Alitherm aluminium windows are premium thermally-efficient windows, that offers great thermal performance for economical heating.
Why choose Alitherm windows ?
Alitherm windows are designed to be an energy-efficient and versatile solution for residential and light commercial installations. Its contemporary window design takes influence from traditional timber frames, making it unobtrusive and a sleek, elegant option for modern spaces.
Alitherm 800 windows rely on polyamide thermal break technology to provide a conduction barrier between internal warm air and external cold air, which significantly reduces heat loss. They’re available in side and top-opening styles, as well as open-out, parallel and reversible top-swing. This makes them perfect for both residential and light commercial installations.
Benefits of Alitherm windows
At Mercury Glazing, we’re proud to manufacture and supply only the highest quality of Alitherm windows. Get in touch with our team today to find the best option for you.
Both the Alitherm 300 and Alitherm 800 windows rely on the same manufacturing technology to offer efficient residential and commercial windows. However, the 800 series offers the highest thermal performance of the Alitherm range.
The 300 is available in glazing sizes between 24mm and 36mm with a frame depth of 53mm or 70mm, whereas the 800 accommodates 24mm or 28mm glazing with a frame depth of 70mm.
Alitherm windows are manufactured by Mercury in our dedicated state-of-the-art manufacturing centre in Gloucestershire, using cutting-edge fabrication processes to deliver exceptional quality on every product. Each frame receives a marine-quality polyester coat to ensure durability against the weather, involving three chromate-free polyester powder coats.
The aluminium windows feature a polyamide thermal break, which is a material manufactured between two pieces of the aluminium frame, made of enduring polyamide. This means your aluminium windows are thermally efficient and will help to retain your building’s internal heat and boost energy efficiency.
You might also like to know that aluminium is 100% recyclable, so when your windows reach the end of their life, the material can be repurposed. In fact, nearly 75% of aluminium ever produced is still in use today
All our Alitherm windows are manufactured using sustainable methods and materials, with the aim of carbon-neutral production in the future.
As previously mentioned, Alitherm 800 is available in different window-opening orientations with different dimension limits.
For side-hung opening orientations:
Max width: 700mm
Max height: 1400mm
Frame depth: 70mm
For top-hung opening orientations:
Max width: 1400mm
Max height: 1300mm
Frame depth: 70mm
Both styles can take double or triple glazing units with a 24mm or 28mm depth.
If you’d like sizes outside of those mentioned, contact Mercury Glazing today to discuss your bespoke needs.
Alitherm’s aluminium windows’ extended polyamide thermal break offers an ‘A’ rating under the Window Energy Rating system. Alitherm aluminium windows offer between 1.5W/m2K and 1.2W/m2K thermal transmittance, also known as a U-value, making them energy-efficient by design.
Mercury Glazing manufacture Alitherm windows within the UK, so naturally they’re ready to take on the Great British weather. As well as the marine-grade polyester coating to prevent corrosion, they also feature high-quality rubber gaskets and weather brushes to prevent water ingress to the frame or window.
These aluminium thermal windows feature frames that come in both traditional and more contemporary finishes. Varieties include metallic, textured, dual-colour and anodised effect finishes. Paint finishes are machine-sprayed to guarantee consistent and precise colour matches on every frame.
Any RAL colour is available for window frames. RAL is a European colour matching system containing a wide range of hues and tones that would suit most colour schemes.
If you have a specific colour in mind but you’re not sure whether it’s available, get in touch with us and we can check on your behalf.
To help consumers understand which windows are economical, the fenestration industry has established window energy rating guides or WER’s from the British Standards Institute.
The WER is a useful guideline for anyone looking to reduce fuel bills or their carbon footprint, and you’ll likely find them similar to the colourful labels that can be found on any new household appliance. WER labels describe the energy efficiency of a window and its frame and give information about thermal transmittance, solar protection, air leakage and an ‘energy index’ which represents the solar heat gains minus the thermal losses.
Thermal transmittance is described as a U-value and represents how easily heat can transfer between sides of the material. A lower number means that a window is more energy efficient, and building standards say that a window should be rated at or lower than 1.6W/m2K. Alitherm windows are rated between 1.5W/m2K and 1.2W/m2K, showing that they exceed minimum efficiency by design.
This high thermal efficiency, combined with durable manufacture and a tough polyester coating means that aluminium thermal windows could potentially help you save money over the lifetime of the window.
How do aluminium windows work?
Aluminium windows are designed to reduce heat transfer between the warm inside and cold outside of residential and commercial properties. This means you can heat your building more efficiently and potentially save money on energy costs. Alitherm windows are manufactured from aluminium with a polyester coating.
While this makes them particularly durable, they need a special construction process to make sure they don’t leak heat to the outside. To ensure they keep your home warm and your bills down, Alitherm windows are constructed with a polyamide thermal break that ensures heat doesn’t get transferred from one side of the frame to the other.
What is a thermal break?
Aluminium is a highly durable and light material that’s excellent for window and door apertures, but it’s also quite conductive meaning that it will lose heat quickly. Because it’s so durable and weather-resistant, it’s a great material for window frames, but needs to be made with a thermal break to prevent it from radiating heat from the inside to the outside of your property. Without a thermal break, the result would be a warm house when it’s sunny and a cold house during the winter months.
Until recently, thermal breaks in aluminium windows were made using a ‘pour and debridge’ method where polyurethane was used as a filler material to prevent the transfer of heat. Now, companies have started to rely on polyamide as it’s much more efficient. Rather than filling a cavity, new methods rely on placing a strip of polyamide between two strips of aluminium. This method results in frames which have a thinner profile and improved energy efficiency.
Thanks to the precision of cutting-edge machines used in the production of Alitherm windows, frame profiles can be as slim as 53mm using this polyamide thermal break technique.
Should I choose Alitherm 300 or Alitherm 800 windows?
Both Alitherm 300 and 800 windows are high quality aluminium products that offer high efficiency when it comes to thermal transmission, making them both a great option for your home or office. The Alitherm 800 is designed for installations that require the highest quality and offers some of the best thermal performance in the range, meeting the new stringent requirements of Document L 2022, the most important standard for building regulations.
Do you have more questions?
At Mercury Glazing, we’re always happy to talk to our customers and to hear about your projects. Contact our team on 01452 383344.
From sash windows to aluminium bifold doors, our superbly manufactured products are engineered right here in Britain. We work with fellow UK-operated companies, Cortizo, Spectus Window Systems, Smart Systems, and Jack Aluminium Systems, to deliver only the very best to our trade, commercial and residential customers.