Completed installation of Aprilaire model 600 bypass humidifier. Mounted unit on the supply plenum and ran the 6†bypass to the return air drop ductwork. Connected a 1/4†copper water supply line between the hot water side of water heater and the Aprilaire. Ran a drain hose from unit to the floor drain. Mounted the humidistat to the return air duct to get an accurate relative humidity reading from whole house. Ran and connected all related low voltage wiring needed to operate the new Aprilaire 600. Run tested the humidifier and everything is working properly. Thank you for choosing Black-Haak. Please take a moment to fill out our online survey.