Performance Overview
Weather Performance
| Independently weather performance tested to BS 6375-1 | |
| Air Infiltration BS EN 1026 | Class 4 |
| Watertightness BS EN 1027 | Class 9A |
| Wind Resistance BS EN 12211 | Class E2400 |
Size Limitation
| Max. Vent Weight | Vent Width | Vent Height |
| Horizontal Pivoting Sashes | ||
| 100 Kg | 1800mm max | 1800mm max |
| 500mm min | 600mm min | |
| Vertical Pivoting Sashes | ||
| 100 Kg | 1800mm max | 1800mm max |
| 950mm min | 500mm min | |
Note that maximum height and maximum width cannot be achieved simultaneously.
For complete details of maximum/minimum sizes, handle positions and weight restrictions, see the size limitation charts in Metal Technology’s technical literature.
BREEAM Sustainability Rating
A+ Rating
Materials
Aluminium profiles are extruded from aluminium alloy 6060T6, T5, or T4 complying with the recommendations of BS EN 12020/BS EN 755 Parts 1-9. Polyamide thermal breaks are produced from glass reinforced nylon sections designed to withstand temperatures in excess of 200°C, allowing the sections to be powder coated after thermally breaking.
Construction
Frame members are mitre cut at 45°, corners are reinforced with extruded aluminium crimping cleats and corner braces, and a secure joint is formed by pneumatically crimping into the extruded crimping cleat. Mullion and transom bars are square cut shaped and fixed securely to the frame by means of stainless steel screws and fixing cleats. All frame joints are sealed during construction against entry of water using Metal Technology’s two-part adhesive. Metal Technology recommend that only A2 or A4 Austenitic (300 series/class 70) stainless steel fixing screws are used in the assembly of their products.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
- Anodised to BS 1615 or BS 3987 or BS EN 12373-1
- Powder organic coated to BS 6496 or BS EN 12206-1
This system can accommodate a different colour finish internally to that used externally. Metal Technology's powder coating is produced to Qualicoat standards.
Glazing
This system offers internally glazed sashes and can accommodate glazing units from 24mm to 34mm units. Fixed panes may be externally glazed with the addition of a liner bar profile.
Materials
Aluminium profiles are extruded from aluminium alloy 6060T6, T5, or T4 complying with the recommendations of BS EN 12020/BS EN 755 Parts 1-9. Polyamide thermal breaks are produced from glass reinforced nylon sections designed to withstand temperatures in excess of 200°C, allowing the sections to be powder coated after thermally breaking.
Construction
Frame members are mitre cut at 45°, corners are reinforced with extruded aluminium crimping cleats and corner braces, and a secure joint is formed by pneumatically crimping into the extruded crimping cleat. Mullion and transom bars are square cut shaped and fixed securely to the frame by means of stainless steel screws and fixing cleats. All frame joints are sealed during construction against entry of water using Metal Technology’s two-part adhesive. Metal Technology recommend that only A2 or A4 Austenitic (300 series/class 70) stainless steel fixing screws are used in the assembly of their products.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
- Anodised to BS 1615 or BS 3987 or BS EN 12373-1
- Powder organic coated to BS 6496 or BS EN 12206-1
This system can accommodate a different colour finish internally to that used externally. Metal Technology's powder coating is produced to Qualicoat standards.
Glazing
This system offers internally glazed sashes and can accommodate glazing units from 24mm to 34mm units. Fixed panes may be externally glazed with the addition of a liner bar profile.
Thermal Performance
Metal Technology’s System 7-20, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations.
| System 7-20 | U-frame Values |
| Fixed light outer frame | 2.94 w/m2k |
| Outer frame and vent | 2.73 w/m2k |
The following table, based on a standard commercial GGF window configuration and warm edge spacers, demonstrates how such improved U-frame values then contribute to improving the overall thermal performance of a complete window.
| Achievable whole window U-value | Centre pane U-value | |
| 1.1 W/m2K | 0.7 W/m2K | |
| 7-20 Pivot Window | 1.81 W/m2K | 1.58 W/m2K |
Metal Technology can provide tailored U-value calculations using their dedicated estimating software to calculate overall project average window U-values for their full range of systems.
