Original 540-Degree 45,000 BTU Tank Top Radiant Propane HeaterThis Blue flame 10,000 BTU natural gas vent free heater is the perfect supplemental heating solution even on the coldest days. The unit is equipped with a multi-output valve for easy temperature regulation and a convenient piezo ignition built right into the rotation of the knob for one handed ignition. It can be permanently mounted to the wall or securely fastened to the floor with included mounting brackets and fasteners. The clean burning Blue flame tube burner uses the natural convection of the burn to circulate warm comfortable air. With a factory standard oxygen depletion sensor (ODS), rest assured this heater will provide you with years of comfortable and safe heat.Mr. Heater F232000 MH9BX Buddy 4,000-9,000-BTU Indoor-Safe Portable Propane Radiant Heater, Red-BlackNorth America's Most Popular Portable Propane Heater! This patented radiant 4,000-9,000 BTU Liquid Propane heater connects directly to a 1 lb. cylinder and is the perfect solution for heating enclosed spaces like large tents up to 200 sq. ft. The expertly engineered size to BTU ratio is augmented with a fold down handle to give this heater maximum output while retaining a minimalistic footprint. A swivel regulator gives you the ability to adapt usage from a disposable cylinder to a remote gas supply with the purchase of a hose and filter. To light the unit, simply rotate the knob to pilot and push. Then the integrated Piezo sparking mechanism will take care of the rest. With the Oxygen Depletion Sensor (ODS) and accidental tip-over safety shut-off you can be sure that you will enjoy years of comfortable indoor safe heat.*WE ARE NOT ABLE TO SELL THIS PRODUCT TO CANADA AND MASSACHUSETTS* **Please note when operating the heater at altitudes over 7,000 FT above sea level the heater may shut off. Use- Emergency Heat, Tents, Campers, Workshops, Job Sites, Porches, Patios, Decks, Garages, Storage Buildings, Picnics, Tailgate Parties, Construction Trailers, Sporting Events, Barns, Sheds, Hunting Blinds, Shelters, Ice Fishing Shanties.The product voltage arrange is 110V.