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Indoor Separated Combustion (DFS)

The indoor separated combustion duct furnace was designed as a building's primary room heating source and is certified for, non residential, commercial applications only. Separated combustion duct furnaces are specifically designed for buildings with hostile atmospheric conditions such as high humidity, contaminated indoor air or rooms with negative pressure. Available in 11 power exhausted model sizes, the unit covers a wide variety of applications. Inputmore
Unit of Measure

Standard Features

 - 115V control step down transformer with 24V gas controls  - 20 gauge aluminized steel cabinet  - 409 stainless steel drip pan  - 409 stainless steel heat exchanger and burners  - 80% thermally efficient  - C.S.A. certification for use in the US and Canada  - Certified to 3.0" W.C. external static pressure  - Differential pressure switch for proof of combustion air  - ETL certification  - High limit safety control  - Left side (when looking into the discharge) access to burner    and gas controls with slide-out burner drawer  - Natural gas input  - Power exhauster motor  - Power exhauster relay for pre-purge and post-purge  - Separate electrical, venting and gas control access with fully    gasketed doors  - Separate line voltage and low voltage terminal strips  - Side or bottom gas connection access  - Single stage intermittent pilot with continuous retry control    system for operation on natural gas.  - Two-stage gas valve

Optional Features

 - Adjustable differential air flow proving system  - Building management compatible gas controls for    modulation control using a 0-10 VDC or 4-20 mA input  - Control relay - double pole, double throw  - Fan delay timer  - Gas control step down transformers for 208/230V/1Ph and    208/230/460/575V/3 Ph  - High and/or low gas pressure switches  - Manual reset high limit switch  - Mechanical modulation and electronic modulation controls    for natural gas  - Multiple furnace electronic amplifier for controlling up to 4    duct furnaces with one discharge air sensor  - Right side access to burner and gas controls  - Single stage intermittent pilot with retry control system for    operation on propane gas  - Supply air fire stat  - Timed freeze protection  - Two-stage, mechanical modulation, and electronic    modulation controls for propane gas

Gas Connection Pipe Size

1/2 in

Approximate Unit Net Weight

230 lb

Approximate Unit Shipping Weight

325 lb
  • 1 Dimensions are subject to change without notice
  • 2 Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-400). Exhaust pipe installed over collar. Combustion air pipe installed inside collar.