Orifice Combustion Air 400 Mbh

Orifice Combustion Air 240 Mbh

Orifice Std Orifice (Propane)

NATURAL GAS STANDARD ORIFICE

Orifice Combustion Air 350 Mbh

Orifice Burner Size 27

Orifice Burner Size 20

Orifice Burner Size 16

Orifice Burner Size 11

Orifice Burner Size 48