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temp varies b/w rooms by 1-2C - normal?

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  • Apr 17th, 2011 8:14 pm
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Member
Mar 12, 2011
317 posts
6 upvotes

temp varies b/w rooms by 1-2C - normal?

hi:
the temp readings across the 4 bdrms in our new house vary between 1-2C (it's 5C outside, prolly would have a wider variation during midst of winter when temps go -10C?).

for example:
the warmest room (smallest and only 1 window) = 21.7C
the coldest room (2nd largest but above garage and has most/largest windows) = 20.0C

is this "normal" and to be expected?

im quite sure there was spray foam insulation on the space/cavity btwn the garage and the "coldest" room but i guess this was not enough? is there any other remedy to make the temps more uniform? we're thinking of rebalancing our furnace vents as well so maybe we can ask them to "rebalance" a bit more warmer air to the coldest room? (yet to be done and the builder recognized this as one of the vents doesnt blow air out).

thanks for any insights/thoughts
10 replies
Deal Addict
Aug 20, 2007
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Kitchener
A variance of one or two degrees as you are mentioning is expected and normal. Some rooms might have more air flow due to less restrictive air ducts, ie less elbows, or lack of tape in the joints which cause a little bit of variance. If the insulation in the garage was not enough then you would be off by more than 1 degree.
Member
Mar 12, 2011
317 posts
6 upvotes
peelhic wrote: A variance of one or two degrees as you are mentioning is expected and normal. Some rooms might have more air flow due to less restrictive air ducts, ie less elbows, or lack of tape in the joints which cause a little bit of variance. If the insulation in the garage was not enough then you would be off by more than 1 degree.

thanks. how much tolerance is then allowed/possible for such things? 5 degrees? ive read of some houses having really cold rooms above garages...
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Oct 16, 2008
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Vaughan
Room facing south is warmer than north. The middle room is warmer due to heat loss. Room above garage is always colder.
Deal Expert
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Mar 23, 2009
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Toronto
Yes that's normal.

To compensate for temp variation in my gas-fired forced air heating home, I put electrical baseboard heating in a couple of the guest rooms. They're in the basement so 1-3 degrees cooler, but we keep our home cool to begin with, and the guests are often elderly and like it warm.
Deal Expert
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Dec 12, 2009
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Try to play around with the registers so that less air goes to the rooms that are warmer. Hopefully that will minimize the temperature variation.
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Mar 25, 2003
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Markham
teoconca wrote: Room facing south is warmer than north. The middle room is warmer due to heat loss. Room above garage is always colder.

is properly insulated the room above the garage can be nice and warm
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Deal Guru
May 29, 2006
10930 posts
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our family room is above the garage, its not cold at all, my garage is fully insulated and drywalled, and doesnt go below zero in fridged edmonton.
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Mar 27, 2011
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Nowhere
Completely normal. Be happy the variance is so low.

Our master is half above the garage but also happens to be the furtherest away from the furnace.
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Dec 27, 2007
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Markham
This is normal, and very good. 4-5 degrees F is average.
Member
Mar 12, 2011
317 posts
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bririp wrote: This is normal, and very good. 4-5 degrees F is average.

thanks bririp. are you referring to 4-5C differential or 4-5 degrees Fahrenheit as being average?

thanks to everyone as well... seems like so far, so good on room temp variations. i thought that 2C variance was large but i guess not...

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