Did you know that on average homes leak 20-30% of the air from their HVAC into unconditioned spaces? We will test your ductwork and provide an estimate for repairs to lower the leakage. New residential codes require a maximum 12% leakage. We often achieve less than 3%. Duct tightness verification testing uses a diagnostic tool engineered to measure air-tightness of the HVAC system ductwork. The tool has devices that measure both air flow rate and pressure created by the fan flow. This combination of measurements are used to determine the air-tightness of the ductwork, which gives us additional information to achieve better energy conservation.