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Old 01-27-2016, 05:53 PM   #1
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Location: Tyler, TX
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Question Heating question..Crusader

Have a 321RES; wondering if there might be any consequences if I block off one of the floor registers when heating; understand to never block return air, just wondering about any other issues. Thanks.

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Old 01-27-2016, 06:06 PM   #2
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We have 325RES - same as yours with J Shaped kitchen instead of island

We changed our floor vents to the adjustable ones

We close the bedroom one since it gets too warm up there and it forces more air to living area

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Old 01-27-2016, 06:09 PM   #3
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You could cause the furnace to over heat which is called limiting where the thermistor opens to prevent a meltdown of the furnace. The furnace requires a certain amount of air flow to keep the burner chamber at a safe temp. My furnace was limiting from excessive ducting tube in the bathroom. It does not take much to cause it. My advice is to not cover a register.

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Old 01-27-2016, 06:13 PM   #4
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We do not cover any registers ...only adjust the louvers slightly closed

They do not completely close anyway even if we wanted to...
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Old 01-27-2016, 06:31 PM   #5
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It may not even light. If you close one register, you may reduce air flow enough that the sail switch won't pick up and the furnace won't light at all.
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Old 01-27-2016, 08:11 PM   #6
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I partially blocked ducts on my 28rl. Air takes the easiest path. Partially blocking one register to get more flow out of other registers is fine. I used steel wool in the ducts near the furnace. I also used aluminium duct tape to seal the air loss on the furnace duct connections. This helped eliminated short loop of hot air into the furnace return air to prevent over heating of the furnace.

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