I have a bathroom I'm remodeling, and the current heat vent is attached to a meandering ~10' run of round duct which originates from the trunk of the furnace (located next to this bathroom in the laundry room). The vent needs to be removed because of a change I'm making to cabinets. Can I attach the new vent directly to the supply trunk (which runs right above this room), or is it important that I provide a run of round duct for some reason?
The bathroom is small (6'x11'?), and with the furnace nearby, I imagine putting a supply vent directly onto the supply trunk could result in a lot of hot air coming in due to pressure. Can I solve that by using a small vent?
Best Answer
That should be fine (I've seen it done many times in basements), with a few caveats:
You're right that there will be more flow with that setup than with a length of round duct. Add to that the smaller room you're feeding, and you can see that you'll need to dampen with an adjustable vent.
By doing so you may introduce noise. You have a shorter sound path from the furnace itself, and adding a damper vent will likely cause white noise at that location as well.