Indoor Separated Combustion Duct Furnaces
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Indoor Separated Combustion (DFS) Gas Duct Heater
For Space Heating For Dehumidification Systems
 The indoor separated combustion duct furnace was designed as a building’s heating system. Separated combustion duct furnaces are specifically designed for buildings with hostile atmospheric conditions, such as high humidity, or negative pressures. Available in 11 power exhausted model sizes, the unit covers a wide variety of applications. They have input ranges from 75,000 to 400,000 Btu/Hr and can operate on either natural or propane gas. The airflow direction can be specified when ordering the unit. The duct furnace is certified for location downstream from dehumidifier and has a drain pan that allows connection to a condensate drain line.
Indoor Separated Combustion Duct Furnaces Standard Features:
- C.S.A. certification for use in the US and Canada
- ETL certification
- 80% thermally efficient
- Power exhauster motor
- Separate electrical, venting and gas control access
with fully gasketed doors
- 20 guage aluminized steel cabinet
- 115V control step down transformer with 24V gas
controls
- 409 stainless steel heat exchanger and burners
- 409 stainless steel drip pan
- Certified to 3.0” W.C. external static pressure
- Single stage intermittent pilot with continuous retry
control system for operation on natural gas
- Differential pressure switch for proof of combustion air
- Power exhauster relay for pre-purge and post-purge
- Separate line voltage and low voltage terminal strips
- Left side (when looking into the discharge) access to
burner and gas controls with slide-out burner drawer
- Side or bottom gas connection access
- High limit safety control
- Two-stage gas valve
- Natural gas input
Indoor Separated Combustion Duct Furnaces Optional Features - Factory Installed
- Single stage intermittent pilot with retry control
system for operation on propane gas
- Two-stage, mechanical modulation, and electronic
modulation controls for propane gas
- Mechanical modulation and electronic modulation
controls for natural gas
- Building management compatible gas controls for
modulation control using a 0-10 Vdc or 4-20 mA input
- Multiple furnace electronic amplifier for controlling up
to 4 duct furnaces with one discharge air sensor
- Gas control step down transformers for 208/230V/1Ph
and 208/230/460/575V/3 Ph
- Right side access to burner and gas controls
- Adjustable differential air flow proving system
- Fan delay timer
- High and/or low gas pressure switches
- Manual reset high limit switch
- Timed freeze protection
- Supply air fire stat
- Control relay - double pole, double throw
ALL PRINTED INFORMATION SHOWN SUBJECT TO CHANGE WITHOUT NOTICE
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