ASHRAE 62.2 Ventilation Calculator (Residential)
Why does the calculation use bedrooms instead of actual occupants?
ASHRAE 62.2 uses bedroom count as a standardized proxy for occupancy, assuming the number of occupants equals bedrooms plus one. This avoids guessing future occupancy and is why the occupant term is 7.5 x (Nbr + 1). Leakier homes may also get an infiltration credit under the 62.2-2019 infiltration adjustment, which this tool does not apply.
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Use the ASHRAE 62.2 Ventilation Calculator (Residential) to get an exact answer for your inputs.
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