Keep in mind that the balanced flow adds to the natural infiltration/exfiltration and exhaust air from clothes drier and the kitchen hood. Over ventilation during cold, weather is more common. During calm winds and mild temperature is when you need the max capacity of the HRV. Monitoring the CO2 levels verses the number of occupants, when occupied will give the true air change rate. Also the amount of moisture in the air in the home verses the number of occupants and moisture in the outside air.
2,330 sq.ft. X 9 ft. ceilings= 20,970 FT^3
20,970 / 85 cfm = 246 minutes (4 hours) plus natural infiltration and mechanical exhaust.
This home will be too damp during high outdoor dew points and too dry during cold weather low outdoor dew points except during high occupancy.
If you want more, enlarge the ducts on the HRV.
Your thoughts?
Regards Teddy Bear
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"