- What are the common sizes for Dampers and Smoke Shafts?
There’s no standard size but the most common sizes are below. Dampers – 800w x 1920h Doors – 1000w x 1500h Shaft – 850×1800 or 1000m x 1500m throat size
- How far should a Roof AOV open?
For single vents the vent will need to have an opening angle of at least 140°. Twin vents that are installed side by side should have each leaf open to at least 90°. This is primarily to reduce damage caused by wind and to ensure adequate airflow.
- Can I use an AOV rooflight as an access hatch?
Yes, we’re able to supply the roof hatch with an offset motor assembly. This will allow you to place a ladder alongside and gain access to the roof when the hatch is open.
- What is BS EN12101-2?
BS EN12101-2 is a European standard that specifies the requirements and test methods for natural smoke and heat exhaust ventilators (NSHEVs). The standard covers the design, performance, installation, and maintenance of NSHEVs.
- Are louvres and dampers the same thing?
No, louvres are typically installed on the external areas of buildings such as roofs and external walls. Dampers conform to a much higher fire rating standard (BS EN 12101-8) and have superior fire resistance. Dampers are typically used where a lobby or corridor joins a smoke shaft, they are covered by a grill to maintain an aesthetic appearance.
- What is EN 12101-2?
It’s a standard that specifies the requirements, test methods and labelling for natural, smoke, and heat exhaust ventilators. These devices are installed as part of a natural smoke and heat exhaust (NSHEV) system to remove smoke and heat from a building in case of fire. Tests may include wind tunnels, B300 fire test chambers as well as quality control.
