ATS reviews the new aïr 20SL sliding door

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Nick Dardalis

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When it comes to minimal frame sliding doors or slimline sliding doors, specialist manufacturers offer a choice of several systems. One of the newest products to hit the market is the aïr 20SL sliding door, manufactured by Everglade Windows.

aïr 20sl sliding door

What is the aïr 20SL sliding door?

Everglade Windows’ aïr 20SL sliding door joins the already successful air 500Ls and 600LS range of sliding doors. Look at the home improvement firms that choose to sell aïr doors, and all are top tier installers with a significant product range and excellent installations to their name. Air sliding and folding doors are quality, highly-engineered doors for the discerning homeowner.

Everglade Windows is one of the longest established aluminium manufacturers in the UK. The new aïr20 SL sliding door is their premium, narrow sight line sliding door featuring a 20mm interlock.

Features and Benefits of the aïr 20LS sliding door.

The aïr 20SL sliding door is suitable for large or small openings giving lots of natural light with a very sleek and unobtrusive appearance thanks to the bare minimum of visible aluminium. As well as the impressive 20mm interlock/vertical mullion, a further option exists to recess the perimeter frame into the structural opening to give a near frameless appearance with over 90% glass surfaces. It is impressive.

The aïr 20SL is unlike a conventional patio door where the structural integrity comes from the aluminium sections. With this type of design, it is the glass that is the core component. For this reason, the doors are manufactured around quality glass units instead of being glazed on site after installation. Only the outer frame can come in kit form for site assembly. It is important to assess and understand how Everglade has approached the supply of this product.

Large sliding doors need special handling and installation. Everglade understands the door industry very well, they have been a big part of it for over 35 years. Everglade knows that the majority of window companies are not ‘Grand Designs’ type home improvement firms. Many use standard size vehicles representing the typical sizes of doors, windows and glass they transport around.

For this reason, the maximum widths available are 1500mm wide. The maximum height is 2800mm. Does this matter where other similar doors are bigger? Not really because for the majority of homeowners considering big sliding doors, these sizes are what most people will reasonably have when sizing their doors.

Everglade is right to consider that offering a door at its maximum sizes would affect transportation of the product and how confident the average yet professional installer will be in handling it. More importantly, Everglade wants their customers to have the confidence to sell it as well without considering cranes, glass lifting equipment and the obvious associated Health and Safety considerations. We think to offer this door a maximum manageable size makes it viable for more installers to consider. It is simpler to buy, more accessible to fit and easier to handle.

The Origin sliding door is also a great door but involves Origin providing specialist training and handling.

This new minimal frame sliding door offers:

  • Slim 20mm interlock.
  • Two, three, four or six panel designs.
  • Maximum height of 2800mm.
  • Available as a minimalist fixed aluminium window.
  • Excellent thermal performance.
air 20 sl sliding doors

How does the air20SL sliding door work?

The aïr 20 SL slides as an inline sliding door meaning the door panels move within the frame and track. Typical of other doors of this type, inline is the only opening and closing method – it does not lift and slide. The door comprises high-tech rollers and mechanisms, meaning even the biggest doors are effortless to slide and move, a feature prominent in Everglade’s other air sliding doors. Air doors are light and effortless in use.

We like how a fixed light is available with this product, giving a similar appearance to modern new extensions that want sliding doors on one elevation and large picture windows on another. We understand the fixed light frame has a minimal frame dimension of under 42mm on the face of the window and is 115mm deep. The fixed window will look great as the glass unit is centrally glazed within the profile and the modern square appearance of the frame overall.

Hardware and colour options.

Handles are an essential part of a sliding door being not only the primary point of contact for locking and sliding but also how they work with the overall look of the door. For the air 20 SL, there is a choice of standard colours available in black, grey and inox. The doors come with multipoint locks and adjustable cams.

The handles themselves are recessed into the frame sections, necessary given the slimline nature of the door profiles. You also get the option of upgraded Ultion door cylinders.

As you would expect from an aluminium door, the full RAL colour range is available with extensive colour choices and the option of different colours inside and out. As standard, the doors are available in Black RAL9005 and Grey RAL7016.

Technical Specifications.

  • U-Value down to 1.3 Wm2K
  • Windload up to 2000pa
  • Ten-year guarantee
  • 120kg weight per panel

How reliable are these new minimalist sliding doors to hit the market?

