The Centrifugal Humidification System HR-15 is ideal for indoor growing. Not only will it help you to ensure an optimum level of relative humidity (50-75%) in your grow room, it’s also compact enough to fit into small growing areas, easy to install (connects to water tap or water tank), easy to carry by handle andccan be connected to another reservoir for automatic top-up. •Suitable for propagation, this easy to install kit includes: Centrifugal Humidification System HR-15 x 1, Humidistat HR-HRSA X 1, Hose Pipe 13mm per metre x3, Hozelock Hose End Connector x1 and Reservior with 13mm tap 100 litre. You can also upgrade to the Faran Digital Humidistat. Please ask for details.