This Mr. Heater propane tank top radiant heater provides a quiet operation with a minimum maintenance. It features Hi-Medium-Low regulator and safety shut-off function. It has heat outputs of 8,000-12,000-14,000 BTUs. This unit uses manual ignition, reaches its full heat output in seconds, and requires no electricity to run. It has no noisy blowers or moving parts and is made of rugged durable materials.