Indoor Gravity-Vented Gas-Fired Duct Furnace

• ETL certification for commercial and industrial use in the US and Canada.
• Aluminized steel cabinet with duct flanges for easy ductwork connection.
• 81% minimum thermal efficiency over a 20 to 100°F temperature rise range for fuel savings.
• Patented aluminized-steel dimple-tube clamshell heat exchanger for maximum heat transfer (409 stainless steel optional).
• Blocked vent safety switch to verify proper venting
• Gravity vented with a 45° angled round vent connection for tighter ducting
• Heat exchanger certified to withstand 3.0″ W.C. external static for use in systems with long duct runs or high static accessories.
• Aluminized steel burner with stainless steel separator strip (409 stainless steel optional).
• Right-hand control access (left hand optional) with slide-out burner access.
• Single-stage gas controls (two-stage, electronic modulation, or building management controls using a 0-10 Vdc or 4-20 mA input, optional).
• Automatic reset high limit safety control (manual reset optional).
• Intermittent pilot ignition with the continuous retry control system.
• Control the terminal board and low-voltage terminal connections.
• Gas control step-down transformer with 24V gas controls.
• 4-point mounting with threaded rod (by others).
• Designed, Engineered & Assembled in the USA

• Two-stage or electronic modulation controls for either natural or propane gas
• Building management compatible gas controls for modulation control using a 0-10 Vdc
• 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 supply voltages
• Left side access to burner and gas controls
• Adjustable differential air flow proving system
• Fan delay timer
• High and low gas pressure switches
• Timed freeze protection
• Supply air fire stat
• Control relay – double pole, double throw
• Separate line voltage and low-voltage terminal strips
• Premium control box and gas control string

Field-Installed:

• Single and two-stage programmable heat/cool room thermostats
• Electronic two-stage duct thermostats
• Electronic modulating room and duct thermostats, and a room override for the duct thermostat
• Smoke detector
• 7-day digital time clocks
• Summer/winter switch
• Condensate connection drain kits
• Pipe hanger adapter kits

Ideal for providing heated supply air in commercial and industrial environments, the DFG series is designed for use with standard air handling systems in air conditioning, heating, or makeup air applications. Common applications include:

• Commercial Office Buildings
• Institutional Facilities
• Mechanical rooms
• Gymnasiums
• Multi-Purpose Rooms
• Cafeterias / Kitchen Hoods
• Lab Exhaust Hoods
• Bathroom / Locker Rooms
• Paint / Welding Booths