The smallest blown hot air  heater on the market, the Porpex Heatsource HS2000 thermostatically controlled air blown heating system is one of the quietest combustion heaters in production. Due to the design and efficiency of the stainless steel burner and heat exchanger, output is high, The Propex Heatsource HS2000 combustion is clean and all waste products are exhausted externally. Designed for reliable, maintenance-free operation and fast warm-up time. Airflow sensing detects blocked or restricted flue pipes. Self-diagnostic fault finding. 2000w. Operates on propane / butane gas.