Low Noise Performance: Operates at sound levels as low as 50dB (in low mode) eliminating unnecessary noise; Work without distraction and get a good night's sleep with this ac heater combo window unit Window Air Conditioner with Heat: For cooler days, use the supplemental heat option to add warmth to your space; Install the ac and heating unit in the window to maintain a steady temperature in your living room, den, bedroom, or office AC and Heat Window Unit with Auto Restart: After a power failure, the Auto Restart function will automatically turn the heat and air window unit back on when power is restored Multiple Fan Speeds: This ac heater window unit has 2 cooling, heating and fan speeds that allow you to customize your cooling or heating and adjust the air flow to suit your needs Cools Rooms up to 1400 Square Feet: LW2423HR is ideal for cooling medium rooms (22' X 25'); With 1400 square feet cooling coverage, keep your living room, den, bedroom, or office comfortably cool year-round