Double Deflection Supply Air Registers shall be Holyoake Model DDL-20 and shall be of extruded aluminium construction, with 20mm True Airfoil Shaped individually adjustable Horizontal Front and Vertical Rear Blades of no greater than 20mm centres.


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About Holyoake

Founded in 1953, the Holyoake group remains in private ownership with a strategic board of directors.

Operations are directed from its Corporate Headquarters in Auckland, New Zealand.

Holyoake Industries now operates manufacturing facilities in Auckland, Wellington, Christchurch, Melbourne, Sydney, Brisbane & Adelaide with a sales office located in Perth.

The Holyoake product range has now grown to over two hundred different products. Holyoake Industries is the leader in Fire, Smoke and Volume Control with the most comprehensive and diverse range, VAV terminals and Electronically controlled VAV diffusers and the most innovative range of Air Diffusion Equipment in the industry today. The Company is unceasing in the development and redevelopment of its range of products to ensure they continue to reflect the needs on the HVAC industry.