System 17 Concealed Vent

System 17 Concealed Vent Curtain Walling

Metal Technology polyamide concealed vent has been designed to combine with curtain walling systems to offer top hung opening casement windows that blend seamlessly with the curtain walling façade.

The concealed vent can be incorporated with Metal Technology's standard capped System 17, System 17 Latitude, and System 17 SP to provide a frameless opening vent.


Performance Overview

Weather Performance

Air Infiltration BS EN 1026Class 4
Watertightness BS EN 1027Class E900
Wind Resistance BS EN : 12211Class E2400

Size Limitation

Vent WidthVent HeightVent Weight
Top Hung Concealed Vent2500mm2500mm180Kg

BREEAM Sustainability Rating

B Rating


Materials

Aluminium profiles are extruded from aluminium alloy 6060T6, T5 or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755 Parts 1 to 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:

  1. Anodised to BS 1615 or BS 3987 or BS EN 12373-1
  2. 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

The system can accommodate a variety of different glazing thicknesses. Glass is structurally bonded to the vent profile by specialist silicone applicators.

Materials

Aluminium profiles are extruded from aluminium alloy 6060T6, T5 or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755 Parts 1 to 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:

  1. Anodised to BS 1615 or BS 3987 or BS EN 12373-1
  2. 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

The system can accommodate a variety of different glazing thicknesses. Glass is structurally bonded to the vent profile by specialist silicone applicators.


Thermal Performance

Metal Technology’s Concealed Vent, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations.

System 17 Concealed VentU-Frame Values System 17 Concealed Vent (32mm)
Outer frame and Vent2.33 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-valueCentre pane U-value
1.0 W/m2K0.6 W/m2K
Outer frame and Vent1.40 W/m2K1.10 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.

 

 


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