From the duck blind to the garage, these handy heaters can be used anywhere you need a boost of warmth to enjoy yourself or to just get the job done. They run on propane from a bulk tank, and all have electric spark ignition (except triple) and three-position (Hi-Med-Low) regulator. Triple Burner Heater can run one, two or three burners at a time with a maximum of 42,000 BTU. Double Burner can operate one or two burners at a time with a maximum of 28,000 BTU. Single Burner has a maximum of 14,000 BTU. Safety shut-offs and soft-nose P.O.L. Available: Single Burner, Double Burner, Triple Burner. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Heaters.