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.
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.
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..
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..
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.