The duration depends on your home's size and the testing method employed. A professional evaluation takes between one and three hours to complete properly. Larger homes with complex ductwork naturally require more time than smaller properties with straightforward systems. The technician needs sufficient time to assess all duct runs and connections to provide accurate results.
Addressing duct leakage can lead to meaningful energy savings, though the exact amount depends on the severity of the leaks and your overall system efficiency. Properly sealed ductwork ensures that conditioned air reaches its intended destinations rather than escaping into unused spaces. The investment in repairs provides returns through reduced utility costs.
Seek technicians with relevant industry certifications from recognized organizations. Professionals with NATE, BPI, or RESNET credentials have demonstrated knowledge of proper testing procedures and system diagnostics. Always verify that the company carries appropriate licensing and insurance coverage. Experienced technicians will explain their testing methodology clearly and provide detailed documentation of their findings and recommendations.