Tips for Choosing and Replacing HRV/ERV Air Filters


What is a MERV Air Filter Rating?

When evaluating the best air filtration for occupants’ specific needs, it’s important to understand the MERV rating system.  Zehnder offers a standard MERV 7/8 filter for its systems with optional MERV 13 and MERV 15 filters available based on occupants’ needs.

Minimum Efficiency Reporting Value (MERV) is a scale designed to rate the effectiveness of air filters.




5 HRV/ERV Filter Replacement Tips

  1. Make sure you locate your HRV/ERV unit in an easy to access place for changing filters
  1. Choose an HRV unit where the filters are easy to replace within the unit
  1. Frequently check the filters to see if the filters need to be replaced, approximately every 6 months.  It can be more or less frequently depending on the amount of outdoor and indoor air pollutants.
  1. Unplug your HRV/ERV unit before changing the filters to prevent dust, bugs, or other small particles from being sucked into the unit
  1. For a more detailed explanation of choosing and replacing Zehnder filters, we recommend this Zehnder filter video.  Replacement Zehnder filters can be purchased online.