Commercial - Greenwood
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Our Commercial range

  • CDGL

    Commerical Window Fan available in 6",9" and 12" models. Suitable for glazing thickness up to 32mm and wall panels of 360mm. Switches and remote sensor options available
  • CDWA

    Commercial wall fan available in 6", 9" and 12" models and suitable for wall installations up to 380mm. Reversible supply or extract with variable speed operation and a range of swtiching and sensor options
  • CDRE

    Refurbishment commericla wall fan available in 6", 9" and 12" models and design to replace many products easily without further drilling or plugging. Range of switches and sensor options available
  • CDCK

    Commercial ceiling fan available in 6", 9" and 12" models designed with thermoactuated backdraught shutters and a picture frame adaptor for retro-fit applications. A range of switches and sensor options is available.
  • CDPR

    Commerical pitched roof fan available in 6", 9" and 12" models with picture frame adaptor for retro-fit installations. Thermoactuated backdraught shutters offer position closure when the fan is off. Supplied as a complete kit for ceiling mounting. A range of swtiches and sensor options is available.
  • CDFR

    Flat roof commercial fan available in 6", 9" and 12" models offering reversible supply or extract and variable speed operation. Supplied as a complete kit for roof installation - a wide choice of switches and remote sensor options are also available.
  • Sensors/Switches

    The range of sensors and switches for the Eco Comemrical range of 6", 9" and 12" fans offer integral or remote control options including humidity, air quality, passive infra red, temperature, timer and many options for ventilation in commerical buildings
  • Eco Fan Accessories

    The Eco commerical ventilation range of fans are suitable for a wide variety of commerical properties including pubs, clubs and kitchens - a wide range of commerical range accessories are available including grilles, ceiling adpators, roof terminals for 6", 9" and 12" commerical extractor fans

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Building Regulations & Performance Requirements.

The Building Regulations require ventilation in all new-build or refurbishment commercial premises, where planning permission is required.  They work by identifying the technical requirement for;

  1. Rapid ventilation, such as opening windows.
  2. Background ventilation e.g window vent, airbricks
  3. Mechanical Extract Ventilation either user or automatic operation

For maximum efficiency, careful planning for the installation, size and number of fans is required. This can be calculated by
the following advice:

Performance Requirements

  1. Calculate the volume of room (length x width x height) in cubic metres.
  2. Identify the room usage in the list below for the recommended number of air changes per hour.
  3. Multiple the room volume by the number of air changes to obtain the required air extract rate (m3/h-1).
  4. Select the fan model that has a performance at least equal to this extract rate from our commercial range.
  5. If no single fan meets the required extract rate, divide the rate by the performance of selected fans to establish the quantity of fans required.

Building Regulation guidance:

Additional Guidance;

Commercial Regulation Guidance

Zehnder Group