System 5-20D Hi+

High Performance Thermally Enhanced Door System

Metal Technology’s System 5-20D Hi+ offers the designer a wide and diverse range of profiles that will provide structural integrity, weather performance, thermal enhancement, and security. Now a highly cost-effective entrance door solution, the System 5-20D Hi+ complies with both BS 6375 and PAS 23/24. Security testing covers standard, panic and electric release options.

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 E2400


Information above is based on single leaf open out fully rebated door.


This system  has passed PAS 24 "Enhanced Security Performance Requirements for Door Assemblies" as generally accepted on Secure by Design projects.

Size Limitation


Door Sash


Door Sash Width

Door Sash Height



1000mm max

2400mm max

650mm min

1961mm min



*900mm max

2400mm max

*650mm min

1961mm min


*Width is based on the individual sash width. Maximum door weight with 3 hinges 90 Kg.

BREEAM Sustainability Rating

A+ Rating

Thermal Performance

Metal Technology's range, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations. The polyamide thermal break profiles have been specifically designed to minimise heat transfer across the door profiles.

Thermal performance is further improved through the introduction of specially designed foam profiles. These reduce radiation heat loss across the air cavities within the door profiles to provide additional thermal enhancement.


U-Frame Values

5-20D Hi+   U-frame Values

Outer frame

1.91 W/m2K

Outer frame and sash

2.178 W/m2K

The following table, based on a standard single door designed to comply with current DDA requirements (1100mm x 2100mm sash size) and using warm edge spacers, demonstrates how such improved U-frame values then contribute to improving the overall performance of a complete door.

Achievable whole
door U-value
Centre pane U-value

1.1 W/m2K

0.6 W/m2K

5-20D Hi+ glazed-in sash

1.61 W/m2K

1.30 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.


Aluminum 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 thermal breaking.


Frame and door sash members are mitre cut at 45°. Corners are reinforced with extruded aluminium crimping cleats and corner braces. 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.


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

Metal Technology's powder coating is produced to Qualicoat standards.


This system offers internally glazed sashes and can accommodate glazing units from 24mm to 34mm units.

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