Don't buy, it's an idiotic design . Cool air as generated is used to cool down the condenser coil(hot coil), a self wastage machine. Must buy dual duct one(one of them is to draw fresh air from outside) though still noisy. Midea got a latest design inverter fed and lower noise on Taobao. Only consider for rented house to take down easily while moving out. Lots of them on second hand market. I am a professional and also a registered electrical worker.