A common problem with chillers is the blocking of the condenser (radiator) with dust being drawn in from the surroundings. It is vital to the healthy and efficient running of the chiller that this remains clear. Where the chiller is to be sited in dusty or dirty environments, or is to be mounted outside, ATC recommend fitting of the air filter into the K1 and K3 chillers. This re-usable or disposable filter is designed to make maintenance easier for the user and thereby extend the life of the chiller. The filter slides into the front panel of the chiller, and can be changed in seconds.