As the market awareness around these slimline sliding doors increases, one question homeowners may be asking is how tried and tested are these doors? It is true there will be manufacturers that have introduced sliding doors into their product range with no previous experience of making them.

Everglade Windows is the opposite, with over 35 years experience in manufacturing aluminium and already with a tried-and-tested range of sliding door systems and brands under its belt. The aïr 20SL comes to market with all the manufacturing and supply know-how that has placed Everglade Windows as one of the most prominent manufacturers, suppliers and installers in the UK today.

aïr 20sl sliding door in a large room
Any sliding door new or old is only as good as who makes it and who fits it.

Should you buy the Air 20SL sliding door?

The air 20SL minimal frame sliding door is refined, super slim, has top class engineering and looks fantastic. The manufacturing prestige of the company behind the product also gives peace of mind.

As with their other sliding doors, air 20 SL is built to last, offers flexible configurations and should enhance any home or new extension. In line with the rest of the air range, security is excellent, colour choice is extensive, and the air dealer network of top-class installers should give homeowners peace of mind too.

We know that reliability, performance and durability is what the air suite of sliding doors is all about. Unlike other manufacturers offering a similar product the air20SL also comes with one of the longest manufacturer warranties as well.

The obvious competitor to the air door is Origins’ Inline Slider. Origin’s door is being rolled out to a select group of Origin dealers. Origin’s approach makes perfect sense rather than a full scale-roll out given how different these structurally glazed doors are compared to conventional sliding doors.

Our initial research into the air vs origin sliding door reveals a few areas where the air 20SL has features the Origin sliding door does not.

  • air doors are available with dual colour option. The origin is not available with this option.
  • air is offering a fixed light option. We do not believe Origin will with theirs.
  • air doors are available with a sub-cill if needed.
  • air doors come with more handle styles on offer.

When the Origin sliding door is formally launched (as it is not yet on Origin’s website), we will review the two products side by side.

If you want to create a light-filled home with the latest generation, visually excellent sliding patio door, we recommend you take a look at the air 20SL. Contact us for more information.

