Frigidaire's 12000 BTU portable air conditioner with 4100 BTU supplemental heat function gives you everything you love about a portable air conditioner and more! Whether it?s cold in April or hot in October this unit will keep you comfortable in a room up to 550 square feet. In addition to cooling this versatile unit offers supplemental heating providing you with an additional heat source to your main heat source when outdoor temperatures are above 45 degrees Fahrenheit. Wheels allow you to easily move the air conditioner from room to room and the included window venting kit makes setup quick and easy. With our auto-swing louvers you will receive more even air distribution as the louvers automatically circulate cool air throughout the room. Effortless temperature control maintains the preset temperature so you will remain comfortable. Plus effortless restart automatically resumes operating at its previous settings when power is restored to your unit after a power outage.