TWINDOW
The Window Revolution Starts Here
Exclusively available through ECOWINDOWS in New Zealand, TWINDOW isn’t just a window – it’s a complete rethink of how windows should work. Engineered in Europe with future-focused technology, it blends German precision, sustainable materials, and modular flexibility.
Think of it as a high-performance jacket for your home: tough on the outside, cosy on the inside — and when the outer layer wears out, you just zip on a new one. No demolition. No drama.
Circular by Design
At the heart of TWINDOW lies a world-first modular two-shell construction:
- A weather-resistant outer shell that protects, shields, and can be swapped out in minutes.
- A solid timber inner core that stays pristine and untouched for decades.
This clever separation gives you something the building industry hasn’t seen before: a window system that’s repairable, upgradeable, and incredibly long-lived – perfect for regenerative building and low-impact architecture.
Built for Generations
Replaceable Outer Shell
Renew, upgrade or restyle without touching the structural window.
Inner Core of Champions
Engineered timber shielded from the elements. Designed to last over 60 years.
Timber Craftsmanship
Solid, repairable, and beautiful. Choose from pine, spruce, larch, or oak.
Mix It Up
Go full timber, or combine timber with aluminium for next-level durability and design contrast.
Patented and brilliant, the SlideClick® system makes TWINDOW an absolute breeze to maintain.
- Outer shells slide off tool-free – in seconds
- Replace glass from the outside, even when the window is installed
- No mess, no demolition, no headaches
Tradies love it. Architects love it. Homeowners love it.
Designed for Real Building Sites
TWINDOW plays nicely with complex builds.
- No need to disturb plaster, insulation, or cladding when replacing shells
- Integrates seamlessly with Passive House detailing, airtight wraps, and shading systems
- Comes Passive House-ready and High-Performance-home certified
Even the sills and sun shades snap into place without a fuss.
Forget fixed colour combos. TWINDOW gives you a 4-colour configuration so you can design every layer, inside and out, the way you want.
- Mix and match materials – aluminium outside, timber inside, or full timber for a natural feel.
- Select your interior profiles – sleek and modern or classic and bold
- Go beadless for a clean, seamless look. with uninterrupted glass views.
- Choose from premium surface finishes, including eco-oils, matte lacquers, or uncoated timber that silvers naturally over time.
Earth Care, Built In
TWINDOW is your climate-positive companion:
- Maximal Sustainability – built to last, easy to recycle, minimal impact
- Recycling-friendly design – disassemble and recycle by material type at end-of-life
- CO₂-smashing materials – aluminium with 75% post-consumer content, glass with 46% reduced emissions
- No nasties – no chemical wood preservatives, only natural finishes and breathable materials
Certified good for your home and the planet.
Performance that Speaks for Itself
Class 4 (Highest)
E900 (wood) / E1200 (wood-aluminium)
Up to CE2500
0.77 W/(m²K)
Excellent – suited for high-performance projects
RC2 (optional)
Outer shell replaceable, core >60 years lifespan
TWINDOW also comes as a high-performance lift-and-slide door system (HST 2.0) with:
- Full modular outer shell
- Barrier-free threshold
- Passive House–friendly sealing
- Optional SoftOpen and SoftClose technology
