Alitherm 400




To learn more about the Alitherm 400 Window & Door System

Combining outstanding value and quality, with class-leading performance and security, the new Alitherm 400 system provides a range of stylish casement windows and single and double doors.

The system is perfect for a wide variety of projects, including both new build and refurbishment, residential and light commercial applications and is proudly made in Britain by Smart. Alitherm 400’s design incorporates Smart’s innovative polyamide thermal break technology, which creates a barrier between the cold air outside and warm air inside, significantly reducing thermal transmittance and enhancing the system’s overall U-value. The system is also fully compliant with changes to Document L of the Building Regulations, is rigorously tested to PAS 24:2016 as standard and exceeds the requirements for weather resistance and security performance.

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Alitherm 400 Windows

The Alitherm 400 window is the first thermally broken aluminium system to feature Smart’s pioneering co-extruded glazing gasket. This means the beads are supplied with the glazing gasket post-extruded into the profile. This enables the Quick-Glaze beads to be simply tapped in on-site, significantly reducing fabrication and installation time.

Available with a flush or chamfered profile, the slim lines of Alitherm 400 provide excellent weather and thermal performance, as well as the security assurance provided by PAS24 accreditation. While the flush, flat face option is suitable for off-set, face-mounted espagnolette locks, the chamfered design features a eurogroove, to enable in-line espagnolette locking mechanisms to be used.

Did You Know You Can Use the Integral Blinds’ Innovative Range of Control Systems on The Alitherm 400 Windows?

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Alitherm 400 Doors

Alitherm 400 doors perfectly complement the window range, with the same stylish lines and providing the same ease of fabrication and installation.

Available as open-in or open-out, single or double doors, the system provides excellent weather and thermal performance, as well as the security assurance provided by PAS 24:2016 accreditation. Security options include a choice of key wind, lift lever or slam lock multipoint locks.

Suitable for both residential and commercial applications, Alitherm 400 can also be combined with Smart’s Designer Door Panels and the company’s range of standard door furniture (including colour-matched lever handles, and the Quantum range of stainless steel hardware), to create elegant and contemporary entrance doors.



Features & Specifications

Building Regulations Compliant – Fully complies with changes to Document L of the Building Regulations

Quick-Glaze Bead – Making the installation and glazing process faster, more straightforward and more cost effective.

Excellent Thermal Performance  – An extended polyamide thermal break for enhanced thermal performance

Suitable for All Lock Types – Suitable for off-set, face-mounted espagnolette lock mechanisms

PAS 24:2016 Approved – Enhanced security for aluminium windows and doors



Get in Contact Todayalitherm-system-on-house

Contact Stratus Lantern Roofs if you’d like to install the Alitherm 400 windows, doors or any of our classic conservatory roof systems in homes in your local area. We are based in Leicester and work with companies right across England.

You can get in touch by leaving us your details on our online contact form. Alternatively, you can call us directly on 0116 253 7297. We look forward to hearing from you.