Hi,
I am looking to install an ERV (Renewaire EV90P) to my home and am struggling to find people both interested but also qualified (or interested) to tell me the best install configuration and why instead of just dumping the fresh air into the return plenum. I’m considering now doing it myself and having two return vents (kitchen and bedroom) and two fresh air grilles (living room and hallway). Already have 200 CFM range hood ducted to outside and a bathroom exhaust fan with 60 min. timer to let run extra time up to this point. Blower door test showed 1.9 ACH. Have issues getting rid of moisture (RH never below 45%) in the winter and I use a CPAP which can introduce 1.5 cups of water per night into the air. The house needs fresh air. Have a map of the home with specifics (only 1150 sq ft ranch) if interested. My calculation says I need about 45 CFM if I was using a whole house ventilator per ASHRAE. Looking for feedback, suggestions, concerns, recommendations on anything related to this including dampers for the intake and exhaust and best ways to keep bugs or vermin out yet the air flow freely. This is in Wisconsin so am trying to get it done before the fall/winter temps crash. Thanks in advance for thoughts, suggestions, questions etc. John E.