Alitherm Heritage Windows
A modern aluminium solution for listed buildings, heritage homes and refurbishment projects. Maintain the character and integrity of a period property with Smart Alitherm Heritage, where the requirement to replace old steel windows is essential. With their modern design and energy efficient features, Alitherm Heritage windows offer the perfect combination of traditional aesthetics and exceptional performance.
- Side Hung Max Width: 600mm
- Side Hung Max Height: 1400mm
- Top Hung Max Width: 1400mm
- Top Hung Max Height: 1400mm
- Fixed Max Width: 2100mm
- Fixed Max Height: 2100mm
- Glazing Options: 24mm, 28mm, 32mm & 36mm
- Double or triple glazed units available
- 47mm Frame Depth
- Typical Sightlines: 59mm
- Typical U-value 1.6 W/m²K (using correct glass unit)
- WER Rating: B
- PAS 24:2016 and Document L Compliant
- BS Kitemarked to BS 6375-1:2009 and BS 4873
U-Value
47mm frame depth
59mm sightlines
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Product Gallery
Colours and Finishes
Our range of Smart Systems products are available in over 200 RAL colours, as well as textured finishes and foils from Smart’s carefully curated collections. Plus, because they’re powder-coated, durability is never an issue. The colour is baked on, providing a lasting finish that won’t peel off or fade, and is guaranteed for 25 years.
Titanium Grey
Storm Grey
Steel Grey
Silver Grey
Golden Beach
Gold Pearl
Bronze
Black
Product Specifications
Explore Our Window Systems
Alitherm 400
Featuring Smart’s innovative co-extruded glazing gasket for quicker installation, the Alitherm 400 offers versatile configurations and compliance with PAS 24:2022 and Building Regulations Document L, ensuring superior security and thermal insulation for residential and commercial applications.
Alitherm 600
Our most popular window, the Alitherm 600 combines modern thermal break technology with flexible design configurations, ensuring energy efficiency and compliance with Building Regulations, making it perfect for residential and light commercial projects.
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Want to know more?
Are Alitherm Heritage windows suitable for listed buildings?
Yes, Alitherm Heritage windows are specifically designed for heritage and refurbishment projects, including listed building renovations. They offer a modern and energy efficient solution while maintaining the aesthetic integrity of the building. Where the requirement to replace old steel windows is essential, Alitherm Heritage windows are the perfect choice.
What are the security features of Alitherm Heritage windows?
The Alitherm Heritage series is designed to meet modern security standards. It has been tested to PAS 24:2016 for casement windows and fixed lights, ensuring high levels of security. The system also includes options for 316 marine grade stainless steel hardware in heritage or art deco styles, combining beautiful aesthetics with robust security features.
Are Alitherm Heritage windows thermally efficient?
The Alitherm Heritage system is designed to provide excellent thermal performance. With an extended polyamide thermal break, the windows can achieve U-values of 1.6 W/m²K when using glass units with U-values of 1.0 W/m²K. This makes the Heritage series compliant with modern energy efficiency standards, helping to reduce heating and cooling costs while maintaining a comfortable indoor environment all year round.
What glazing options are available for Alitherm Heritage windows?
Alitherm Heritage windows can accommodate a range of glazing options, including double and triple glazing, as well as obscure, laminated and toughened glass. The glazing thickness ranges from 24mm to 36mm, depending on the specific design and requirements. These options provide flexibility in terms of thermal performance and privacy, making the system suitable for various applications.
What are the advantages of aluminium windows over traditional steel windows?
Aluminium windows offer several advantages over traditional steel windows. Aluminium windows are able to provide superior thermal efficiency due to polyamide thermal breaks that reduce heat transfer. They are also more durable, as aluminium is resistant to rust and corrosion, requiring less maintenance than steel. Additionally, aluminium windows provide greater aesthetic flexibility, with various colour and finishing options, and their lightweight yet strong nature allows for larger glass areas with slimmer frames.