Heater 30K Vent Free Blue Flame Propane Heater with Blower. Brand New in Original Packaging. 30,000 BTU per hour. Heats up to 750 square feet. For use with liquid propane. Blue flame burner for even convection heat. Quiet integrated blower for gentle circulation of heated air. Thermostat for automatic temperature control. Automatic low oxygen shut-off… Read the full article