A Decibel (dB) is the unit used to measure the intensity of sound. In the HVAC industry, lower decibel ratings indicate a quieter system. Our Wall Mount R410A indoor units are engineered to operate at decibel levels as low as 22dB—quieter than a whisper in a library. This is achieved through advanced "Variable Speed" fan motors and aerodynamically designed Swing Louvers. Outdoor units, like our Multi-Zone R454B Condenser, are also designed to minimize noise pollution for you and your neighbors. Understanding dB ratings helps you choose the best unit for a quiet bedroom or office environment. We provide dB specs for every Single-Zone unit to ensure you know exactly what to expect. Quiet operation is a hallmark of the premium Alpic Eco experience. It ensures that your comfort is felt, but not heard.