How unbalanced can an HRV / ERV be commissioned? – GreenBuildingAdvisor

Just curious if there are any first hand accounts of how unbalanced an HRV/ ERV can be made to run to create positive pressure? 

My owner built home is coming along in CZ7 (NW Ontario). Had a blower door test done yesterday and obtained incredible results of 0.2ACH50 which equals only 85 CFM of leakage in my 35,000 cu ft home.

We had a Fantech ATMO 300cfm ERV roughed in with dedicated ducting, along with a 2.5 ton Mitsubishi Zuba ducted heat pump. My hvac installer mentioned they typically try to commission the ERV to be slightly positive.

Just curious if there are any first hand accounts of how much positive pressure an ERV can generate. We have no other exhaust only appliances except a range hood which will only run on low and we will need to crack a window if the woodstove is running.