Calculators
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Residential
ERV Sizing Calculators
The whole house ventilation method is recommended.
Whole House Ventilation Method
This method assumes a Whole House Ventilation rate of 0.3 ACH (air changes per hour) to determine the CFM's and required ERV size.
Enter square feet and ceiling height for each floor.
Square Feet:
Ceiling Height (feet):
Main Floor
2nd Story
Basement
Required CFM:
Refresh
Recommended Model:
Room Count Ventilation Method
The total ventilation capacity can be determined by adding together the individual room rates.
Enter the number of rooms for each room type.
Room:
# of Rooms
CFM/Room
Total CFM
Master Bedroom
20
Additional Bedrooms
10
All other occupied rooms
10
Unfinished Basement
20
Finished Basement
30
Bathrooms
10
Required CFM:
Refresh
Recommended Model:
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