免费通风量计算器
计算房间或建筑所需的通风换气量。
sq ft
people
CFM
CFM
Total Outdoor Air
110 CFM
People Component50 CFM
Area Component60 CFM
Total Outdoor Air vs Floor Area
公式
## ASHRAE 62.1 Ventilation **Outdoor Air = (People x CFM/person) + (Area x CFM/sqft)** ASHRAE 62.1 uses a two-part calculation: a per-person rate for bioeffluents and a per-area rate for building emissions. Office spaces typically use 5 CFM/person and 0.06 CFM/sqft.
计算示例
1,000 sq ft office with 10 occupants.
- 01People = 10 x 5 = 50 CFM
- 02Area = 1000 x 0.06 = 60 CFM
- 03Total = 50 + 60 = 110 CFM outdoor air
常见问题
Why are there two components?
The per-person rate handles CO2 and odors from occupants. The per-area rate addresses off-gassing from building materials, furniture, and finishes regardless of occupancy.
Is this the total supply air?
No, this is only the outdoor (fresh) air portion. Total supply air also includes recirculated air needed for temperature control, which is typically much higher.
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