Prihoda UK Ltd supplied bespoke fabric ducting (textile diffusers) for the canteen and sports hall at Whitmore High School in north London, a new facility built next to the existing building.
"Both areas presented challenges" explains Paul Russon of Prihoda. "The sports hall is very high and required for badminton games, creating a long throw but low velocity design - difficult with multiple air densities at different supply conditions. The canteen ventilation system needed to heat a large space, deliverying air over a wide area without draughts."
Working with NG Bailey, Prihoda was involved in the design of the diffusers and air patterns to achieve optimum conditions within each area.
Prihoda specified a non-permeable wipe clean material to deliver the air for the sports hall. The hall was heating or tempered fresh air only and would never fall below dew point, so permeable material (to avoid condensation) was not required.
One central diffuser entrained and moved air towards the walls where the two diffusers, one along either wall, delivered supply air to low level whilst inducing large volumes of ambient air into the overall air pattern. The result was high volumes of air movement and circulation but low velocity within the court areas.
Prihoda used its specially manufactured polyester material in the canteen to create four half round diffusers suspended between lay-in-grid ceiling rows. Colours were chosen to match the overall scheme. These diffusers deliver air through a mixture of tiny micro-perforations and large laser-cut perforations laid in blocks upon the duct circumference to create inductive air patterns.
Predictive software used by Prihoda ggenerates air flows and velocity predictions that allow them to map and modifty the air patterns as dictated by project requirements.