What’s the Best Way to Locate Airflow Restrictions?

HVAC airflow restrictions

How do you check for airflow restrictions?

Airflow restrictions are a common problem in the HVAC world. Depending on the cause, they’re either easy to locate or more difficult detect. From dirty furnace filters to duct leakage, there are plenty of reasons why your building may be experiencing airflow restrictions. Here are a few ways that you can hunt them down.

Instruments and Accessories

Sure you can press your ear against the building and listen for the problems to present themselves, but perhaps we could take a step into the 21st century together. If you want to track down airflow restrictions efficiently, first purchase the necessary instruments and accessories. You’ll need a digital camera, a digital manometer, one length of tubing, and a carrying case.

Begin at the Air Handling Equipment

First, measure RESP and then add air filter pressure drop and indoor coil pressure drop to this reading which provides an overall picture of what’s wrong with the system. You’ll need to install ⅜-inch test ports where air enters and leaves the equipment. Once the test ports are installed, measure pressure entering and leaving the equipment and add these pressure together to determine TESP. If measured TESP exceeds the air-handling equipment’s maximum rated TESP, you most likely have an airflow issue.

Measure Indoor Coil Pressure Drop

The indoor coil may be too restrictive for the proper amount of airflow, which means that testing the pressure drop will allow for you to locate restrictions. A properly sized, clean coil should typically have a pressure drop no higher than 0.20 to 0.30 inch of water column. If the pressure drop exceeds this, you could have a problem.

For HVACR Services, Call Brothers Mechanical Services

Brothers Mechanical Services is a trusted Virginia company servicing commercial and government agencies. BMS offers one of the most comprehensive lines of mechanical services in the industry, and has been proudly serving the local area for over 15 years. When you want professional service, quality selection, and competitive prices, the professional technicians at Brothers Mechanical Services are standing by to serve your needs.

If your needs include new installation, our team of experts will comprehensively analyze your requirements and provide a detailed report on recommended solutions that fit your needs, and your budget.

We offer 24-hour emergency service. If you have a problem, give us a call at (703) 649.2977 and a trained professional will be there to assist you. For more information regarding our services and projects follow us on Facebook, Twitter, Google+, and Linkedin! Contact us today!

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