Is sound an issue for heating and air conditioning? Yes. Noisy heating and cooling equipmentadd to sound pollution.While no financial savings are tied to lower sound levels, the sound rating of a cooling system can have a serious effect on comfort and enjoyment of your Toronto home. The sound level of an air conditioner or heat pump depends on many issues, such as how old and who manufactured the unit, and whether the compressor is insulated or not can add to the amount of noise it makes. Although the majority of heating and cooling systems made today are quieter than ever before, it's a good thought to compare sound ratings when evaluating a new air conditioner or heat pump, particularly if the equipment location is near bedrooms or living rooms.