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Duct Furnaces

Indoor Gravity/Power Vent

Modine's indoor duct furnace line was designed for use with a building's heating, heating/cooling and make-up air systems. Available in 11 model sizes, in both gravity (DFG) and power vented (DFP) configurations, the units cover 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 either upstream or downstream from cooling coils and has a drain pan that allows connection to a condensate drain line.

  • ETL certification for use in the US and Canada
  • 80% thermally efficient
  • Blocked vent safety switch (model DFG only)
  • Factory installed power venter with differential pressure switch for proving proper venting (model DFP only)
  • 20 gauge aluminized steel cabinet
  • 115V control step down transformer with 24V gas controls
  • Aluminized steel heat exchanger
  • Aluminized steel burner with stainless steel separator strip
  • Certified to 3.0” W.C. external static pressure
  • Single stage intermittent pilot with continuous retry control system for operation on natural gas or propane gas.
  • Right side access to burner and gas controls (when looking into the discharge) with slide-out burner drawer
  • High limit safety control
  • Control terminal board

  • 409 stainless steel heat exchanger and burner
  • 409 stainless steel drip pan
  • 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 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 supply voltages
  • Left 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
  • Installed thermostat - two-stage
  • Separate line voltage and low voltage terminal strips
  • Premium control box and gas control string