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retro-fitting gravity feed supply vents


Posted by Nancy on January 15th, 2001 09:39 AM

Any ideas on an efficient way to retro-fit the supply
vents on what was the original gravity feed system in my
1926 bungalow? The current vents are HUGE (15" x 30").
Air flow is getting tricky with a new forced hot-air
furnace and additional ducts added on the the first
floor. To make matters worse, in the original gravity
feed system the return ducts were placed immediately
next to the supplies (returns on the floor; supplies on
wall), so the returns are apt to suck hot air back
into the furnace -- not good.

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