Alpha and Beta

Axial Roof Unit

    • Wide choice of speeds available.
    • All motors are speed-controllable.
    • Some 3-phase motors are 2-speed star/delta design.
    • Protective bird-mesh guards are fitted as standard on Alpha model unless fitted with optional shutters.
    • Shutters are fitted as standard to the Beta Series.
    • Robust, lightweight construction.
    • Can be used for free intake and ducted applications.

Can be mounted at angles up to 30°.

  • 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

ABD – Butterfly Shutters

ABD – Butterfly Shutters

Overview

The Alpha & Beta Series of axial roof units are designed for a wide range of free intake and ducted exhaust air installations. These robust but lightweight exhaust units are available in 7 sizes in each range extending from 315 to 630mm diameter.

Features and Benefits

Design

This series has been constructed with a robust yet lightweight design to be used in a wide range of free intake or ducted exhaust air applications. The units can be mounted at angles up to 30°.

Shutters

Shutters are fitted as standard to the beta series and are an optional extra on the Alpha series.

Bird Mesh

A bird-mesh guard is fitted on the Alpha model unless fitted with optional shutters.

Weather Resistance

Mushroom cowls limit water ingress in a range of weather conditions.

Protection

Manual-reset thermal protection is supplied as standard on all motors.

Testing

All units are tested to BS848:Part 1, 1980 (airside performance) and BS848:Part 2, 1985 (sound performance).

Specification

Construction

Cowls are made of UV-stabilised plastic or fibreglass. Metal components have a corrosion-resistant finish. Shutters are fitted as standard to the beta series and are an optional extra on the Alpha series. A bird-mesh guard is fitted on the Alpha model unless fitted with optional shutters.

Impellers

Impeller blades are GRP as standard with an option of aluminium where required. The impellers run in pressed steel plates ensuring a certifiable performance.

Motor

The fans are built with a squirrel cage induction motor with sealed for life ball bearings. The motor requires an electricity supply of 230V, single or 415V, three phase, 50Hz.

Control

Speed-controllable using electronic or auto-transformer controllers.

Additional Information

Contact you local Elta Fans office for fan selections at speeds other than shown. When shutters are fitted ensure the roof unit is mounted with the shutter hinge pointing down the slope of the roof. When shutters are fitted to the Alpha series performance is decreased by approximately 15-20%.

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
Factories
Factories
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
Workshops
Workshops
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