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Old 11-23-2011, 10:11 AM   #1
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Heating Vents to upstairs in home


What is the affect of closing heat vents to the second floor of a home?

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Old 11-23-2011, 10:59 AM   #2
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Heating Vents to upstairs in home


it would save on your heating and cooling costs

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Old 11-23-2011, 11:41 AM   #3
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Heating Vents to upstairs in home


well, heat rises so I would say that the effects would be minimal.....are you lacking heat on the first floor?
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Old 11-23-2011, 12:11 PM   #4
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Heating Vents to upstairs in home


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it would save on your heating and cooling costs
Not really.....
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Old 11-23-2011, 12:40 PM   #5
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Heating Vents to upstairs in home


I doubt that it will reduce heating costs significantly, but heat does rise, so, depending on such things as duct size, floorplan, etc., if can result in more even distribution of the heat. This can be particularly true in older homes, or in homes in which attic space has been converted to living space.
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Old 11-23-2011, 12:54 PM   #6
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Heating Vents to upstairs in home


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Not really.....

I agree. You wouldn't see a difference unless the system was zoned and the zone was closed.
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Old 11-23-2011, 01:42 PM   #7
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I agree. You wouldn't see a difference unless the system was zoned and the zone was closed.
Or replacing a furnace or other parts early that has been bouncing off the high limit.....
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Old 11-23-2011, 01:43 PM   #8
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Heating Vents to upstairs in home


if you can actually shut the second floor discharge riser and return on the duct work you would have to save on the heating rising heat or not ..shutting the registers you ar still pressurizing the duct and thats a waste of heated air cut it off asap above the first floor..if your anything supply fan is MED LO might want to drop it to LOW speed wire flip at the motor into the control board if you have one for the heating if you lock out the second floor risers
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Old 11-23-2011, 02:45 PM   #9
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Heating Vents to upstairs in home


We have one upstairs 12x8 bedroom in converted attic space. It has two 5" supplies through wall registers. It gets hot up there in summer, so these were installed as part of original A/C system. But now we have heat pump for winter heating.

I have been in two minds about closing the registers. They come right off the attic run trunks - no more that a foot or so of duct. I was concerned that we would have too high a flow through other eight registers which are already a bit noisy. I also thought sp might go up and make blower noisier (it has ECM motor and maintains cfm regardless!)

But my wife did it anyway and it seems OK. We have door to room closed, so only area warm air from below collects, is at top of stairway which has minimal heat losses. There is another bedroom below the attic room, so attic room gets partly heated from below and from upstairs hall walls. It seems to stay warm even with registers closed (but they always leak a bit)

It doesn't do any harm to experiment, so go for it!

PS: I would expect to save on heating costs if temperature in room is reduced when registers are closed.
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Old 11-23-2011, 03:16 PM   #10
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Heating Vents to upstairs in home


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PS: I would expect to save on heating costs if temperature in room is reduced when registers are closed.

You would expect wrong. All you are doing is inviting the cold closer to the unit, permeating the envelope the system was designed to absorb.
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Old 11-23-2011, 05:01 PM   #11
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Heating Vents to upstairs in home


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You would expect wrong. All you are doing is inviting the cold closer to the unit, permeating the envelope the system was designed to absorb.
Say again???

I am not sure quite what you said, but by doing what we have, we have reduced the heat loss from the house. I would expect that should reduce heat losses.

BTW - Try to be a bit more polite in way you answer.
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Old 11-23-2011, 05:06 PM   #12
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Heating Vents to upstairs in home


I am planning on shutting of the heat to the second floor of a building as I remodel this winter. Good tips. Thank you. Milo Maine
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Old 11-23-2011, 05:13 PM   #13
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Heating Vents to upstairs in home


Just make sure enough heat 'rises' to make sure no pipes freeze and theres not enough condensation on finishes to promote mold.

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