Aprilaire 6708 specifications:
The Aprilaire 6706 - 6" Round Damper - Slip-In is a spring-return damper designed to be inserted in an eight inch round branch duct. This HVAC damper helps zone your home without costly duct modification. The Aprilaire damper provides true comfort throughout your home and boasts maintenance-free operation. This motorized damper is also known by model number 6708.