Heating Vent Free Blue Flame Garage Heaters are designed specifically for garage applications. These vent-free gas space heaters make supplemental heating fast and easy! Just push a button for easy ignition, stand back and enjoy a great source of dependable, affordable heat. Blue flame gas heaters heat the air first, circulating the warmth through the room, much like your central heating system. This is the updated version of Model MD300TGA. This heater can use optional blower SKU 190002 30,000 BTU Heats Up To 1,000 Sq. Ft. Thermostatic Control �C Variable Heat Settings Patented DUAL FUEL TECHNOLOGY 1 Unit operates off Natural Gas or Liquid Propane Space saving design without sacrificing beauty Economical: 99.9% efficient. No outside duct or chimney needed! Heat for only pennies an hour Built-in ODS (Oxygen Depletion Sensor) included with automatic shut-off No electricity required! Ideal emergency heat Push-Button Piezo ignition Wall mounting bracket included PFS certified Product Dimensions: 23 1/2�� H x 26 5/8�� W x 8�� D