What Are Swirl Diffusers?

Arguably the most effective type of ceiling mounted diffuser available, swirl diffusers are renowned for their high performance and their true 360 degree throw. 

An alternative to louvre-faced ceiling diffusers, swirl diffusers are generally available in either fixed or adjustable variants. Fixed swirls, as their name suggests, have a circular pattern of fixed blades designed to throw air radially across the underside of a ceiling. Using the Coanda effect, this newly supplied air will spread widely until slowing and falling into the occupied space, thus a wide area can be ventilated from a single point. 

Adjustable swirl diffusers differ in that directly behind the fascia plate are individually adjustable blades. These can be set to throw air in any direction. As such, they can throw air radially like a fixed swirl, but they can also throw it in a single direction across the ceiling or even straight down. This makes adjustable swirls well suited to installations where ventilation patterns may need to be changed, without the need to physically move diffusers. 

Swirl Diffusers From HVC 

Both fixed and adjustable swirl diffusers are also available in circular or square formats. Circular swirls tend to be mounted directly to the ends of ductwork in large open plan spaces like airport terminals, square swirls in contrast generally suit lay in ceiling tile systems commonly fitted into commercial spaces, such as offices. 

HVC holds one of the largest stocks in the UK of square swirl diffusers, in both fixed and adjustable variants, giving us the ability to supply even the largest orders on a next day basis from our centrally located warehousing facilities in the West Midlands. As well as swirl diffusers, we also carry a full range of HVAC products, such as linear slot diffusers and fire dampers. Furthermore, we can also supply a range of ancillary products, like specially adapted plenum boxes, to suit swirl diffusers and single blade dampers for local volume control.