Table of the fan rating groups
According to ISO 14694 (2003), Chapter 8.4
Application
Max. drive capacity [kW]
Fan rating group
Building ventilation
≤ 3.7
BV-2
> 3.7
BV-3
Hazardous gases
≤ 37
BV-3
> 37
BV-4
Impeller gap table for centrifugal fans
Size
Impeller gap (+ tolerance) in mm
Immersion depth (+ tolerance) in mm
315
1.5 (+3.0)
2.0 (+5.0)
355
1.5 (+3.0)
2.0 (+5.0)
400
2.0 (+3.0)
2.0 (+6.0)
450
2.0 (+3.0)
2.0 (+6.0)
500
3.0 (+3.0)
3.0 (+7.0)
560
3.0 (+3.0)
3.0 (+7.0)
630
4.0 (+3.0)
4.0 (+8.0)
710
4.0 (+3.0)
4.0 (+8.0)
800
4.0 (+3.0)
4.0 (+8.0)
900
4.0 (+3.0)
4.0 (+8.0)
1000
5.0 (+3.0)
5.0 (+8.0)
1120
5.0 (+4.0)
5.0 (+8.0)
1250
6.0 (+4.0)
5.0 (+10.0)
1400
6.0 (+6.0)
8.0 (+10.0)
1600
7.0 (+6.0)
8.0 (+10.0)
Tables
Centrifugal fans REH; RZH; BVREH; BVRA
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