VAV Diffusers

Ceiling Slot Swirl VAV Diffuser

The Holyoake CSS–VAV is an externally controlled pressure dependant VAV diffuser, complete with an adjustable blade control damper, positioned by a 24 VAC variable actuator via a 0-10 VDC control signal. Control of the diffuser is via a room thermostat and building management system (supply and installation by others).
Designed to control the temperature in a space by having the ability to change the supply air volume between a minimum and maximum; the CSS–VAV is one of the strongest performing diffusers on the market, with proven induction technology, strong ceiling effect, and capable of handling a wide range of air flows.
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, creating mixing at high levels, reducing draughts and uneven temperature gradients.
  • Lightweight Premi-Aire™ box construction.
  • Infinite range of throw patterns.
  • High induction swirl.
  • 24 VAC modulating actuator.
  • 0-10 VDC positioning control.
  • Pressure dependant control.