The Alitherm Heritage steel replacement window system has been specifically designed as an ultra slim, thermally efficient and secure aluminium replacement for traditional steel windows.
It is particularly suitable for openings with through stone work or where slim stone mullions and transoms require the fame work to be as narrow as possible. The Alitherm Heritage window system is also the perfect solution for timber sub frame applications and is available with a choice of outer frame profiles to accommodate different timber rebates.
With an authentic stepped aluminium profile and classic hardware options our Alitherm Heritage aluminium window system is the perfect choice to sympathetically replicate the style and timeless appearance of old steel windows from a bygone era.
|Original Steel Windows||New Steel Windows||Alitherm Heritage
|*new steel is typically 3 to 4 times more expensive than Alitherm Heritage aluminium|
A combination of the latest inline polyamide thermal break, krypton gas filled sealed units ensures that our Alitherm Heritage aluminium window range meets the highest standards of thermal performance.
A dedicated external door system with matching frame profiles and exclusive hardware is also available to compliment this window range.
We had first class service from Marlin Windows. They are professional and efficient. We are delighted with our windows and would highly recommend them.
Inspired by the aesthetics of traditional steel windows, Alitherm Heritage features signature slim sightlines and attractive contours making it the ideal choice for heritage building conservation areas where building regulations demand a like-for-like replacement.
Alitherm Heritage slim systems have already been approved as replacement windows for listed buildings by many councils.
All main profiles feature polyamide thermal break technology that enhances the thermal performance of the product, allowing Alitherm Heritage windows to achieve a window energy rating ‘A’ grade when fabricated with the correct specification and glazed unit. Profiles have a high quality powder coated paint finish at Smart’s state of the art paint facility in a choice of finishes, including single or dual colour, in a range of standard and non-standard colours.
Windows: fixed windows, side hung & top hung open out casement
Doors: single or double open out balcony doors
Steel replacement heritage doors
NEW - Steel style heritage bifolding doors.
Our aluminium profiles are polyester powder coated by our systems suppliers using the very latest paint application techniques guaranteed for 25 years.
SGG Planitherm sealed glass units complete our leading combination of products and finishes.
Marlin Windows were reassuringly professional, calm & helpful from first contact which made the decision to use them so right. The pre-sales team were full of advice - not in the least bit pushy contrary to stereotype - & the advice was spot-on because they'd done it all before.
The product looks amazing too... I suppose the windows might be much the same elsewhere & maybe even of similar price or cheaper, but the customer support, reliability, professionalism & interest at Marlin is second to none.
I honestly think it's a rarity these days to come across a company with values like Marlin so 5*s well-deserved.
|File Type||Document Description||Download Document|
|Alitherm Heritage Brochure
|Download (11.3 MB)|
|Download (2.2 MB)|
Section identification Guide
|Download (32 MB)|
Product Data Sheet IMS123AH.201410
|Download (508 KB)|
Supply only – Guide to installation
"We ordered Aluminium Steel replacement 'crittal' type French Patio doors and Windows. They are absolutely beautiful. And they were an absolute pleasure to deal with. Thanks Marlin!"
Read our guide to listed building window replacement
Read our guide to conservation area property window replacement