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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.
Read our Buyers Guide To Steel Window Alternatives
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 Edwardian, Georgian and period bygone eras.
| Original Steel Windows | New Steel Windows | Alitherm Heritage Aluminium Windows |
|
|---|---|---|---|
| Lowest cost | ✘ high |
✘ very high* |
✔ |
| Double Glazed | ✘ | ✔ | ✔ |
| Thermally efficient | ✘ | ✔ | ✔ optimum |
| Slim frame | ✔ | ✔ | ✔ |
| Original Appearance | ✔ | ✔ | ✔ |
| Traditional fittings | ✔ | ✔ | ✔ |
| Factory painted | ✘ | ✔ | ✔ |
| Textured finish | ✘ | ✔ | ✔ |
| Dual colour | ✘ | ✔ | ✔ |
| Rust proof | ✘ | ✔ | ✔ |
| 100% recycled | ✔ | ✔ | ✔ |
| *new steel is typically 3 to 4 times more expensive than Alitherm Heritage aluminium Read our Buyers Guide To Steel Alternatives | |||
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.
Design Applications
Windows: fixed windows, side hung & top hung open out casement
Doors: single or double open out balcony doors
Features
Our aluminium profiles are polyester powder coated by our systems suppliers using the very latest paint application techniques guaranteed for 25 years.
Fully compliant to the latest June 2022 building regulations our standard double glazing is the exceptional light transmitting, energy saving ClimaGuard® A+ low emissivity (Low-E) glass manufactured by Guardian Glass.
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.
Our high quality window and door products are backed by the same high quality customer service. Technical advisors are just a phone call away to answer all your questions no matter how technical.
Typical help provided includes:
We provide a FREE sample service to assist with surveying decisions, design considerations, or planning applications – just pick up the phone and ask.
Click To Call
Super customer service, they actually answer the phone and call back promptly if they’re not available... very helpful throughout with technical advice.
| File Type | Document Description | Download Document |
|---|---|---|
 |
Alitherm Heritage Brochure Brochure |
Download (11.3 MB) |
|
Alitherm Products Brochure |
Download (5.6 MB) |
|
Alitherm Heritage Section identification Guide |
Download (33.5 MB) |
|
Alitherm Heritage Product Data Sheet IMS123AH.201410 |
Download (508 KB) |
|
Alitherm Heritage Supply only – Guide to installation |
Download (403kb) |
| Product Type | Windows and Doors |
|---|---|
| Material | Aluminium Polyamide |
| Dual Colour | ✔ |
| Thermally broken | ✔ |
| Max width | 900 |
|---|---|
| max height | 2100 |
| Max weight | 60 |
| Thermal suitability | ★★★★★ |
| Min Glazing | 24 |
| Max glazing | 32 |
| Multi-point | ✔ |
|---|
| light duty | ✔ |
|---|
"We ordered Steel Replacement French Patio doors and Windows. They are absolutely beautiful. And they were an absolute pleasure to deal with. Thanks Marlin!"
Read our guide to conservation area property window replacement
Read our buyers guide to the best Alternatives To Steel Windows and Doors
And we are rated ★★★★★ on Google
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or
"our builder said they were the best supplier and fitter they had ever used"
Transform your home and enjoy the benefits today. Set your budget and spread the cost.
Improve your home now with our payment options
Marlin Windows Limited would like to offer you an interest free loan on our Heritage steel replacement windows for up to 12 months.
We partner with Mitsubishi HC Capital (UK) PLC trading as Novuna, a leading financial services company with over 30 years’ experience of providing finance solutions.
The provider of choice for more than one million customers across the UK.
Credit is available to UK residents aged 18 and over and is subject to affordability, application, status and lending criteria.
You must have an email account as interest free loans apply to online credit applications only.
A deposit is required on all orders.
We also offer credit at Representative 7.9% APR variable, over terms up to 60 months.
Typical Example: Price of goods £10,000
Amount of loan : £5000
Deposit : £5000
60 monthly payments of £101.51 at an APR of 7.9%
Subject to affordability, application, status and lending criteria. A deposit is required on all orders. Terms and conditions apply.
Marlin Windows Limited is a credit broker, not a lender.
Authorised and regulated by the Financial Conduct Authority for consumer credit and non-investment insurance activities.
