During the winter, the stack effect and wind forces a home to breathe much more than during the summer.
There is more need for fresh air ventilation during the summer than during the winter when the windows are closed for a/c.
Well ventilated homes with only a couple of occupants may need some humidification during winter in cold climates. All well ventilated homes in green grass climates need dehumidification during low/no cooling load conditions with +55^F outdoor dew points.
HRVs transfer heat from warm to cold air streams. Expect condensate only during extreme cold weather with a well humidified home. No condensate during the warm seasons. Fresh air ventilation whenever the windows are closed.
Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
Use +Merv 10 air filter. -Don't forget the "Golden Rule"