Our wooden window profiles come in four systems: the 68mm ECO 68 for renovations, the 92mm ECO 92 with triple glazing as our standard, the 92mm Quadruple with four glass layers achieving Uw 0.67, and a premium outward-opening option. All manufactured in engineered laminated timber at our factory in Latvia.
ECO 68 (68mm) - renovations, mild climates, budget projects. Double glazing.
ECO 92 (92mm) - new builds, Northern Europe. Triple glazing, Uw 0.78. Our recommended choice.
Quadruple 92 (92mm) - maximum insulation, Uw 0.67 (meeting Passivhaus Institut criteria). Four glass layers for the coldest climates.
Premium 115 (115mm) - outward-opening Scandinavian style. Deeper frame. Triple glazing, Uw 0.78. Quadruple glazing option down to Uw 0.6.
Our wooden window profiles fit every project - from heritage renovations to certified passive houses. Each profile system is designed for its purpose.
Click to enlarge. See more in our completed projects gallery.
Three quick questions and you will get a profile matched to your thermal targets, glazing and use case.
What type of project is this?
Where will the windows be installed?
What matters most for this project?
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| Parameter | ECO 68 | ECO 92 | Quadruple 92 | Premium 115 |
|---|---|---|---|---|
| Profile depth | 68 mm | 92 mm | 92 mm | 115 mm |
| Standard glazing | Double | Triple | Quadruple | Triple |
| Uw (W/m²K) | 1.0-1.3 | 0.78 | 0.67 | 0.78 |
| Passive house ready | No | Yes | Yes | Yes |
| Opening direction | Inward | Inward | Inward | Outward |
| Best for | Renovations | New builds, Northern EU | Max insulation | Scandinavian projects |
See detailed glazing data on our Glazing Options page.
| Parameter | Value |
|---|---|
| Whole Window U-value (Uw) | 0.78 W/m²K (ECO 92 profile) |
| Glass U-value (Ug) | 0.6 W/m²K |
| Glass Configuration | 4mm Low-E + 16mm Argon + 4mm Clear + 16mm Argon + 4mm Low-E |
| Glass Layers | 3 (triple insulated glass unit) |
| Profile System | ECO 92 (92mm depth) |
| Light Transmittance | 63% |
| Solar Factor (g-value) | 0.44 |
| Sound Reduction | 32 dB (Rw) |
| Gas Fill | 90% Argon |
| Glass Supplier | AGC (Planibel) |
| Standards | EN 410, EN 673, ISO 9050 |
| Timber | Engineered laminated: Pine, Oak, Meranti, or Larch |
| Paint System | Eco water-based micro-porous (RAL + NCS colours) |
| Hardware | GU (Gretsch-Unitas), Germany |
| Certifications | CE, ISO 9001, ISO 14001, EU A-Class, Secured by Design |
All four profile systems - ECO 68, ECO 92, Quadruple 92, and Premium 115 - are available across our product range.
14 opening configurations (C-1 to C-14). The most versatile window system in our range.
Outward opening with ASSA ABLOY hardware. Traditional Nordic design.
Timber interior with aluminium exterior cladding. Zero exterior maintenance.
Lift-and-slide mechanism on ECO 92 profile. PAS24 certified security.
EI-class fire protection with standard triple glazing performance.
Solid timber doors with multi-point locking and smart lock options.
Everything you need to specify our windows and doors. Click any section to expand.
Only engineered laminated timber. Kiln-dried, bonded in layers for strength, stability, and a knot-free finish.
PineStandard. Light, workable
OakPremium. Rich grain
MerantiTropical. Weather-resistant
LarchRot-resistant. StrongAll species available across all profile systems. See full wood types page for details.
From natural honey to dark chocolate. Any RAL or NCS colour available on request.
All frames finished with eco water-based micro-porous paint that allows timber to breathe while protecting against weather.
| Colour Systems | RAL + NCS (any colour from either system) |
| Finish Options | Lacquer both sides / Lacquer + RAL / RAL both sides / Different RAL inside and outside |
| Silicone | Remmers (Germany), 16+ colours: Transparent, White, Brown, Black, Manhattan, Oregon |
| Gasket | 5 colours: White, Grey, Beige, Brown, Black |
| Drip Edges | Frame and sash: White, Aluminium, Brown, Bronze |
Optional aluminium exterior cladding in any RAL colour for zero-maintenance facades.
