Gas and Oil Home Heating Furnaces - can i add h/ac vents from existing

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dlw
02-22-03, 06:11 PM
I purchased a multi-level home built in 1950 in Mt. Orab, Ohio. There was a M.BR. , and Bath addition added 10 years ago. Neither has a vent, or for that matter the duct work going to them. The closest duct/vent on the floor in a bedroom on the next level approximateley 5' higher than my floor, but 3' lower than my ceiling. I would like to remove the floor vent, in that bedroom continue up the wall with the duct work thru the ceiling into the attic, and put vents in both rooms in the ceiling. Also I have a question about the flexible ducts, and are their blowers to increase air flow if I do this? My house is approximately 1800Sqft. My furnace and a/c are 150,000 btu's, will it work?

Thanks in advance
daren

GregH
02-23-03, 07:03 AM
daren:

If you try to extend the duct you mentioned there will likely not be enough airflow to supply the rooms needs.
What needs to be done is to add another duct and it will have to originate from the plenum or at least the main trunk.
You may have to get creative in your routing, but I'm sure it would be possible.

Duct fan boosters are available but they don't work as good as they look.
They are generally very poorly constructed and have a short lifespan. There is also the need to wire them and install a control of some type to cycle it.
Flexible ducts work fine if sized properly. If you are hiding them in a wall you have to be sure they are secured properly and don't get pinched.

Another option if it is deemed to be impossible to run proper ducts are electric baseboards.