The Clam CH-10000vh Portable Propane Radiant Heater is the ultimate in portable heaters for the sportsman. This incredibly durable heater is rugged built for the ice fisherman, but excels in all situations where a portable heater is required. This portable heater has a maximum BTU of 10,000 and is an industry first propane heater with a variable heat range! No more being cold on low power and shedding all your layers on high. With the Clam CH-10000vh you have full control of the temperature in your shelter. This unit has a fully adjustable output ranges of 5,500 to 10,000 BTU. The CH-10000vh also has a dependable electronic ignition, starting your heater has never been easier. The Clam CH-10000vh can utilize a disposable 1 lb. propane cylinder or can be attached to a refillable tank.