Helios Super Quiet Silent Box centrifugal fan - SB 250

Helios Silent Box fan - SB 250C & 250E

Powerful & very quiet, high performance up to 314 l/s. These 250 mm diameter fans are available in two model choices SB 250 C at 2120 rpm & SB 250 E at 2420rpm. Spigot connections for circular ducting. Suitable for all commercial applications requiring quiet ventilation including offices, conference rooms, lecture halls, churches, etc.
SB 250C model: SB 250E model:
Max Air Volume : 267 l/s
Noise : 43 dB(A)
Watts : 255 W
R.P.M : 2120
Speed controller TSW 1.5
Max Air Volume : 300 l/s
Noise : 44 dB(A)
Watts : 165 W
R.P.M : 2690
Speed controller TSW 1.5

Helios SilentBox Fan Overview:
Very quiet fans in an acoustic casing ideal for ventilating noise sensitive areas achieving good volumes at high pressures. A fully speed controllable centrifugal fan range suitable for indoor use terminal box rated IP55 (weatherproof) with a pre-galvanised steel casing.with circular spigots for connecting to ducting using pipe clamps.

250 mm fans are suitable for most small systems changing the air and removing airborne pollutants from all noise sensitive applications including offices, conference rooms and retail units with internal occupied spaces requiring ventilating with a ducted system.

Main Features:
- Super quiet and powerful centrifugal fan for use with 250 mm dia ducting.
- 2 speed options available.
- Easy access to motor and impeller.
- High performance up to 314 l/s and 261 l/s.
- 1 Year no quibble warranty.
- Quality assured by the manufacturer ISO9001.
Helios SB 250 C Dimensions: Helios SB 250 E Dimensions:
Duct Diameter: 250 mm
Length: 400 mm
Width   470 mm
Height  342 mm
Weight : 18.0 KG
Duct Diameter: 250 mm
Length: 658 mm
Width   608 mm
Height  410 mm
Weight : 27.0 KG

Installation Instructions - click here
Wiring Diagram - click here
Catalogue Pages - click here

Helios Code:
SB 250C, SB 250E
  • Product Code:
    SB 250C
product review overlay image

Customer reviews

No reviews left yet
Write a review

No reviews have been left for this product, be the first to leave a review