Outside air vent.

[flcruising]

Would it be a bad idea to block off the outside air duct that connects to our furnace? We're all electric.

[Greg]

If you are totally electric heat it should be ok to stull the duct with insulation. The duct is designed to take outside air in for combustion in a gas or oil furnace. Greg

[SpongeBob]

Hi Aaron,
If the furnace is offline completely go ahead as Greg said and stuff it. However, if it still in running condition, put a post-a-note in an obvious location so that the next person who tries to operate it will know what you have done. Just another layer of safety and only takes a moment.
-Bob

[flcruising]

This is a new house, and there's never been gas installed. Our owner's information mentions a passive whole house ventilation system, which I'm assuming is refering to this outside air duct. I don't see a need to heat/condition outside air, am I wrong? Yes, this furnace is in use too.

[Robert]

Hi,


Is it a flex duct coming down from roof and connecting to front or rear of furnace at midway point just above blower motor housing ?



If so, it is for mixing fresh outside air with the return air in home to keep it fresher and less stale.


The blower motor pulls the air in through a roof vent and down the flex duct when blower is running.


It doesn't effect the Furnace and is best to leave open.



Thanks,
Robert