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The system will provide FRESH warm air at a temperature rise of 80 degrees over ambient, and a flow of 500 CFM. The 70,000 BTU’s is enough to warm tents, shelters, extrication victims, and for ice rescue operations. The systems come complete with a powerful 8″ blower, a CGA approved heater, the hose, gauge and regulator to connect the heater to a propane tank, and 25 ft. of duct to deliver the warm air where you need. Both the blower and the heater require 115 Volts A.C. to run.