The Gamma Series of centrifugal roof units has been designed for use in commercial ducted exhaust applications. These compact and low profile units are fitted with bird-mesh to prevent the entry of birds and vermin into the ducting or building. They are available in 12 sizes, extending from 192 to 710mm diameter.
Features
- Robust, lightweight construction.
- Choice of speeds available.
- Compact, low profile design.
- Designed for down flow or vertical discharge applications.
- Shutters are an optional extra. The pressure loss across the shutter has to be added to the system pressure before making selections.
- Can be mounted at angle up to 30°.
- Most 3-phase motors are 2-speed star/delta design.
- Supply air units can be supplied,
- Twin vertical discharge fan also available
Construction
Cowls are UV-stabilised plastic.
Impellers are backward-curved centrifugal design and can be plastic, steel or aluminium.
Steel components have a corrosion resistant finish.
Bird-mesh guards are fitted as standard to both downflow and vertical exhaust models.
Testing
Air flow tests to ISO5801:2007
Noise tests to BS848:Part 2, 1985
