2015 (unverified) Frost Fighter IDF-500 500,000 BTU Space Heater in Fairmont, West Virginia, United States (IronPlanet Item #4850740)
Indirect Fired 500k BTU Portable Heater System with Power Meter and Fan Bypass Switch(OIL/DIESEL) 20 amp - IDH500QRM-OIL from FROST FIGHTER | Acme Tools