A surface-mounted window ventilator from Greenwood Window Vents has helped fabricator Drayton Windows achieve BS7412 accreditation for its Corona Casement Window system. Drayton used the slimline D-Vent from the Slotvent range which provides a free area of 4,000m 2. This offers unobtrusive ventilation and includes an internal controllable mechanism and an external weather-protected grille.
FOCUS ENQUIRY NO. 902