Why it’s Important to Take Measurements Before and After Dryer Vent Cleaning
Typically when somebody experiences a dryer fire it’s because the dryer was not able to vent the hot air produced due to a plugged dryer vent. Checking the airflow of a dryer is done with two methods. The first is back pressure and the second is air flow velocity. These are two very different things but both are important in determining the safety of your dryer system.
Magnehelic Gauge For Testing Back Pressure
Backflow or airflow resistance is measured using a Magnehelic gauge. Appliance manufacturers and industry standards set 0.6 water column reading as a blocked or restricted dryer vent. If the back pressure in your dryer vent is experiencing 0.6 or higher it can put a strain on your appliance and shorten its lifespan while at the same time increasing drying times.
Vane Anemometres Are Used to Measure Airflow Velocity.
A vane anemometer is used to measure CFM or cubic feet per minute that the appliance is pushing to the dryer vent termination point. Measurements should be taken at the back of the dryer as well as at the termination point of the dryer venting. A dryer vent that is considered good airflow should push 1500 ft./m. Any reading less than 1500 ft./m indicates some type of blockage or restriction in the dryer vent run.
Taking Dryer Vent Measurement Readings
It is important to take measurement readings before dryer vent cleaning to see where the system is at as a base, taking measurements after dryer vent cleaning shows the client the improvement in their airflow which means increased safety, energy efficiency, shorter drying times, and less wear on drying equipment.