Quest - 155 Overhead DehumidifierOverview The Quest 155 Overhead Dehumidifier is a premium product, which prevents plant rot and structural damage in grow rooms and commercial areas. The low amp product can remove up to 74 litres of water per day. The unit includes a plug & play feature and it's easy to set up and install. The unit includes a humidistat made for consistent humidity control and monitoring. You can connect six units and use different types of ducting. General