GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Top quality HRV/ERV

joenorm | Posted in General Questions on

I am wondering if there is a consensus on the best HRV/ERV money can buy?


GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. charlie_sullivan | | #1

    Zehnder is generally considered to occupy that position in the market. The only negative (other than cost) is that they use an electric preheater in extreme cold to combat having the core freeze up. Their even more expensive groud-loop preconditioning system is a way to avoid that if we are really ignoring cost. Others use different defrost systems.

    1. this_page_left_blank | | #3

      The other defrost systems all rely on reducing ventilation, which is the primary function of the unit. Ventilation requirements don't change when it gets cold outside, so it's pretty hard to justify that approach, in my opinion. It would be defensible if they recommended oversizing the unit to account for that, plus provide a control mechanism to automatically increase the overall air flow to compensate for the recirculation. They don't do either. One maker, I think it's Renewaire if I recall correctly, claims not to need any frost prevention mechanism at all. I'm pretty skeptical that is the case in every possible scenario. One thing to note is that an ERV is much less prone to frost buildup than an HRV, which is a good argument to always go with that option.

  2. joenorm | | #2

    Do you know if a license is required to install them professionally?

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |