Exceptionally slim frames, maximum viable glass coverage and airtight seals all contribute to ensuring that OB36+ can meet a highly efficient 0.9 U-Value.
Building Regulation Requirements*
New Build Limiting Value
1.6 W/m2K
Replacements
1.4 W/m2K
Energy Rating
C or better
*All doors must conform to these requirements
Glazing
U-Value
1.2 Centre Pane
1.1 Centre Pane
1.3 W/m2K
0.9 Centre Pane
1.1 W/m2K
0.6 Centre Pane
0.9 W/m2K
0.5 Centre Pane
0.8 W/m2K
Weather Rating
2,500mm>
Air Permeability
Class 4, 600pa
Resistance to Wind Load*
Class A3, 1,200pa
Water Tightness
Class 9A
*Dependent on the sash width. Please see OSS for more information.
Performance Testing
PAS 24
BS 6375 Parts 1, 2 and 3
Passed 50,000 lead door cycles and 10,000 full cycles, equating to 25-years of use.
Sash Sizes
Width
Height
Minimum Sash Size
600mm
1,850mm
Maximum Sash Size
1,200mm*
2,376mm
* Maximum sash weight - 76kg (this is dependent on the lateral loading)
Set Sizes
Minimum Set Height
1,974mm
Minimum Set Width
702mm
Maximum Set Height
2,500mm
Maximum Set Width
6,000mm
Maximum steel deflection - 3mm