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A quality assurance process during and following building construction, prior to occupancy. Tests and inspections should note any problems to be fixed immediately (“fix and tune”). Tests should be conducted for duct leakage, building enclosure leakage, air pressure relationships under all operating conditions, proper venting of all combustion appliances under all operating conditions, carbon monoxide output of all combustion appliances, and confirmation of airflow and refrigerant charge in the HVAC systems. Additionally, the building occupants should be educated about the correct operation and maintenance of the building and equipment.