7 Products

Silent Box Fans

Silent Box Fans

The Helios Silent Box (SB) range of Quiet in-line Centrifugal fans, offer a very quiet way to ventilate noise sensitive areas, using ducting up to 400 mm diameter. These Quiet in-line Centrifugal fans combine the high-pressure benefits of a centrifugal fan with the reduced sound levels using sound reducing insulation to provide quiet air movement. Because they are powerful these fans ensure that the system will move air even when the system resistance is much higher than expected. Thus the Silent box range is able to quietly cope with moderate runs of flexible duct as well as spiral ducting. Installation is easy with simple mounting feet included with the fan. Can be mounted in any position including bottom access for false ceilings.
Sort
Showing products 1 to 7 of 7
Helios Silent Box fan - SB 125A & 125C

Powerful & very quiet, high performance up to 122 l/s. These 125 mm diameter fans are available in two model choices SB 125 A at 1130 rpm & SB 125 C at 1850rpm. Spigot connections for circular ducting. Suitable for all commercial applications requiring quiet ventilation including offices, conference rooms, lecture halls, churches, etc.

£312.00
Helios Silent Box fan - SB 160B & 160D

Powerful & very quiet, high performance up to 132 l/s. These 160 mm diameter fans are available in two model choices SB 160 B at 1650 rpm and SB 160 D at 2200rpm. Spigot connections for circular ducting. Suitable for all commercial applications requiring quiet ventilation including offices, conference rooms, lecture halls, churches, etc..

£325.00
Helios Silent Box fan - SB 200C & 200D

Powerful & very quiet, high performance up to 286 l/s. These 200 mm diameter fans are available in two model choices SB 200 C at 2520 rpm & SB 200 D at 2700 rpm. Spigot connections for circular ducting. Suitable for all commercial applications requiring quiet ventilation including offices, conference rooms, lecture halls, churches, etc..

£385.00
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.

£463.00
Helios Silent Box fan - SBD 315A & 315B - SB 315

Powerful & very quiet, high performance up to 672 l/s. These 315 mm diameter fans are available in two model choices three phase SBD 315 A at 1350 rpm, and SBD 315 B at 1290 rpm. Spigot connections for 315 mm diameter circular ducting. Suitable for all commercial applications requiring quiet ventilation including offices, conference rooms, lecture halls, churches, etc.

£913.00
Helios Silent Box fan - SB 355 and SBD 355

Powerful & very quiet, high performance up to 822 l/s single phase and 925 three phase. These 355 mm diameter fans are single phase SB 355 at 1850 rpm ans three phase SBD 355 at 1310 rep. Spigot connections for 355 mm circular ducting. Suitable for all commercial applications requiring quiet ventilation including offices, conference rooms, lecture halls, churches, etc.

£923.00
Helios Silent Box fan - SB 400F

Powerful & very quiet, high performance up to 1092 l/s Single phase and 958 l/s three phase. These 400 mm diameter fans are available in SB 400 Single phase at 1320 rpm and SBD 4oo three phase at 1319 rpm. Spigot connections for 400 mm circular ducting. Suitable for all commercial applications requiring quiet ventilation including offices, conference rooms, lecture halls, churches, etc.

£1,100.00