Accommodating spaces up to 1000 square feet, the sure heat 30,000-btu blue-flame wall heater helps provide a cozy, warm living space. The unit's electronic piezo ignition system offers quick start-ups with one simple step; no matches, batteries, or other lighting sources required. This unit is perfect for newer homes with tight insulation. The blue flame heater radiates a convection heat which warms the air in the room first, then in turn the objects in the room. This unit runs with 99.9-percent efficiency, costing only pennies an hour. Best of all, it runs on either natural gas or liquid propane and comes with the connection tube included. This allows for easy connectivity to the fuel source available to you with little or no adjustments. The built-in thermostat is another ease of use feature. When the room exceeds the set temperature, the burner and blower will shut off; they will cycle back on when the room temperature drops below the set temperature-no need for constant adjustments. This unvented heater should be used as supplemental heat, in addition to a home's primary heat source; however, if the power goes out or in an emergency situation, it can be safely used as a primary heat source. This unit is omni safety approve and comes with a built-in oxygen-depletion sensor that extinguishes the flame if oxygen levels drop below a.n.s.i. Standards. Floor and wall-mounting brackets, as well as, detailed instructions come included for easy installation in your space.