HVAC Info – Performance & Safety

Professionally Tested for Airflow

We worked with a licensed HVAC technician to test our covers on a standard residential system. Here’s what the results showed:

• Static pressure before the cover: 0.5 in WC

• Static pressure after applying the cover: 0.4 in WC

• Airflow into the system remained smooth and unrestricted

• No change to air being pushed out into the home (outflow)

What is “in WC”?
“Inches of water column” (written as in WC) is how HVAC systems measure airflow pressure — kind of like blood pressure for your air ducts. Lower numbers usually mean air is moving more freely, which is a good thing.

The technician confirmed that the cover did not block airflow. In fact, the slight drop in pressure showed that air entered the system more smoothly. They also explained this may help with dehumidification, as slower-moving air has more time to pass over the system’s coils and release moisture.

Every System is Different

While our test showed great results, all HVAC systems are different. Factors like:

• System age

• Duct layout

• Return vent size

• Filter placement
  ...can all affect how your system responds.

If you've had airflow concerns before, or want peace of mind, we recommend having an HVAC technician do a quick check before or after installing your cover.