12
*Minimum dimensions of 3‐in. (76mm)
NOTE: Use any of the following combinations of openings:
A & B, C & D, D & E, F & G
L12F012
Fig. 6 -- Air for Combustion, Ventilation, and Dilution for
Outdoors
* Minimum opening size is 100 sq in. (64516 sq. mm) with
minimum dimensions of 3‐in. (76mm)
{ Minimum of 3‐in. (76mm) when type‐B1 vent is used.
L12F013
Fig. 7 -- Air for Combustion, Ventilation, and Dilution from
Indoors
59SC2C
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