Is this the most thermally efficient aluminium bifold?

Over the past 5 years bifold doors have seemingly gone slightly out of fashion as the large panes of glass and minimal frames of sliding doors have become the norm for larger and larger apertures…but bifold doors could be set to make somewhat of a comeback thanks to changes in Building Regulations.

With Part O potentially limiting the amount of glass and Part L meaning more and more triple glazing is required, bifold doors have become a popular option, particularly on projects with openings under 5m wide. With bifolds the challenge for architects has been finding the balance between performance, thermal efficiency and aesthetic appeal when it comes to glazed doors, but the SUNFLEX SF75ECO aluminium bifold door system from IDSystems does just that.

Advanced thermal performance
With a patented 44mm multi-chamber thermal break, the SF75eco is specifically designed to accommodate a triple glazed unit. The result of this advanced engineering is that no aluminium bifold door system on the market can achieve lower U-values that the 0.8W/m²K that the SF75ECO is capable of – making the doors suitable even for Passivhaus standard builds.
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Superior weather protection
Whilst thermal performance is a theoretical calculation of a door systems capability, weather protection is measured by a physical tests for wind load, air permeability and water tightness in a laboratory – and as you would expect the SF75eco is unrivalled in its performance, thanks to its exclusive triple-rebated gasket design and advanced weathered track option.
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Slender aluminium frames
The challenge for architects has been incorporating glazed doors that don’t just perform well, they also actually look good in the finished design as well and the SF75eco achieves that. With slender 117mm sightlines and panels up to 1.2m wide and 3.6m high the doors maximise the glass area when closed and provide a seamless connection between inside and out when open.
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Exclusive design features
The SF75ecohas been designed in Germany by SUNFLEX GmbH, utilising more than 35 years of folding door design. The system includes a number of innovative design features including the patented panel catch and stacking clip technology that prevent the doors from being blown shut in the wind and finger-safe gasket design that keeps little fingers safe as the doors are closed.
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More about IDSystems products

Sliding Doors
An innovative of sliding doors that includes theEDGE2.0, an ultra-slim system with incredibly slim 20mm intermediate sightlines.

Bifold Doors
Award-winning SUNFLEX bifold doors that are made in Germany and packed full of unique features not found on any other folding door.

Slide & Turn Doors
IDSystems exclusive vistaline slide & turn doors combine narrow frames with the ability to create completely unobstructed openings.

Aluminium Windows
A hugely versatile range of aluminium windows with contemporary square edge frames that includes the ultra-narrow IDS300 Slim.

Heritage Doors
Art-Deco inspired doors with sleek frames, ideal for traditional style properties or for adding character to more contemporary designs.

Internal Glass Doors
Glass partitions that are perfect for dividing open-plan living spaces or can be used to enclose patios or balconies to extend living spaces.

CPD Material

IDSystems’ RIBA approved CPD material has proven hugely popular with practices of all sizes, and we can host the sessions either remotely online or face-to-face in your studio.

NBS Source

IDSystems’ most popular products aluminium sliding, bifold and slide and turn doors are now available to be added to specifications using NBS Source, with full technical details available.