This In-Line Heating System with its propane-fired, heat-exchanger provides safe, warm breathing air during cold conditions. For tent/shelter or confined space heating. Airflow can cycle with heat or run continuous for confined space ventilation. Remote thermostat included. Up to 10 hours of continuous operation with standard propane cylinder tank. Heater attaches quickly and easily to blower. Output: 70,000 BTU/13.5kW. Includes propane regulator and connection assembly. Easy access top mounted heater control panel. IP20 rated enclosure. 15'/4.6m power cord with IP65 rain tested switch enclosure.