheelTerp View Post
That is backwards.
Supply to the exterior; return on the interior.
Nope; but it does make sense to *also* have high returns.
Thats the way things were done back in the day.

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