My house has a late 90’s 90 plus propane furnace. Nobody ever hooked up the outside combustion air inlet so it just draws from the basement. The house is not tight, the basement is uninsulated and has cheap basement single pane windows. Do you think I should add the fresh air intake? How much would that raise the efficiency do you think? Also can someone find the manual for this furnace? It’s a comfortmaker enviroplus90. Thanks in advance!
Question about outside air for propane furnace
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It won't raise the efficiency much probably but it will help stop pulling more cold air into your home.
There's no good reason to not have the it hooked to outside air if it's able to be.
There's no good reason to not have the it hooked to outside air if it's able to be.
I figured it wouldn’t raise furnace efficiency but it would raise house heating efficiency. I have a brick exterior and would be a pain to drill a hole through.
no big deal drilling through the brick... Go to your local tool rental company they will have a drill you can rent and have the hole punched in quickly
EbS-P
Minister of Fire
I would not bother. I would Spend time and money air sealing. Once your house is tighter then yeah it’s on the list of items to tackle.
Fair point. I was able to find the manual and they want both intake and exhaust on the same atmospheric plane. My exhaust vent is on the roof and furnace is in the basement. So by their rules I need to run an intake up there so I don’t end up creating a perpetuating flow chimney in the furnace I guess.
I have the old bvent pipe sealed off and unused. I wonder if I piped the combustion air intake into that? It would be really easy to do but both pipes are next to each other and same height at roof exit.
I have the old bvent pipe sealed off and unused. I wonder if I piped the combustion air intake into that? It would be really easy to do but both pipes are next to each other and same height at roof exit.
Bad LP
Minister of Fire
My LP boiler draws sealed outside air thru the sidewall of the basement and vents thru the chimney some 30 feet up.
Wood boiler does the same thing (same intake but has a powered damper) but it is not sealed combustion.
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