FTT U8 Thermo* with coefficient Uw=0.58W/m2K (equivalent R-Value 9.8)
FTT U6 – with coefficient Uw=0.8W/m2K (equivalent R-Value 7.1)
* test result for the whole roof window (FTT U8 Thermo) with EHV-AT Thermo flashing testing compliant with EN ISO 12567-2, equivalent R-Value 9.8
Assembled together with E HV-AT Thermo flashings
Topsafe® system of burglary protection as standard
The FTT window with innovative structure ensures excellent thermal insulation performance and large energy savings.
The FTT U8 Thermo window featuring Uw = 0.58 W/m2K (equivalent R-Value 9.8) is the most energy-efficient roof window with a single glazing unit available on the market. It significantly exceeds the energyefficiency requirements for roof windows which will become effective from 2021. The FTT U8 Thermo complies with passive construction requirements, which is confirmed by Passive House certificate.
Application of comprehensive solution ensures fulfilling energy-efficient
function of the window and allows to reduce heat loss as well as bills for heating the building.
22 x 38
30 x 46
30 x 55
|Outside frame|| |
21½ x 38⅝
30¼ x 46½
30¼ x 55
|Rough opening|| |
22½ x 39½
32¼ x 48
32¼ x 56½