Steam boiler

John Shea

with not enough (according to mfg specs.) fresh make-up air?

Ken_8

Oil or Gas

? Residential (under 300M) or commercial (over300M)?

In a closet or wide open basement?

Power burner or atmospheric?

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Al Letellier

not enough makeup air

things like soot, smoke, improper combustion, carbon dioxide, to name a few. To have fire you must have fuel, ignition and oxygen. Miss one or have too little of one or the others and you have incomplete or no fire.

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John Shea

Oil or Gas

Gas burner. 1,500,000 output.

Basement boiler room. IIRC the Peerless manual calls for about 4 sq.ft. each for intake (floor) and exhaust (near ceiling).

The boiler room's always had a 3sq.ft.(approx.) grill within a couple inches of the ceiling. Nothing down low.

The boiler room door isn't real drafty. Maybe I should ad a grill in the door? The rest of the basement is quite large.

Thanks for your response, Ken.