The sheet metal company installed the ductwork and roof curb correctly. Then the rooftop HVAC unit was placed on the roof curb. The electrical power and thermostat were properly connected and the gas line was properly connected. The sheet metal company called a separate HVAC contractor who did a “start-up” on the unit. Finally the system was ready for balancing. We arrived on … Continue reading 4. RTU placed on curb 180 backwards