Calcolatore Dimensionamento Aspiratore Gratuito
Calcola la portata CFM dell'aspiratore per bagni, cucine e ambienti tecnici.
Fan Rating Needed
85 CFM
Fan Rating Needed vs Room Length
Formula
## Exhaust Fan Sizing **CFM = Room Volume x ACH / 60** The HVI (Home Ventilating Institute) recommends a simpler rule for bathrooms: 1 CFM per square foot for rooms up to 100 sq ft, and 50 CFM minimum. For larger bathrooms, add 50 CFM per fixture (toilet, shower, tub). Kitchens need 100-400 CFM depending on cooking.
Esempio Risolto
10 x 8 ft bathroom, 8 ft ceiling, 8 ACH.
- 01Volume = 10 x 8 x 8 = 640 cu ft
- 02CFM = 640 x 8 / 60 = 85 CFM
- 03Square foot rule = 80 CFM
- 04Use at least an 80-90 CFM fan.
Domande Frequenti
What sone rating is quiet?
Under 1.0 sone is considered very quiet (leaves rustling). 1-2 sones is quiet operation. Above 3 sones is noticeable. Look for fans rated under 1.5 sones for bathrooms.
Does duct length affect fan performance?
Yes. Longer duct runs and more elbows create back-pressure that reduces actual airflow. Check the fan performance curve at your estimated static pressure, typically 0.1 to 0.25 inches of water.
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