Noise from air conditioners can be a serious issue between neighbours. If an air conditioner is noisy or placed inappropriately it can disturb the quality of life of others, affecting concentration, mood and even causing loss of sleep.It is illegal for Victorian residents to cause unreasonable noise, which can include noise from home air conditioners. There are also times during the night when you are not permitted to operate an air conditioner if your neighbour can hear it in their home.If your local council receives a complaint and your air conditioner is causing unreasonable noise, they can direct it to be relocated or even switched off.To avoid noise issues, it is important to carefully select and locate your air conditioner, as well as maintain it over its life.This guide gives tips on how to get the most from your air conditioner and avoid noise problems for your neighbours. Good purchasing, planning and design can also improve its efficiency, performance and value for money — while making your home a more comfortable place to live.This replaces publication 1176, issued November 2007.