Richard adds motorized zone dampers to a forced-air heating & cooling system.


Steps for How to Zone a Forced-Air Furnace and Air Conditioner:

• Cut into each flexible branch duct and install a motorized zone damper. Secure the damper to the duct with nylon cable ties.
• Make the wire connections at each motorized damper and run all the wires back to the control panel at the furnace.
• Remove the control panel's cover and plug in the telephone-jack connections for each zone.
• To maintain the proper pressure within the system, install a weighted bypass damper between the supply trunk and return trunk.
• Seal all the duct joints with mastic or foil-faced duct tape.
• Adjust the weights on the bypass damper to ensure proper airflow to all registers.
• Find a suitable spot in the house to install a wireless thermostat to control the new zones. To ensure accurate readings, place the thermostat away from direct sunlight and heating registers.