Fakro FTT U6
Triple-glazed FTT-U6 high performance roof window. The external and middle panes are toughened, the internal being laminated (safety glass) classP2A. The whole unit incorporates two layers of low-emission coating and warm TGIspacers. Inter-pane voids are filled with inert argon. Such structured glazing units offers very good thermal performance - Ug = 0.5 W/m²K. For excellent airtightness the FTTwindow range is equipped with a quadruple sealing system made of flexible TPE material.
Uw of 0.80 W/m²K when fitted with EHV-AT THERMO flashing kit.
- Double coated wood with ecological acrylic lacquer in natural colour.
- Increased resistance to burglary - topSafe system.
- A wide range of accessories.
- Suitable for roof pitches 15 to 70 degrees.
"Obtaining rooflights that meet the requirements of Passivhaus design has until recently been near impossible. Whilst invaluable in designing in additional light to a building the dangers of over-heating can not be overlooked . On south faces particularly provision must be made in the form of blinds to prevent this happening. "
We would recommend that for new build Passivhaus the more cost-effective, FTT U6 would be adequate to meet the standard and would avoid using a window containing krypton. The FTT U8 would however be of use where design constraints are already pushing the annual heat demand close to15kWh/m².a and where there is no other cost-effective design solution.
Exterior aluminium colour of rooflights is RAL 7022. Conservation variants are finished in RAL 9005.
- Brand: Fakro
|Uw [W/m²K] (with EHV-AT Thermo flashing)||0.81|
|Acoustic insulation Rw [dB]||35|
|Linear thermal transmittance frame and glazing unit (spacer Ψ value) [W/mK]||0.043|
|Solar radiation co-efficient g-value (EN 410)||0.44|
|light transmittance τv (EN 410)||0.59|