High Capacity and Smoke-Spill

Vertical Exhaust Axial Roof Ventilators

Excl. VAT

Robust and durable galvanised steel construction.
Adjustable pitch impellers can provide a wide range of performances.
Available in a range of speeds to suit specific applications.
Can be used for free air intake and ducted applications.
Impellers can be GRP, aluminium, nylon or anti-static (max 1400mm dia) to suit specific applications.
Designed to handle clean air, toxic, noxious and explosive gases as well as handling air at elevated temperatures such as for smoke-spill applications.
All non-hazardous motors are speed-controllable using variable speed drives.
Multi-speed motors, as well as motors to meet Ex d, Ex e, Ex nA and Ex tD Standards can be supplied.

SKU: EFAP-25

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Overview

The High Capacity (HC) and Smoke-Spill (SS) Series of vertical exhaust axial roof ventilators have been designed for use in commercial and industrial applications. They are built to handle clean air, toxic, noxious and explosive gases as well as handling air at elevated temperatures. There are 10 sizes in the series extending from 500 to 1800mm diameter.

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Product Overview

Features and Benefits

Design

The High Capacity (HC) and Smoke-Spill (SS) Series are a range of robust and durable roof ventilators. They can be used for free air intake and ducted applications. Units are designed to handle clean air, toxic, noxious and explosive gases as well as handling air at elevated temperatures such as for smoke-spill applications.

High Capacity Series

The HC Series axial roof ventilators are designed and manufactured by Elta Fans. The axial impellers are adjustable pitch, driven by a direct drive motor and supplied with blades of GRP, aluminium, nylon or anti-static material; GRP is standard. It has a vertical discharge type cowl, incorporating butterfly shutters and manufactured from galvanised steel. All models are fully tested to BS848:Part 1, 1980 for airflow and to BS848:Part 2, 1985 for noise.

Smoke-Spill Series

The SS Series axial roof ventilators are designed and manufactured by Elta Fans. The axial impellers are adjustable pitch, manufactured in aluminium and driven by a direct drive motor. It has a vertical discharge type cowl, incorporates butterfly shutters and manufactured from galvanised steel. Motors used suit the elevated temperature needs of smoke-spill applications. All models shall incorporate fans fully tested to BS848:Part 1, 1980 for airflow and to BS848:Part 2, 1985 for noise.

Protection

Thermistors can be fitted on request. If fitted on Smoke Spill Series they must not operate under smoke-spill mode.

Testing

500-1000mm diameter units have been tested to BS848:Part 1, 1980 (airside performance) and 1250-1800mm diameter units have been tested to ISO5801:1997 (airside performance). All units are tested to BS848:Part 2, 1985 (sound performance).

Smoke-spill Applications

The SS Series of smoke-spill fans has been fully tested to meet the air performance and high temperature requirements of Standards AS/NZS1668.1:1998 and AS4429:1999.

Discharge Damper

Fail-open Latching – An additional requirement of AS/NZS1668.1:1998 with respect to un-sprinklered buildings (300°C for 30 mins) requires dampers to fail-open during smoke spill operation. The fail-open discharge damper latches come in two forms; the first being a manual release type requiring manual closing after the fan has been run. The second design, an electro-mechanical type permits the shutter latch to release and close automatically after the fan stops. For advice on smoke-spill wiring requirements refer to AS/ NZS1668.1:1998.

Specification

Construction

Cowls have been manufactured from galvanised steel. Backdraft shutters are fitted as standard on all units.

Impeller

The high performance blades can manufactured from GRP (standard), aluminium, nylon or anti-static to suit the application.

Motor

The fans are built with standard squirrel cage induction motors with sealed for life ball bearings. The motor requires an electricity supply of 415V, 3-phase, 50Hz.

Control

All standard motors in HC range can be speed-controlled using variable speed drives. Motors with 2-speed windings, or to meet Ex d, Ex e, Ex nA, Ex tD or smoke-spill applications can be supplied.

Additional Information

Accurate selections, including comprehensive Noise Data, can be obtained from your local Elta Fans office or from our Product Selection Program. Refer to Elta Fans for performances at speeds other than shown. Where prevailing winds are high we recommend the fitting of Magloks®. Designed for mounting on horizontal up-stands only.