HRV and ERV inspection

According to InterNACHI SOP, is HRV and ERV inspection required or not? Some of the inspectors I know said “No”.

Here is a link to our SOP:

Do you have any specific questions about HRV and ERV systems? I recently did a presentation on these systems for a local ASHI chapter, and can offer good insight on what to look for when you find an ERV/HRV. Especially, if you have a brand name and model number.


I will typically determine if the HRV is functional or not and open it up and check the filters as most people do not clean them.