VAV Diffusers


The Holyoake CSS-VAV-E is an externally controlled pressure dependant VAV diffuser, complete with a control damper positioned by a 24 VAC actuator, via an on-board electronic control system, incorporating a supply air duct sensor and a facia mounted room sensor.
Designed to control the temperature in a space by having the ability to change the supply air volume between a minimum and maximum setting.
The CSS-VAV-E is one of the strongest performing diffusers on the market, capable of handling a wide range of airflows. Using the CSS range of square ceiling slot swirl diffusers with slots set in a radial angled pattern, providing a circular swirling airflow, which achieves strong room air induction into the supply air path, resulting in mixing at high level, reducing draughts and uneven temperature gradients.
By combining the flexibility of a fully integrated standalone control system, with excellent air distribution performance, the CSS-VAV-E becomes the latest solution of choice for any VAV diffuser application.
The Holyoake CSS-VAV-E is designed to automatically control a conditioned space without the need for a complex controller or a wall mounted thermostat. Because all of the control components are built into the CSS-VAV-E diffuser, all that is required is a 24 VAC feed (optional transformer available).

  • Electronic control package.
  • Lightweight Premi-Aire™ box construction.
  • Infinite range of throw patterns.
  • High induction swirl.
  • 24 VAC actuator.
  • Pressure dependant control.
Brochure 1