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Convert air flow rates between cubic feet per minute (CFM) and cubic meters per hour (m3/h) for HVAC and ventilation applications.
m3/h = CFM x 1.69901
CFM = m3/h / 1.69901
| CFM | m3/h |
|---|---|
| 50 | 85.0 |
| 100 | 169.9 |
| 200 | 339.8 |
| 300 | 509.7 |
| 500 | 849.5 |
| 750 | 1274.3 |
| 1000 | 1699.0 |
| 1500 | 2548.5 |
| 2000 | 3398.0 |
| 3000 | 5097.0 |
| 5000 | 8495.0 |
| 10000 | 16990.1 |
CFM (Cubic Feet per Minute) is the standard volumetric flow rate unit used in North America for HVAC, ventilation, and air handling systems. It measures the volume of air moving past a point in one minute. CFM ratings are essential for sizing fans, ductwork, and air conditioning systems to ensure proper ventilation and comfort in buildings.
Cubic meters per hour (m3/h) is the metric equivalent volumetric flow rate unit widely used internationally. It measures air or fluid volume per hour and is the standard in European and Asian HVAC specifications. Converting between CFM and m3/h is essential when working with international equipment or specifications.
Example:
Convert 1000 CFM to m3/h:
1000 x 1.69901 = 1,699 m3/h
100 CFM equals approximately 169.9 m3/h.
North America uses imperial units (CFM), while most other countries use metric units (m3/h). This reflects historical measurement system adoption in different regions.
Bathroom exhaust fans typically range from 50-110 CFM (85-187 m3/h), with 1 CFM per square foot being a common sizing rule.
Calculate room volume, determine required air changes per hour (ACH), and multiply. For offices, 4-6 ACH is typical; for kitchens, 15-30 ACH.
Yes, air density changes with temperature. Standard conditions are typically 70F (21C) and sea level. Actual CFM (ACFM) differs from standard CFM (SCFM) at different conditions.