High Capacity and Smoke-Spill

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.