Designed for easy storage, use, and operation without the need for permanent installation, portable AC units are an ideal option for both households and small business environments. Fitted indoors and requiring only a window to function in full effectiveness, these small air conditioning units have a typical minimum duty of 3.5kW. Some are capable of both heating and cooling rooms.

Some units are fully capable of serving as internal dehumidifiers, with examples from Haier removing over a litre of water per hour from the rooms they are installed in.