For the budget conscious these room or window air conditioning units are usually the most economically priced to buy. Traditional room or window air conditioning units can sometimes be plugged straight into an approved power point. No other refrigeration connections are required making for very simple installation. These room or window air conditioning units can be either fitted to windows, or for reduced noise levels, installed in a specially cut wall opening. They are also popular for caravans and tents as a temporary cooling solution. They are self-contained within a weather-sealed casing, and come in a range of cooling and reverse cycle models to suit your particular needs. These complete room and window air conditioning units run at a higher noise level than other units as the compressor can not be located elsewhere. They are often used as a cheap alternative and can be installed by any handyman. The smaller units have a plug and can be plugged into an existing power point.