LiftMaster Model 3900
The Liftmaster Model 3900 is a 24v DC jackshaft garage door opener. It features a compact design ideal for limited height installations. It may be used on standard and high-lift doors with less than 84” of high lift. It will handle many sectional doors up to 14 feet, and less than 650 pounds. For installations on heavier doors or doors that require a large number of cycles per day you may want to explore stepping up to a commercial jackshaft opener. Liftmaster offers the MJ medium duty that is the logical next step when you are not sure if the 3900 will do.
Feel free to call our offices and one of our commercial garage door specialist will be happy to walk you through the selection process.