I have been disturbed to find that many HRV/ERVs are installed without any concern about balancing the system.  (Click on HRV Survey for a CMHC study of system installations.)  When I first got started with these things, it was a mandatory step in the process.  They also had to be ducted independently from the HVAC system ductwork.  That is seemingly a rare installation these days.  … Continue reading Unbalanced HRV/ERVs