Alitherm Heritage
Windows & Doors
Heritage Doors & Windows
Introducing our sleek Heritage Aluminium Window and Door system, a cost-effective alternative to traditional steel windows and doors. Achieve the coveted industrial or heritage aesthetic with unparalleled thermal performance.
Ideal for heritage applications such as the restoration of listed buildings and extensive replica-refurbishment projects, our Heritage system seamlessly navigates planning constraints.
Crafted as a series of horizontal modules, our window and door system allows for versatile stacking using horizontal couplers, creating a sophisticated multi-part window or screen. This design includes a specially engineered drip bar between modules for added functionality.
Explore our diverse range of transom options, ranging from the standard fixed transom to Fenstra Overlap Astragal Bars featuring Floating (Island) Lockblocks. Elevate your architectural vision with our Heritage Aluminium Window and Door system.

Product Details
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MaterialAluminium Polyamide
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Dual ColourYes
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Thermally BrokenYes
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NBS AvailableYes
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WER ratingB
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U Value1.5W/m²K using 1.0 W/m²K centre pane
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Doc L CompliantYes
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BS6375-1:2009Yes
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BS4873Yes
Description
Alitherm Heritage profiles utilise Smart’s innovative polyamide thermal break technology which creates a barrier between the cold air outside and the warm air inside. This technology significantly reduces thermal transmittance and enhances the overall U Value of a product and is designed to meet the exacting requirements of Document L 2010.
Alitherm Heritage products are available in a choice of standard or non-standard colours, including metallic, dual colour, Smart’s Sensations textured, and Alchemy anodised effect finishes.
Please note, Alitherm Heritage has been tested to PAS 24: 2016 for casement windows and fixed lights only.
Alitherm Heritage Window: Design Limitation and Performance
- Security tested to PAS 24:2016 (casement windows & fixed lights only)
- Weather tested to BS 6375 Part 1:2009
- British Standard Kitemark KM 81543
- British Standard Kitemark KM 81580
- Fixed windows,tilt turn, side hung or top hung open out casements
- Polyamide thermal break provides enhanced thermal performance
- Designed as a direct replacement for steel windows
- Single or dual colour, marine quality polyester powder coat as standard
- 316 Marine Grade Stainless Steel Hardware options
- Heritage and Art Deco hardware options
Special Hardware Options

Art Deco Door Handle

Art Deco Window Handle

Monkey Tail Window Handle

Bulb End Window Handle


Black Heritage Aluminium Doors

Heritage Curved Head Windows
Dimensions
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Side Hung Max Width
600mm
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Side Hung Max Height
1400mm
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Top Hung Max Width
1400mm
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Top Hung Max Height
1400mm
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Fixed Max Width
2100mm
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Fixed Max Height
2100mm
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Single Door Max Width
900mm
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Single Door Max Height
2100mm
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Glazing
24, 28, 32 & 36 double or triple glazed units
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Frame Depth
47mm
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Typical Sightlines
59mm

Smart Systems Alitherm Heritage Doors and Screens

Smart Systems Alitherm Heritage Doors and Screens

Internal Heritage Single Door with Goal Post Frame

Alitherm Heritage Internal Double Doors

Alitherm Heritage Curved Head Windows

Aluminium Heritage Double Doors and Sidelight

Aluminium Heritage Double Door Screen

Grey Heritage Kitchen Doors and Windows

Floating Lockblock Heritage Aluminium Doors

Black Heritage Curved Windows

Alitherm Heritage Windows

Black Heritage Windows

Black Aluminium Curved Head Window

Black Heritage Windows

Black Heritage Windows at Old Town

Black Heritage Windows at Old Town

Heritage Doors

Heritage Bifold

Grey Heritage Bifold Doors in our Showroom

Heritage Bifold with 20mm Astragal Bars

Showroom Heritage Doors, Bifold and Patio

Showroom Heritage Doors and Windows

Fenestra overlap astragal bars
