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Old 12-13-2010, 10:00 AM   #1
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best way to shut off forced hot air heat to one room


Hi all,

My house has 4 bed rooms. One of them is used about 2 times during the winter heating months. I figured to save some money, I would shut off heat to that room then turn it on when guests arrive. The HVAC system has flexable supply line that goes to the room. There is a damper in the line in the attic. I close the damper and the room stays cool and I keep the door closed.

Now my question. The room also has a return line which has no damper. Is it fine that the my heater is pulling the colder air from that room? Or am I not saving any money as I need to heat that cool air to redistribute to the rest of the house. Would I be better to somehow block off that return line? If so how? Or am I over thinking this.

Thanks for any replies.

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Old 12-13-2010, 10:13 AM   #2
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best way to shut off forced hot air heat to one room


Duct systems are almost always undersized to say the least. When you close of any run it could do more harm than good to your equipment. So I guess my answer is never close off any runs on a system unless you know for sure your equipment can handle the lesser air flow.

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Old 12-13-2010, 11:59 AM   #3
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best way to shut off forced hot air heat to one room


Quote:
Originally Posted by liquidvw
Hi all,

My house has 4 bed rooms. One of them is used about 2 times during the winter heating months. I figured to save some money, I would shut off heat to that room then turn it on when guests arrive. The HVAC system has flexable supply line that goes to the room. There is a damper in the line in the attic. I close the damper and the room stays cool and I keep the door closed.

Now my question. The room also has a return line which has no damper. Is it fine that the my heater is pulling the colder air from that room? Or am I not saving any money as I need to heat that cool air to redistribute to the rest of the house. Would I be better to somehow block off that return line? If so how? Or am I over thinking this.

Thanks for any replies.
Correct also the inside walls don't have insulation never close off vents
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