Monday, July 27, 2015

Does HVAC need to be able to breathe?

Before you downvote me - we bought a house, where the furnace and boiler are in the basement and about 4/5 the way walled off. We want to put in a door with a high-up latch so that the small children won't go back there and mess around.

When we moved in, our inspector told us to seal up a vent someone had put in the return duct next to the furnace. Something about the prev owner trying to draw cool air into the system during the summer. There was a baffle with markings, "Summer ← Winter ↑". Inspector said that's a big no-no; could draw ambient gas from around the furnace back into the ducts.

So, we want to put a door in, and given what the inspector said, I'm assuming that we don't want the door to go all the way up to the ceiling or close off the furnace area entirely - shouldn't any fumes be able to dissipate?

Then again, I've been in homes where the furnace and boiler are in the basement and closed off in a room - but I'm not sure if there are extra ventilation needs if you do that.

Lil help, b/c we are hiring a carpenter to build the door, but they probably will not have HVAC expertise.

Thanks!

EDIT: not a normal door situation; unusual size opening, one side is wood, one side is concrete, top is a steel beam. That's why we need someone to build us a door.

submitted by jseego
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