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Andrew DOBSONAndrew DOBSON
16:42 30 Oct 23
Nick responded incredibly quickly to my enquiry (on a Saturday too!), and was able to offer invaluable advice on both aluminum systems and manufacturer / suppliers. Thanks Nick!
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19:55 13 Sep 23
Extremely helpful with pointing us in the right direction to find the products we required and suggesting firms that could reliably fit them.Nick was quick to reply and very detailed in his advice.Highly recommend reaching out to them.
Cathy GreenwoodCathy Greenwood
07:03 11 Sep 23
Update - A second email to nick for help on bifolds resulted in a detailed informative reply even on a Sunday ! This guy is so knowledgable and helpful .I approached Nick for an independent view on sliding doors v bifold and the different brand options . His reply was extremely detailed and prompt and allowed me to navigate this often confusing world in a much more informed way . Thanks so much Nick
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This is a must site for anyone looking for advice. Great service and very quick answers to questions. Nick has been of great help quiding us through the maze of aluminium products. Thank you
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20:24 26 Jul 23
I contacted Nick @ ATS for guidance on what aluminium sliding door systems would be suitable for an opening in an extension that is going to be both wide and tall. He came back really quickly with very detailed and incredibly helpful advice. He is clearly extremely knowledgeable about the systems on the market and their respective features and capabilities. If you’re feeling a bit lost by the overwhelming range of choices out there, I’d definitely recommend contacting him.
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Nick's advice is great. He is always quick to respond and spends time on responses, which really help to make an informed decision.
Alan FosterAlan Foster
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Fantastic website full of valuable and pragmatic advice about product selection and comparison: no other website gives information like this. Truly written for public interest. Don't hesistate to reach out to Nick via the mailing system. He responds very quickly, is friendly, and has very sound and high knowledgable advice. I have already shared this with my friend planning her own grand design.
guard Charlieguard Charlie
12:28 14 May 23
I emailed this company just on the off chance they could help me with new magnetic sliders for my patio door. They were not able to supply those but were so very helpful providing me with the name of a company who could. I am so very grateful at the great service. Dare say customers must be very happy. thank you so much.
Benjamin LewisBenjamin Lewis
10:06 04 May 23
Nick is very helpful indeed. Extremely knowledgeable on bifolds which was in relation to my query. Great website as well, some very useful articles. Particularly appreciated the article that lists all the major bifold options in order of their sightlines! Thank you!
P JonesP Jones
08:07 15 Apr 23
I asked Nick some questions about an installation we were considering and he replied within hours with some very useful suggestions that will probably lead us to using a different make and supplier. Thanks, Nick. Great work.
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After a lot of research to find doors that would meet our unusual size requirements and feeling increasingly uncertain about the best way to spend our small budget, I stumbled on the ATS website, and I'm so glad I did! I contacted ATS to request advice and Nick promptly replied with a wealth of information, providing us with options and relevant contact details. I only wish I'd found them sooner!
Carol NortonCarol Norton
10:01 17 Mar 23
I've been so confused about how to achieve the look I'm after, and going round in circles with various window/door companies, trying to get away from the huge chunks of plastic currently around my windows. I didn't expect an email to a company found through a Google search to really help - but I was desperate, so I tried. I'm SO glad I did. Finally I have clear explanations from ATS of where I've been going wrong, exactly what I'm looking for, and a list of local companies that might be able to provide it! The response has excelled my expectations and I feel as if I'm finally inching closer to a home with which I'll be happy and comfortable: thank you.
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It is rare that I write reviews, however after my very positive communication with Nick - enquiring about suitable slim sash aluminium windows for my project, I felt that a review was definitely warranted. I can reinforce the many positive reviews posted so far, Nick was very quick to respond, providing comprehensive detail, with excellent independent advice.In summary, great service, thank you Nick.
Chantal AuerbachChantal Auerbach
13:04 09 Mar 23
Nick from Aluminium Trade Supply was incredibly helpful informative and pleasant to deal with. He responded quickly to emails and was very knowledgeable. Highly recommend being in touch with Nick if you are considering new aluminium windows or doors.
Lee JonesLee Jones
20:21 22 Feb 23
I dropped Nick at Aluminium Trade Supply an email re high security slim sightline bi-folds and their alternatives and he responded that quickly (and so comprehensively) that I felt bad I’d not paid him for his time!Nick Sir your product knowledge is outstanding and you are providing a level of service that goes wayyyy above and beyond expectations. I’ll definitely make sure I mention Aluminium Trade Supply to anyone I encounter looking for a fenestration solution 🙏🏼
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15:13 13 Feb 23
We are looking to replace some old UPVC patios doors with aluminium ones. The ATS website is a great source of advice in an area where clear information is sorely lacking. Having used the website, I then followed this up with a number of specific questions relating to our search, and Nick came back very quickly with clear, detailed and very useful advice.I have been very impressed with both the website and with Nick's advice. My only regret is that I didn't come across ATS before replacing various windows in 2021 - I'm sure it would have saved me a lot of grief and money! Thanks again Nick.
Azza McCabeAzza McCabe
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So impressed with this company.Responded to my query quickly andgave valuable advice. Nick was extremely helpful and we were able to move forward with our project.
Adri LoloçiAdri Loloçi
11:21 08 Jan 23
Nick was super fast to respond and provided some great recommendations. I would recommend this website to anyone looking to find bifold or sliding aluminium doors.
Stephen HoustonStephen Houston
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Looking for aluminium crittall style internal door and external patio French doors. Noted good reviews and thought would ask for advice. Comprehensive reply with excellent independent advice and lists of fitters who could provide products and installation. Great service.
Inga GeachInga Geach
08:25 21 Dec 22
Nick from Aluminium Trade Supply has been extremely helpful with navigating the jungle that is aluminium glazing for our upcoming extension project. His advice was prompt, detailed and always impartial. Very grateful for your input, thanks Nick!
Amanda BurtonAmanda Burton
10:54 16 Dec 22
Brilliant website and an excellent service. Nick provided not only detailed advice and supplier contacts, but highlighted the considerations of various products so I could make an informed choice. Our Sunvista minimal sliders were fitted this week and I couldn't be happier, stunning. Thanks once again for your advice and recommendations, invaluable!
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Nick has been very helpful on signposting me to a number of partner organisations for steel/aluminium doors.
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