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- Attach Testing Equipment – Next, the technician will attach some equipment that will test the status pressure of your dryer vent.
- Conduct Dryer Exhaust Duct Performance (DEDP) Test – First the technician will disconnect your dryer from the wall, hook up the pressure gauge, connect the dryer exhaust to the testing equipment, turn ‘on’ the dryer, and then record the pressure differential reading. The technician will take pressure readings at a minimum of three different locations on the dryer vent. Finally, the technician will compare the actual pressure reading to the performance tables. If the pressure readings or velocity results fall below the minimum threshold, the technician will identity the conditions that may be causing lower than average dryer vent performance.
- Document Test Results and Make Recommendations – The technician will determine whether your current dryer vent system has ‘passed’ or ‘failed’ the Dryer Exhaust Duct Performance Test. Relevant factors to the test include estimated length of the dryer exhaust duct, actual backpressure readings, and maximum airflow velocity readings. The technician will also note whether any adhered substances are present, and will make any final recommendations to improve system performance and safety. If you dryer vent system fails the test, the technician will make the relevant adjustments to your system and retest.