With no chimney systems required, this product can go almost anywhere in your home (except in bathroom, bedroom, spa room, mobile home, or recreational vehicle), with adequate provisions for combustion and ventilation (room size and BTU's of appliance are the deciding factors of what BTU size can be used for a particular installation). The appliance is 99.9% efficient - using room air for combustion and exhausting to the room. The vent-free burner systems have an ODS pilot system, which shuts the burner system down if oxygen in the room falls below acceptable limits.Certifications: ANSI certified Collection: Zero Clearance Control: Millivot Depth: 14 Fuel Type: Natural Gas, Liquid Propane Heat Output: 30,000 BTUs Height: 30-1 2 Width: 32-1 2{Features: Hi low Millivolt or manual valve with variable adjustment of flame and BTU An ODS sensor that constantly monitors the room air and provides 100% gas shut off if oxygen is reduces below acceptable levels Black Canopy Hood All controls in Lower Access Panel (System Burner Only) Matchless Piezo Ignition Fixed Protective Door Screen or Pull Screen Decorative Ash Bed Wall Switch Control (for Millivolt Systems Only) {Option Features: ~Fan Kit - ~Heat activated blower with variable speed control ~Decorative Black Panels or Grills - ~Grills available in Black, Antique Brass, Polish Brass, Chrome and Classic Series Black with Antique, Chrome, or Polish Brass accents ~Surrounds Wide - ~Polish Brass, Antique or Chrome ~Polish Brass, Antique or Chrome - ~Gun Metal Black, Antique, Chrome, Polish Brass ~Thermostat - ~ Wall Mount Millivolt Thermostat or Programmable Thermostat ~Remote Control - ~On Off, Thermostat or Hi Lo On Off