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Directory Results for Indirect Fired Furnace to Indirect Fired Gas Heater IFG OA RA. Model IFG indirect fired make-up air heater indoor unit (100% OA or 100% RA).13 models IFG-109-SM, IFG-109, IFG-110, IFG-112, IFG-115, IFG-209-SM, IFG-209, IFG-210, IFG-115, IFG-118, IFG-120 and IFG-120-HD.

Indirect Fired Furnace
Indirect Fired Gas Heater IFG OA RA. Model IFG indirect fired make-up air heater indoor unit (100% OA or 100% RA).13 models IFG-109-SM, IFG-109, IFG-110, IFG-112, IFG-115, IFG-209-SM, IFG-209, IFG-210, IFG-115, IFG-118, IFG-120 and IFG-120-HD.