ASHRAE 62.2 whole-house ventilation rates
ASHRAE Standard 62.2 sets whole-house mechanical ventilation at 0.03 × floor area + 7.5 × (bedrooms + 1) CFM. The table shows the rate for common home sizes; compute yours with the ventilation-CFM tool.
| Floor area | Bedrooms | Required CFM |
|---|---|---|
| 1,000 sq ft | 2 | 53 CFM |
| 1,500 sq ft | 3 | 75 CFM |
| 2,000 sq ft | 3 | 90 CFM |
| 2,500 sq ft | 4 | 113 CFM |
| 3,000 sq ft | 4 | 128 CFM |
ASHRAE 62.2: CFM = 0.03 × floor area + 7.5 × (bedrooms + 1). Continuous whole-house mechanical ventilation.