Home>Discussions>INSULATION & HVAC>Conventional gas furnace: Can I remove this cold air return duct?
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rickpantel
Conventional gas furnace: Can I remove this cold air return duct?

I have a question for the HVAC experts on this forum:

We live in a circa 1950's house with a conventional gas-fired forced air furnace. We are planning a total reno of the house in a few years, at which time the entire HVAC system will be upgraded. The existing furnace has a large cold air return duct drawing air from a 400 sq' room adjacent to the furnace area (see photo, arrows). This duct only returns air from this room. The duct is big, ugly and in the way of some ceiling work that needs to be done.

Interestingly, this duct runs immediately adjacent to another cold air return from another part of the house, but bypasses it and hooks into the main cold air plenum of the furnace.

I would like to remove it. Is there any reason why I could not connect it to the existing cold air return, and remove the majority of the redundant ducting? :confused:

canuk
Re: Conventional gas furnace: Can I remove this cold air return duct?
Quote:

I would like to remove it. Is there any reason why I could not connect it to the existing cold air return, and remove the majority of the redundant ducting?

You should be able to connect the air return for this space to the main cold air return trunk that likely runs along that room's ceiling.

Hopefully the return duct for that room is run down a wall and not simply opened at the ceiling.

rickpantel
Re: Conventional gas furnace: Can I remove this cold air return duct?

Hey Canuck:

Thanks for the quick reply.....

Yes, the intake for the room is down at floor level. It runs inside the wall (I suspect between the framing studs) to the top, where it exits into the huge, honking pipe that you see in the photo.

I think I will just remove this entire pipe, and hook it up to the main cold air return. There is going to be a gas insert into the fireplace, so likely we will have all the vents to that room shut off anyway, since we will be getting heat from another source. We won't need much airflow (hot or cold) anymore.

There is no way this furnace is properly sized or airflow balanced for the house anyway...it is a sloppy installation. I doubt I'll be making things worse.

Thanks for the answer. :)

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