Just a thought:
With future (current?) upgrades to your home you will be airsealing and insulating it. You need ventilation for sure so we'll asume a ballanced HRV. Now -if- there is an imballance it should be underpressure (to prevent moistproblems in cold weather) so it makes sense to predict the points of infiltration.
If you know where the cold air will be allowed to enter your home you can take measures to prevent drought and discomfort.
/gr
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