Zyle Fenster
Zyle Aluclad Passivhaus Window
A high-performance timber window with external aluminium cladding, developed for Passivhaus and very-low-energy building envelopes.
What this system is designed to do
A high-performance timber window with external aluminium cladding, developed for Passivhaus and very-low-energy building envelopes.
Where we would specify it
It is intended for certified Passivhaus, EnerPHit and low-energy projects where airtight junction design and verified frame performance are central.
Features and performance
- Meets Passivhaus thermal thresholds
- Engineered timber core
- Durable aluminium external cladding
- Triple glazing as standard
- Warm-edge spacer technology
- Project-specific internal and external finishes
Technical specifications
Colours and finishes
Colours and finishes
Any RAL colour, outside and in.
Powder-coated aluminium protects the outside, and the engineered timber inside is finished in paint or stain. White, RAL 9016, is standard, and any RAL Classic colour can be specified.
Outside
- Material
- Aluminium cladding
- Finish
- Polyester powder coat
- Colour
- White (RAL 9016) as standard, or any RAL Classic colour
Inside
- Timber
- Engineered redwood
- Finish
- Three-coat factory spray: water-based microporous paint or stain
- Colour
- White (RAL 9016) as standard, any RAL Classic colour, or a stain from the TRC range
Standard colours 29
White, RAL 9016, is standard. Select colours to add them to your project enquiry.
RAL 1035 Pearl beige and RAL 9007 Grey aluminium are effect finishes, made for a powder-coated aluminium face rather than painted timber.
Any RAL Classic colour
On the aluminium, the timber or both.
Also available
- Wood stains The timber inside can be stained rather than painted, from the TRC stain range.
- Glazing beads Internally beaded. Supplied in white, grey or black.
- Spacer bars White warm edge spacers as standard; silver or black optional.
Your selection
Colours on screen are a guide only, and pearl and metallic finishes cannot be shown. Add your choices to your project enquiry and we will go through them with you.
Add to project enquirySource: Zyle Fenster’s specification and FAQs for this system. Standard colour range and glazing bead colours: Zyle Fenster, September 2026.
FAQs
Common questions, answered.
The essentials on the Zyle Aluclad Passivhaus Window: what it is, how it performs, the options, and where it fits best.
Still have a question?
Our team can talk you through the detail for your project.
What is Zyle Aluclad Passivhaus Window?
A high-performance timber window with external aluminium cladding, developed for Passivhaus and very-low-energy building envelopes.
How does Zyle Aluclad Passivhaus Window perform?
The published whole-window Uw value is 0.79 W/m²K with standard triple glazing, warm-edge spacing and dual Low-E coatings, meeting the thermal performance thresholds the Passivhaus Institute sets for certification.
Which design and specification options are available?
The system uses a 48 mm triple-glazed unit and can be coordinated with project-specific timber finishes and external powder-coated colours.
When would Eco Home Windows specify this system?
It is intended for certified Passivhaus, EnerPHit and low-energy projects where airtight junction design and verified frame performance are central.
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