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Specifications and dimensions are for reference only and are subject to change without notice. Optional equipment may affect dimensions and weight. IDF-21 D 4,200,000 BTU/HR 21,000 CFM INDIRECT FIRED IDF-21 D HEATER SPECIFICATIONS Burner capacity 4,200,000 BTU/HR Airflow 21,000 CFM Firing Indirect Fired, Forced Draft, Lo-Hi-Lo Fuel #1 & #2 Diesel Fuel, Natural Gas or Vapor Propane Gas Pressure 2 PSI Minimum, Specify Available Gas and Pressure When Ordering Power 208-240 Vac / 3 Phase / 60 Hz 480 Vac / 3 Phase / 60 Hz Full Load 55A @ 240V / 3 Phase 28A @ 480V / 3 Phase Air Discharge 32” Diameter Discharge Temp. 200°F @ 0°F Ambient Weight 19,310 Lbs. dry (varies based on configuration) Dimensions 384” L x 95” W x 114” H without stack Models DO – Oil Burner, DG – Gas Burner and DGO – Duel Fuel, Gas and Oil C US C US STANDARD EQUIPMENT • Heavy Duty Welded Construction • Powerful Backward Inclined Blower • Artic Wiring Designed for -80°F • Service Panel with Indicator Lights for Heater Functions • Oil Field Skid with Fork Pockets • Stainless Steel Fire Tube • Heated Walk-in Burner/Blower Control Room with Lights • Fireye Flame Safety Control with Purge Cycle • Discharge Temperature Control with High Temp Shutdown • Air Proving Switch • Safety Disconnect Switch • Heavy Duty Fuel Filter (Oil Models) • 50’ Remote Thermostat OPTIONS • Duel Fuel (Gas and Oil) or Heavy Oil Burner • Vaporizer • High Pressure Gas Hose • Rigid or Flexible Ducting • Insulated and Non-Insulated Ducting • Specialty Paints and Coatings • Explosion Proof Thermostat • Various Voltages and Frequencies • Air Circulation Fans from 8,000 to 26,000 CFM
