🔥 Heat Up Your Space, Elevate Your Comfort! 🔥 Rest easy with a 3-year parts warranty and a 10-year heat exchanger defect guarantee. Easily access thermostat and gas connections from outside for hassle-free operation. Seamlessly switch from natural gas to liquid propane with the included conversion kit. Experience a blazing 50,000 BTU output, perfect for expansive spaces. Enjoy the flexibility of vertical or horizontal venting to suit your setup. 1250 sq. ft. 50,000 BTU Easy install The Mr. Heater F260550 Big Maxx MHU50NG is a powerful natural gas unit heater designed to efficiently heat areas up to 1250 sq. ft. With a robust 50,000 BTU output, it features versatile venting options, easy access for installation, and a conversion kit for added flexibility. Ideal for garages and large indoor spaces, it comes with a solid warranty for peace of mind.