The heat pumps we install run at a maximum decibel rating of 55dB. This is about as noisy as a gas boiler flue should you stand near to it when a boiler runs. We ensure that noise levels are kept low by installing the heat pump on the ground where possible to avoid noise transference into brickwork. All heat pump installations must pass the MCS standard MCS020. This is calculated during our free Heat Loss survey of your home.