Upon arrival had homeowner turn on living room zone only. Went to zone board to verify that the proper damper was opening. The proper damper was receiving the correct voltage and was open. Tested other zones to ensure that they were not receiving voltage and verified that they were not opening. Physically checked all registers that correspond to the living room zone and all had the proper airflow. Physically checked all registers that correspond to the master bedroom and sun room and all of those registers had no detectable airflow. Put my calibrated thermometer next to master bedroom thermostat to ensure that the thermostat did not deviate from the actual temperature. Closed register near main entrance to try to minimize cross over airflow to master bedroom. Would recommend opening once homeowner begins to run the heat. System is in good working order.