Secondary Combustion Air

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Mtn Fire

New Member
Dec 12, 2011
20
New Mexico
Hello all,

On the home-built Garn style boilers do they us a second air source for the secondary combustion refractory chamber? Or does it get combustion air from the firebox?

If so, what is the approximate size of "nozzle" per 100,000 btu?

thanks in advance,
 
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