The slot ventilator is surface mounted on all types of windows and is available in any size and finish for slot heights up to 12 mm. The vent allows for upward ventilation, this to avoid undue draught, and is available for controllable ventilation.
A special hood is designed to be surface mounted upside down to provide upward deflected air for permanent ventilation. The hood offers weather protection and is available with 2 types of fly screen : 3 x 4 mm or 8 x 6 mm apertures (for domestic fuel burning applications).
Document F - Introducing EA
Our strong performing aluminium trickle vents have been especially developed to meet the requirements of Approved Document F - Means of Ventilation (April 2006 UK). The new Part F (UK) document typically requires 2500 Equivalent Area (EA) for kitchens, utility rooms and bathrooms and 5000 EA for habitable rooms (depending on the ventilation system applied). EA refl ects better the volume of air that will fl ow through an opening for a given pressure difference. Trickle vents also need to be controllable and the EA should be clearly marked on the vent. Gas ventilation applications still use ‘Free Area (FA)’.
Equivalent Area (EA) 2500 mm2
Airfl ow at 1 Pa is 2,3 dm3/s * , Airfl ow at 2 Pa is 3,2 dm3/s , Airfl ow at 4 Pa is 4,5 dm3/s *, Airfl ow at 6 Pa is 5,6 dm3/s *
Slot height | Slot width | Number of slots | Number of bridges | Width of bridge | Recommended length of SlimLine |
---|---|---|---|---|---|
12 mm | 245 mm | 1 | 0 | 0 mm | 300 mm |
11 mm | 250 mm | 1 | 0 | 0 mm | 300 mm |
10 mm | 255 mm | 1 | 0 | 0 mm | 300 mm |
9 mm | 260 mm | 1 | 0 | 0 mm | 300 mm |
Equivalent Area (EA) 5000 mm2
Airfl ow at 1 Pa is 4,6 dm3/s *, Airfl ow at 2 Pa is 6,5 dm3/s *, Airfl ow at 4 Pa is 9,1 dm3/s *, Airfl ow at 6 Pa is 11,2 dm3/s *
Slot height | Slot width | Number of slots | Number of bridges | Width of bridge | Recommended length of SlimLine |
---|---|---|---|---|---|
12 mm | 245 mm | 2 | 1 | 15 mm | 600 mm |
11 mm | 255 mm | 2 | 1 | 15 mm | 600 mm |
10 mm | 265 mm | 2 | 1 | 15 mm | 600 mm |
9 mm | 270 mm | 2 | 1 | 15 mm | 600 mm |
* 10% tolerance included
Tested according to BS EN ISO 717-1. Test reports on request.