Heritage aluminium window and door systems for steel window replacements

Heritage aluminium windows and doors are designed to faithfully replicate the appearance of traditional Crittal steel windows. They are a popular choice in listed building and conservation area property renovations and meet all the requirements of current Building Regulations.

Smart Alitherm Heritage window and door systems can be specified as casement windows, tilt and turn or fixed windows, and can also be used to create single or double doors. They feature polyamide thermal break technology for enhanced thermal performance and can accommodate a single or dual colour powder coat finish with marine grade resistance as standard.

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CDW Systems Limited manufacture and supply high quality aluminium window, door, and curtain wall products for trade installers across the UK. We manufacture a range of unglazed products to suit most applications using profiles from some of the most respected aluminium systems companies in the UK. As well as traditional domestic applications, our products have been installed in a variety of commercial applications including the Education, Healthcare, Retail, and MOD sectors.

CDW Systems offer a flexible approach to trade supply. From small-scale projects for a single window or door, to full commercial contracts.


Frame depth 47mm
Appearance Slimline profiles with Heritage and Art Deco hardware options
Locking Face-mounted shoot bolts and multi-point locking
Glazing 24, 28, 32, & 36mm double or triple glazed units
Window Energy Rating B
Certification British Standard Kitemark KM 81543 & KM 81580, Security tested to PAS 24:2016 (casement windows & fixed lights only)


Alitherm Heritage profile

The Smart Alitherm Heritage range is designed as a replacement for traditional steel windows. A series of horizontal modules are stacked using horizontal couplers to create a multi-part window. A specially designed drip bar is used to enhance weather protection.

Alitherm Heritage doors are tape or gasket glazed with a maximum sash width of 900mm and a maximum sash height of 2100mm.

Alitherm Heritage windows can be top hung, or side hung with a maximum height of 1400mm (both configurations) and a maximum length of 1400mm (top hung) and 600mm (side hung)



Smart: Alitherm Heritage windows and doors

Smart Alitherm Heritage windows and doors are the perfect choice for both period property renovation projects and large-scale replica refurbishments.

They can achieve U-values as low as 1.5 W/m²K and achieve a ‘B’ rating for thermal efficiency performance.

They are compliant with Building Regulations Document L and can be specified with a range of textured and anodised finishes.

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