WOW! Frost Fighter IDF350 and IDF500 (350 000 and 500 000 BTU)  The perfect solution where clean, dry heat is required to complete a project on time and within budget. Ductable up to 50ft. Stainless Steel Heat Exchanger, Satin Coated Steel, Powder Coated Paint, LED Polarity Lighting, High Limit Safety Switch, 6-Ply Pneumatic wheels, Adaptable Duct Connection, 3-Trials for Ignition (LP/NG) and Ball Valve Switchover from propane to Natural Gas (LP/NG). Used but perfectly fonctionnal. Only $3,495. Many unit available.