Smarts Systems
Alitherm 400
- Fully compliant with changes to Document L of the building Regulations
- Smart Quick-Glaze Beads featuring integrated gasket and ‘tap-in’ design for easier fabrication and faster installation
- PAS 24:2016 Approved – enhanced security for aluminium windows and doors
- Unrivalled Choice of Colour
- Suitable for Residential and Light Commercial Properties
Looking to enhance your home or commercial space with a stunning and high-performance aluminium window and door system? Look no further than the Alitherm 400 – the ultimate solution for anyone who demands the best of everything.
Crafted from top-quality materials and designed to deliver long-lasting performance, the Alitherm 400 is the perfect choice for anyone looking to upgrade their space with a sleek and modern window and door system.
One of the key benefits of the Alitherm 400 is its exceptional design. With slimline aluminium frames, this window and door system offers maximum natural light and an unobstructed view of the outdoors, creating a modern and stylish look that is sure to impress.
But the Alitherm 400 isn’t just about aesthetics – it’s also designed to provide you with unparalleled performance. With advanced thermal insulation technology, this product helps to keep your space warm in the winter and cool in the summer, reducing your energy bills and helping you to do your part for the environment.
Another key selling point of the Alitherm 400 is its durability. Built to withstand even the toughest weather conditions, this window and door system is designed to provide you with years of reliable use, ensuring that your investment is protected for the long term.
In addition to its sleek design and performance benefits, the Alitherm 400 is also incredibly versatile. With a range of customization options available, including various finishes and multiple panel configurations, this window and door system can be tailored to meet your specific design preferences and requirements, ensuring that you get the perfect fit for your space.
Finally, the Alitherm 400 is designed with ease of use and low maintenance in mind. With smooth and effortless operation, this product is built to provide you with hassle-free access to the outdoors, while requiring little upkeep.

Material | Aluminium Polyamide | ||
Dual Colour | Yes | ||
Thermally Broken | Yes | ||
NBS Available | Yes |
Side Hung Max Width (mm) | 864 |
Side Hung Max Height (mm) | 1400 |
Top Hung Max Width (mm) | 1400 |
Top Hung Max Height (mm) | 1500 |
Fixed Max Width (mm) | 2100 |
Fixed Max Height (mm) | 2100 |
Slingle Door Max Width (mm) | 1100 |
Slingle Door Max Height (mm) | 2400 |
Double Door Max Width (mm) | 2200 |
Double Door Max Height (mm) | 2400 |
Glazing (mm) | 24, 28, 32, 36, 40 & 45 |
Frame Depth (mm) | 70 |
WER Rating | A+ |
uValue | 1.4 |
Document L Compliant | Yes |
Alitherm 400 Doors
Door Type | Max Width (mm) | Max Height (mm) | Frame Height | Glazing (mm) | Security | Typical U Value | DSER | Air | Water | Wind |
---|---|---|---|---|---|---|---|---|---|---|
Single Open In | 1100 | 2400 | 70 | 24,28,32,36,40 &45 | PAS 24:2016 | 1.4 | Band B | Class 4 600Pa | Class 3A 100Pa | Class C3 1200Pa |
Double Open In | 2200 | 2400 | 70 | 24,28,32,36,40 &45 | PAS 24:2016 | 1.4 | Band B | Class 4 600Pa | Class 3A 100Pa | Class C3 1200Pa |
Single Open Out | 1100 | 2400 | 70 | 24,28,32,36,40 &45 | PAS 24:2016 | 1.4 | Band B | Class 3 600Pa | Class E 900Pa | Class C3 1200Pa |
Double Open Out | 2200 | 2400 | 70 | 24,28,32,36,40 &45 | PAS 24:2016 | 1.4 | Band B | Class 3 600Pa | Class E 900Pa | Class C3 1200Pa |
Alitherm 400 Windows
Window Type | Max Width (mm) | Max Height (mm) | Frame Depth (MM) | Max Perim (MM) | Glazing Units | Security | Typical U Value | WER | Air | Water | Wind |
---|---|---|---|---|---|---|---|---|---|---|---|
Side Hung | 864 | 1400 | 70 | – | 24,28,32,36,40 &45 | PAS 24:2016 | 1.4 W/m2K | Band A | Class 4 | AE2400 | 2000+ |
Top Hung | 1400 | 1500 | 70 | – | 24,28,32,36,40 &45 | PAS 24:2016 | 1.4 W/m2K | Band A | Class 4 | AE2400 | 2000+ |
Fixed | 2100 | 2100 | 70 | 42 | 24,28,32,36,40 &45 | PAS 24:2016 | 1.4 W/m2K | Band A | Class 4 | AE2400 | 2000+ |
Heritage Windows
Window Type | Max Length (mm) | Max Height (mm) | Max Area (m2) | Friction Stays (up to & inc) | Transom/Mullion Len (mm) inc Frame Max | Air Permeability Classification | Watertightness Classification | Resistance to Wind | Exposure Cat. as given in Table 1 of BS 6375-1:2009 |
---|---|---|---|---|---|---|---|---|---|
Projecting Top Hung Int Bead | 1400 | 1400 | – | 24″ | – | 4 | 7A | AE2400 | 2000+ |
Projecting Top Hung Ext Bead | 1400 | 1400 | – | 24″ | – | 4 | 5A | AE2400 | 2000+ |
Projecting Side Hung Int Bead | 600 | 1400 | – | 16″ | – | 4 | 7A | AE2400 | 2000+ |
Projecting Side Hung Ext Bead | 600 | 1400 | – | 16″ | – | 4 | 5A | AE2400 | 2000+ |
Fixed Int Bead | 2100 | 2100 | 4.2 | – | – | 4 | 7A | AE2400 | 2000+ |
Fixed Ext Bead | 2100 | 2100 | 4.2 | – | – | 4 | 5A | AE2400 | 2000+ |
Multilights W20035 T/M Int Bead | 2100 | 2100 | 2.5 | – | 1450 | 4 | 7A | AE2400 | 2000+ |
Multilights W20035 T/M Ext Bead | 2100 | 2100 | 2.5 | – | 1450 | 4 | 5A | AE2400 | 2000+ |