Gamma

Centrifugal Roof Units

  • Robust, lightweight construction.
  • Choice of speeds available.
  • Compact, low profile design.
  • Designed for down flow or vertical discharge applications.
  • Twin vertical discharge fan also available. Provides 100% standby capacity.
  • Shutters are standard on twin fan units and an optional extra for single fan units.
  • Can be mounted at angle up to 30°.
  • Most 3-phase motors are 2-speed star/delta design.
  • Supply air units can be supplied.
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Compatible Accessory Ranges

Please refer to Product Overview in Downloads for accessory size guide

VA – Speed Controller

VA – Speed Controller

VA-VZ – Run-on Timer

VA-VZ – Run-on Timer

SD1-S – Speed Controller

SD1-S – Speed Controller

AVA3.0 – Speed Controller

AVA3.0 – Speed Controller

AVA5.0 & AVA8.0 – Speed Controller

AVA5.0 & AVA8.0 – Speed Controller

CBD – Backdraft Shutters

CBD – Backdraft Shutters

Overview

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 and Benefits

Design

The Gamma Series features a robust, lightweight construction with a and low profile design. This makes them suitable to exhaust air from a wide range of commercial applications. It includes bird mesh to prevent the entry of birds and debris, it also can be mounted at angles up to 30°.

The pressure loss across the shutter has to be added to the system pressure before making selections.

Protection

Thermal protection is supplied as standard on all motors.

Testing

All units are tested to ISO5801:2007 (airside performance) and BS848:Part 2, 1985 (sound performance).

Downflow Exhaust Series

The Gamma Series of centrifugal roof ventilators shall be the downflow exhaust type as designed and manufactured by Elta Fans. Impellers shall be backward-curved centrifugal design and driven by speed-controllable external rotor motors with integral thermal protection. The cowl shall be of the downflow exhaust design and formed from plastic and/or fibreglass. Steel components are corrosion protected. All models shall be fully tested as a complete assembled unit to ISO5801:2007 for airflow and BS848:Part 2, 1985 for noise.

Vertical Exhaust Series

The Gamma Series of centrifugal roof ventilators shall be of the vertical exhaust type as designed and manufactured by Elta Fans. Impellers shall be backward-curved centrifugal design and driven by speed-controllable external rotor motors with integral thermal protection. The windband shall be of the vertical exhaust design and formed from plastic. Steel components shall be corrosion protected. All models shall be fully tested as a complete assembled unit to ISO5801:2007 for airflow and BS848:Part 2, 1985 for noise.

Specification

Construction

Cowls are manufactured from UV-stabilised plastic. Steel components have a corrosion resistant finish. Bird-mesh guards are fitted as standard to both downflow and vertical exhaust models.

Impellers

Impellers are backward-curved centrifugal design and can be plastic, steel or aluminium.

Motor

The fans are built with external rotor squirrel cage induction motor with sealed for life ball bearings. The motor requires an electricity supply of 230V, single and 415V, three-phase, 50Hz. Most three-phase units are fitted with 2-speed star/delta design motors.

Control

Speed-controllable using electronic or auto-transformer controllers (except CE316).

Typical Applications

Airport Terminals
Airport Terminals
Banks
Banks
Bowling Alleys
Bowling Alleys
Call Centres
Call Centres
Canteens and Food Courts
Canteens and Food Courts
Car Showrooms
Car Showrooms
Care and Nursing Homes
Care and Nursing Homes
Cinemas
Cinemas
Colleges and Universities
Colleges and Universities
Commercial Kitchens
Commercial Kitchens
Dark Rooms
Dark Rooms
Dental Surgeries
Dental Surgeries
Departmental Stores
Departmental Stores
Fast Food Outlets
Fast Food Outlets
Fire and Police Stations
Fire and Police Stations
Go Karting Tracks
Go Karting Tracks
Government Buildings
Government Buildings
Gyms
Gyms
Hospitals and Hospices
Hospitals and Hospices
Ice Rinks
Ice Rinks
Indoor Play Centres
Indoor Play Centres
Laboratories
Laboratories
Laundrettes and Dry Cleaners
Laundrettes and Dry Cleaners
Law Courts
Law Courts
Libraries and Archives
Libraries and Archives
Mobile Classrooms
Mobile Classrooms
Mortuaries
Mortuaries
Museums and Galleries
Museums and Galleries
Nail and Beauty Salons
Nail and Beauty Salons
Nurseries
Nurseries
Office Buildings
Office Buildings
Operating and Mobile Theatres
Operating and Mobile Theatres
Petrol Stations
Petrol Stations
Pharmacies
Pharmacies
Places of Worship
Places of Worship
Portable and Temporary Offices
Portable and Temporary Offices
Prisons and Detention Centres
Prisons and Detention Centres
Restaurants and Bars
Restaurants and Bars
Schools
Schools
Shopping Centres
Shopping Centres
Spas
Spas
Sports Centres
Sports Centres
Stadiums and Arenas
Stadiums and Arenas
Student Accommodation
Student Accommodation
Supermarkets
Supermarkets
Swimming Pools
Swimming Pools
Telecoms Buildings
Telecoms Buildings
Theatres
Theatres
Theme Parks
Theme Parks
Town Halls and Community Centres
Town Halls and Community Centres
Train and Bus Stations
Train and Bus Stations
TV and Recording Studios
TV and Recording Studios
Veterinary Clinics
Veterinary Clinics
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