Comfort Glow Blue Flame Vent-Free 30,000 BTU Gas Heater for Indoor Use, Dual Fuel (Natural Gas or LP), Thermostat, 1,250 Sq. Ft. Heat, Electric Ignition, 99.9% Efficient. This Comfort Glow Blue Flame Vent-Free Heater is a powerful and efficient (propane or natural gas) heater for indoor use, delivering 30,000 BTUs to heat to areas up to 1,250 sq. ft. With its "dual fuel" technology, this heater can be easily converted from natural gas or LP (liquid propane) It provides flexibility for various spaces like homes, small garages, and offices. Its ambient blue flame is an effective heat source that also provides a relaxing focal point, making it a reliable space heater that operates without the need for electricity. This ventless gas heater is 99.9% fuel efficient, makes it a great zone heating option by only heating the areas used most often. Zone heating can save up to 30% on home heating costs. It is simple to install, requiring no external vents. Equipped with safety features such as an Oxygen Depletion Sensor (ODS) and over-pressure safety device, it offers peace of mind. The built-in thermostat allows easy heat control, and the electric ignition ensures hassle-free operation. With compact dimensions, it's the perfect heater for indoor in most rooms. Heater comes ready for wall mounting. If wall mounting isn't an option, the floor Mounting Kit #20-5345 (sold separately) converts it to be placed on the floor. Optional Accessories sold separately: LP INSTALL KIT: #20-7010 Includes 1/2" gas flex connection, 3/8" & 1/2" adapter fittings and pipe sealant. BLOWER: #620-6127 Moves air throughout the room Blower requires a 120V Grounded Outlet and is thermostatically controlled. Fits all KozyWorld and Comfort Glow Infrared models above 10,000 BTU's, produced in 2015 or later.