This high-efficiency 80,000 BTU portable heater delivers powerful heating performance for construction sites and temporary spaces. Featuring dual-fuel capability for both propane and natural gas, it provides 99% fuel efficiency with 450 CFM airflow for rapid temperature control. The enclosed flame design ensures safer operation while allowing heat to be ducted up to 12 feet, making it ideal for heating tents, construction areas, and emergency shelters. With thermostat control and multiple safety features, this unit combines versatility with reliable performance in demanding environments.