Question by John L: How can I run added duct work from my house furnace to heat my attached garage?
I ran ductwork from my gas furnace through the main plenum, across my basement, through a cement block wall into my attached garge. I also installed a booster fan to help pull the heat into the garage, but have very little air flow into the garage. The other ducts that branch from this main duct (plenum) have excellant air flow. Where did I go wrong?
The new duct measures: 8″ X 31/2″. I had to choose this size duct as I wanted to fit flush or above the floor joices. Please advise?
Answer by face9202004
Your furnace may not be big enough to handle the additional load. It may also be as simple as closing a few dampers in order to increase the air flow.
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