Heater Air Conditioner: For cooler days use the supplemental heat option to add warmth to your space; The wall heater ac thermostat can be set between 60°F and 86°F (16°C and 30°C); This air conditioning and heater unit requires a special 230/208V LCDI Plug (NEMA 6 - 20) Multiple Fan Speeds: 2 cooling, heating and fan speeds allow you to customize your cooling or heating; Effortlessly adjust the air flow to suit your needs Maximum Usability: Easy to use digital control panel and remote control; 4-way air deflection gives you ultimate flexibility; 24-hour on/off timer, filter light reminder, trim kit, and removable, washable filter included for your convenience Auto Restart: After a power failure, Auto Restart will automatically turn the ac heater unit back on when power is restored Cools Rooms up to 550 Square Feet: LT1237HNR is ideal for cooling medium rooms (25' X 22'); With the 550 square feet cooling coverage, keep your kitchen, living room, bedroom, or office comfortably cool