Two hardware systems from established European manufacturers, selected by window type.
Used on Tilt and Turn, Sliding Doors, Entrance Doors
| Handle Models | DIRIGENT (standard), ADAGIO, MODENA, SAN REMO, SOPRANO |
| Handle Colours | Silver, Champagne, Gold, White, Bronze, Brown |
Silver
Gold
White
Bronze
Brown
With Key| Door Locks | GU SECURY Automatic, 3-point lock (AS4540) |
Used on Scandinavian Windows (outward opening)
Espagnolette + lever handles in traditional Scandinavian style.
Child Safety: key-operated window restrictors available on all inward-opening windows.
Four styles of decorative bars to match any architectural period. Available on all glazing levels. Full visual guide on our Glazing Options page.
Constructional
Duplex
External
Internal
Trimvent TV 90 product
Technical dimensions (mm)
Background ventilation without opening the window. Maintains air quality while preserving thermal and acoustic performance.
| T-bar | Deflects air upward and downward for draft-free ventilation |
| Material | Aluminium ventilator, fully gasketed for performance |
| External | Canopy or flat grill to match facade |
| Control | Manual or cord-operated. Patented design. |
Automatic chain actuator for smart home integration. Fits into frame profile, operated by remote or building automation.
Multiple security certifications for UK and European markets. Full documents on our Certifications page.
| PAS 24:2016 | UK enhanced security. Certified for windows (ALLSWING 110-240), ECO 92 doors, sliding doors. |
| EN 1627 | European burglary resistance. Tested on windows and sliding doors. |
| RC2 / RC3 | Resistance Class 2 (Legno Classic) and Class 3 (Legno Comfort). |
| Secured by Design | UK Police Preferred Specification. Recognised by insurance providers. |
| Child Safety | Key-operated restrictors for all inward-opening windows. |
Fire resistance (EI-30, EI-45 and EI-60 certified by TUV EESTI) covered on Fire-Resistant Windows page.
All official documents for specifiers, installers, and building owners. Download, print, or share.
For all independent test reports and certificates, see our Certifications page.
ECO 68 (68mm) fits double glazing at Uw 1.0-1.3. ECO 92 (92mm) fits triple glazing at Uw 0.78, a 40-50% improvement. ECO 92 is standard for Northern Europe. ECO 68 is cost-effective for renovations and mild climates.
ECO 92 with triple glazing achieves Uw 0.78, meeting the passive house threshold (Uw ≤ 0.80). For projects requiring even lower values, our premium profile with quadruple glazing can reach Uw 0.67. Contact us for premium specifications.
ECO 92 is used across our tilt and turn windows, alu-clad windows, sliding doors, fire-resistant windows, and quadruple glazed windows. ECO 68 (68mm) is the budget option for tilt and turn. Scandinavian (outward-opening) windows are built exclusively on our dedicated Premium 115 profile.
ECO 92 (92mm) is our standard tilt and turn system with triple glazing at Uw 0.78. Quadruple 92 uses the same 92mm frame with four glass layers, achieving Uw 0.67 - ideal for passive house projects. Premium 115 is our dedicated outward-opening Scandinavian system (115mm frame), with triple glazing at Uw 0.78 or quadruple glazing down to Uw 0.6 (the best in our range). See our thermal performance page for full U-value details.
With proper maintenance (repainting every 8-12 years), engineered timber windows last 50-60 years. This is 20-30 years longer than PVC alternatives. The engineered laminated timber construction prevents warping and cracking, and the micro-porous paint system allows the wood to breathe while protecting against weathering.
We manufacture at our factory in Kalnciems, Latvia and deliver across the EU. Current export markets include the UK, Norway, Sweden, Denmark, Netherlands, Germany, Switzerland, France, Canada, and New Zealand. Installation services are available or we supply to your local installer. Contact us for delivery to your region.
Fill in your project details and we will prepare a tailored proposal within 48 hours.
Thank you! Kristiana will review your request and respond within 48 hours.
Four glass layers on 92mm profile. Uw 0.67 for certified passive house projects.
All glass configurations, U-value calculator, specialist glass types.
All timber windows and doors. Tilt and turn, Scandinavian, alu-clad, sliding, fire-rated.
