Product Specification

Wide range of high quality, thermally-broken window options.

Alitherm Heritage Window

Alitherm Heritage provides the ideal solution for heritage applications such as listed building renovations and large scale replica-refurbishment projects where planning constraints are to be considered.

The Alitherm Heritage window is designed to be built as a series of horizontal modules which can be stacked using horizontal couplers to form a multi-part window featuring a specially design drip bar between modules.

Application

• Fixed windows
• Single or double sash, side hung open out casements
• Top hung open out casements
• Tilt & turn windows
• Pivot windows*

Features

• Polyamide thermal break provides enhanced thermal performance
• Designed as a direct replacement for steel windows

Finish

Single or dual colour, marine quality polyester powder coat as standard

Technical Performance

• WER Rating B
• BRE Green Guide (Commercial) A+
• U Value 1.5 W/m2K (using sealed unit 1.0 W/m2K)
• Air Class 4, 600Pa
• Water Class 9A, 600Pa
• Wind Class AE, 2400Pa
• Document L Compliant
• Dimensions
• Frame Depth 47mm
• Glass 24mm, 28mm, 32mm & 36mm

Test Certification

• BS 6375 Part 1 2009 Resistance to Weather

Recommended Design Limits

• Side Hung Vent Max o/a Width 700mm
• Side Hung Vent Min o/a Width 300mm
• Side Hung Vent Max o/a Height 1400mm
• Top Hung Vent Max o/a Width 1400mm
• Top Hung Vent Max o/a Height 1300mm
• Top Hung Vent Min o/a Height 275mm
• Maximum Vent Weight 40kg