Comments about Jackson Systems 10" Round Zone One Damper Assembly D-Z1-10:
Very good damper. I used it to even out a bedroom zone, one bedroom was closer to the unit by 20' causing it to alway be much cooler in the summer and very hot in the winter. This damper has its own thermostat and transformer so it works independent from the air handler. The thermostat does not control the air handler only the damper. I received an estimate for a true zone system and it was $700.00 to $800.00. This do it your self damper was just over $300.00 with all the parts and it work great.
Thank you