Offered as a complete do-it-yourself kit, this ABYC-compliant heater runs quietly and operates up to 20 hours on a single gallon of fuel. Kit includes heater and controller, fuel pump in enclosure, ducting, connectors, thru-hull exhaust fitting, fuel line, exhaust water trap, mounting bracket and hardware plus documentation. The Air Top 2000 ST is the smallest air heater on the market. It offers excellent heat output and optimal economy. Warranted for two years of operation.