Energy recovery ventilator how does it work

Let me better explain. With a standard economizer you draw CFM of outside air, then proportionately remove the same quantity of air using a Barometric Relief , or Power Exhaust. What if you could recover that energy? An ERV is designed to do just that, recover pre-conditioned air before it is removed from the building. An ERV operates on the basis of this air-to-air exchange theory.

A spinning wheel, or stationary core device utilizes the counter-flow of air to remove the stale air from inside a building, while retaining air temperature. Therefore, they are rated to return a percentage of effectiveness Certified By AHRI depending upon your environmental conditions.

These percentages will vary under different environmental conditions, and are usually defined as summer and winter conditions. Illustration 2. Other ERV products exist. For the sake of simplicity this article will only address desiccant wheel and core theory. An economizer will meet code by introducing, and mixing the return air from the building with the outside air, and in most cases contains a barometric relief to remove the pre-conditioned air.

September 17, Image provided by Shutterstock Facebook. Click to Open in Print View. Search for:. Pin It on Pinterest. Increase Font Size. Underline Links. Highlight Links. And be sure to reach out to our dedicated team with any questions you have. UltimateAir, Inc. What is an ERV? In other words, the heat from the exhausted air is transferred to the fresh air entering the building.