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Max BTU's

DennisDe
DennisDe Member Posts: 16
in THE MAIN WALL
Dan, I have a 2 story house that has a 6 inch flue which runs a 40K BTU
> water heater and a ( 80%) 80K BTU furnace. I am looking at installing a
> separate Air / Gas furnace in the basement which 1800 square foot. Can I
> run another (80%) 50/60K BTU furnace through the same 6 inch flue or
> should I opt for a 90%(+) 50/60K BTU gas side vent furnace.
>
> What is the maximum BTU's for a 5 or 6 inch flue?...Lastly, should I just
> let the 80% 80K BTU furnace heat the basement and install a (90%) 60/75K
> BTU gas furnace in replacement of the 80% furnace for the main level of my
> home. Main Level is 2600 square foot

Comments

  • hr
    hr Member Posts: 6,106
    You need

    a venting table to calculate the flue size. You also need to make sure you have adequate combustion air for an additional appliance. Mechanical codebooks usually have tables for this.

    Some of the high eficiency equipment has a combo vent and combustion air option.

    You may want to involve a local heating contractor for an opinion. They would be familiar with local code and any safety issues. Be hard to answer all your questions without a drive by.

    hot rod

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