The Neta Twin Series of duct mounted in-line centrifugal fans is complete with a standby fan and motor for applications requiring standby facilities.

Construction
Galvanised sheet steel housing with modern flange connections. Backward-curved centrifugal impellers.

Motors
Type - external rotor, squirrel cage induction motor.
Electricity supply - 220-240V, single or 415V, three-phase, 50Hz.
Bearings - sealed-for-life, ball.
Speed-controllable using electronic or auto-transformer controllers.

Internal Thermal Protection
Manual-reset type fitted as standard on all models with standard motors.

Testing
Air flow test to BS848, Part 1, 1980.
Noise test to BS848, Part 2, 1985.

Special Features
Easy access to the fan and motor is an integral part of the design.
Most three-phase motors are 2-speed star/delta design.
Dual fan, dual-motor arrangements give 100% stand-by facility.
Low-loss non-return damper to prevent short cycling.