A74 Rooflights
The Best Performing Aluminium Rooflight System - Vitral A74
Product highlights:
- PERFORMANCE
Vitral's new A74 rooflight system has been designed with high performance as a standard, it provides the lowest overall system U-value available of 1.6 W/m²K.
If you want a solution that is hot box tested, with U-value calculations for every project proving its compliance with Part L that will meet your budget contact Vitral's design team.
- NATURAL VENTILATION
As with Vitral's permier system, the VRS system, The A74 does not have a carrier frame as with patent glazing or curtain walling. This means every panel is capable of opening without the need for extra framing, so maintaining low u-values, controlling costs and maximising the amount of daylight through the system.
- FULL LIFE SAFETY FIRE VENTILATION (EN12101)
A standard feature that Vitral adopts is ensuring its system comply with EN12101-2:2003 legislation for smoke ventilation.
Vitral has developed rooflight systems that perform, use the matrix below to choose the system you need:
| Features | VRS System | A74 System | Benefits |
| Construction | Stainless Steel | Aluminium | High quality construction that provides long term life expectancy and will not deteriorate |
| Colour | Self coloured stainless steel (film coated option) | Anodised aluminium or ppc to any RAL | Both stainless steel and anodised aluminium blend in with other materials, both internally and externally but colour can be added to match other aspects or to comply with planning requirements |
| Typical U-Value | 1.54w/m2K | 1.6w/m2K | Part L requires 2.2w/m2K max, recommended 1.8w/m2K |
| Section Width | 47mm | 50mm | Minimal frame means maximum light and reduces U-Value |
| Section Depth | 95mm | 74mm | |
| EN12101-2 Smoke Ventilation | Yes | Yes | Removes the need for proprierty smoke vents |
| Additional Frame For Opening Vents | No | No | No visible external difference between opening panels and fixed panels |
| Self Supported Double Pitch | Yes | Yes | Minimal frame means maximum light and reduces U-Value |
| Air Permeability | Class 4 at 600 Pa | Class 4 at 600 Pa | Complies to EN12207 |