wiring hrv in a confusing house
Consider a lunos or a couple lunos.

https://foursevenfive.com/lunos-e

Do you humidify in the winter?  If so you might want an ERV core.  

What are you hoping to achieve with the HRV/ERV?  

In a tight house an HRV runs all the time doing .33 ACH to remove VOC, moisture, etc.