ASHRAE 62.2 Whole-House Mechanical Ventilation Calculator
Calculate continuous fresh air mechanical ventilation airflow (CFM and L/s) according to ASHRAE Standard 62.2 (2016/2019/2022) and IRC Section M1505 based on floor area, bedroom count, and blower door infiltration credits.
Dwelling & Occupancy Specifications
sq ft
ft
Required Continuous Airflow
4 OCCUPANTS ASSUMED
102.0 CFM
Equivalent to 48.1 Liters / second (173.3 m³/hr)
Floor Area Component
72.0 CFM
0.03 CFM per sq ft dilution
Occupancy Component
30.0 CFM
7.5 CFM per (Bedrooms + 1)
Building Air Exchange Rates
Continuous Fresh Air Exchange Rate:
0.28 ACH
Total Building Volume:
21,600 cu ft