The free area is approximately 7500mm2

Lead flat top roof vents offer an attractive, long lasting, functional method of adding ventilation to a building. The low maintenance, durable vents come with a range of spigot sizes to ventilate a roof void. Alternatively they can attach to mechanical extraction systems via flexible ducting. They offer a high quality, sustainable method of adding ventilation to your roof.

Specification Sheet

Flat Top Vent Specifications