Indoor Heater: Direct vent wall furnace has stainless steel bunsen burners, a warm air outlet with forced combustion and convection through bottom front louvers, and an enameled tray humidifier Smart Features: Energy efficient furnace includes an electronic spark ignition, a seven-stage modulating gas valve, timer settings, a variable speed inducer motor with pressure switch, and an electronic thermostat with a range of 60°F to 80°F Safe Settings: Electric heater features a child lock and self-diagnostic electronics that continually monitor functions, provide auto shutdown codes, and restart automatically when ignition or combustion fails Gas furnace: For homes, apartments, condominiums, and commercial settings; the heater is modular/mobile home approved