Japanese company Kusatsu specialises in a bathroom air controller that utilises the newest Japanese PTC heating methods combined with an overheating safety function and a low-noise, double motor design. The KBF231SHAH bathroom air controller is the fourth generation model since launching in 1986, and can be installed in the ceiling, window or mounted on a wall. The bathroom air controller comprises several modes: warm for releasing warm air during a shower; dry for drying the bathroom and clothes; cool for keeping the bathroom fresh; and air-ex or 24-hour air-ex for circulating air in the bathroom. It is easy to clean and is fitted with a filter cleaning detection light. Kusatsu’s sole agent, Frankfurt Industrial Limited, is a registered Hong Kong company founded in 1992.