A full range of exceptionally high performance HIGH HEAT natural roof extract ventilators, proven on numerous installations throughout the world over 40 years.

Full scale tests prove supreme aerodynamic efficiency with Cd of 0.67. HCD’s are constructed from profiled sheet metal fixed to galvanised steel frameworks in continuous runs down the length of the building. The ventilators have fixed or operable dampers using pneumatic or electric actuators.

A wide range of materials and finishes are available