High-Performance Thermal Break Aluminum Casement Windows Engineed for Central European Energy Regulations (ČSN EN 10077 / Nová zelená úsporám). Custom Direct-from-Factory B2B Solutions for Developers, Architects, and Importers.
Request Czech Project Quote & Technical Spec SheetEngineered with multi-chamber thermal breaks and multi-point locking systems meeting European Standard EN 14351-1.
Technical whitepaper perspective on thermal efficiency, regulatory standard compliance, and procurement economics in Central Europe.
The Czech Republic’s construction landscape is undergoing a massive shift driven by the European Union’s Energy Performance of Buildings Directive (EPBD) and national subsidy frameworks like Nová zelená úsporám. Modern residential and commercial developments in Prague, Brno, and Plzeň demand overall window thermal transmittance values (Uw ≤ 0.85 to 1.1 W/m²K).
Standard legacy profiles fail to meet these stringent thresholds. Our custom aluminum casement windows utilize multi-cavity Technoform PA66 polyamide thermal barriers combined with triple Low-E argon-gas filled glass units, guaranteeing full compliance with Czech national building code CSN 73 0540-2.
Central Europe experiences severe temperature differentials, ranging from harsh sub-zero winter freeze (-15°C) to mid-summer heatwaves (+35°C), alongside heavy wind loads in sub-alpine regions like Krkonoše and Šumava. Fenestration systems must resist thermal expansion, water ingress, and structural deflection.
We utilize high-tensile 6063-T6 architectural grade aluminum extrusions with a wall thickness of 1.6mm to 2.2mm. Combined with continuous EPDM triple gaskets, our casement systems deliver exceptional airtightness (Class 4 EN 12207) and watertightness (Class 9A EN 12208).
High focus on urban residential retrofits, historical facade harmonizations, and acoustic attenuation. High sound reduction index requirements (Rw ≥ 42 dB) for transit-adjacent developments.
Modern tech hubs and commercial office parks requiring ultra-slim frame profiles, maximum daylight harvesting (VT ≥ 75%), and seamlessly integrated motorized ventilation systems.
Industrial facilities, commercial administrative centers, and logistics hubs prioritizing structural durability, burglar resistance (RC2 / RC3 EN 1627 standard), and zero maintenance overhead.
Combining precision German machine tools with agile Chinese manufacturing scale for optimized procurement cost and uncompromised quality.
Founded in 2015, Tianjin Kross Window & Door Technology Co., Ltd. operates an advanced production facility spanning 35,000 square meters. Backed by 11 years of deep industry expertise and 8 years of global trade experience, the company generates an annual export revenue of $31 million. Our key export markets encompass North America, Western Europe, and Australia, serving commercial property developers, facade contractors, and door & window distributors.
Quality control is managed by a team of 42 QC technicians executing rigorous water tightness testing, structural load checks, and air infiltration measurements. Supported by a robust network of 850 supply chain partners, Kross excels in custom solutions including thermal break profiles, triple-glazed acoustic glass, and custom anodized finishes. Driven by an R&D department of 58 engineers, we successfully introduced 65 new window designs over the past year.
Comprehensive engineering matrix of OUNA Casement Window Series tailored for distribution and project specification in Czechia.
| Specification Parameter | OUNA Standard Series | OUNA Thermal Break Triple-Glazed | Czech Regulatory Target (ČSN) |
|---|---|---|---|
| Thermal Transmittance (Uw) | 1.4 – 1.6 W/m²K | 0.80 – 1.1 W/m²K | ≤ 1.2 W/m²K (Standard), ≤ 0.85 (Passive) |
| Acoustic Rating (Rw) | 32 – 36 dB | Up to 45 dB (Laminated Glass) | 35 – 42 dB (Urban Center Zones) |
| Air Permeability (EN 12207) | Class 3 | Class 4 (Highest European Grade) | Class 3 / Class 4 |
| Watertightness (EN 12208) | 7A (300 Pa) | E900 / Class 9A (900 Pa) | Class 7A+ |
| Wind Load Resistance (EN 12210) | Class C3 | Class C5 / B5 (2500 Pa) | Class C3+ |
| Hardware Integration | Kross Standard Hardware | Siegenia / Roto Frank German Systems | EN 13126 Standard Compliant |
Explore our full range of certified casement, tilt-and-turn, and awning windows equipped with thermal break tech, insect screens, and hurricane impact rating options.
Direct answers to technical, logistics, compliance, and custom manufacturing queries for Czech developers and wholesalers.
Yes. All Kross window systems exported to the European Union carry the CE mark and are manufactured in compliance with EN 14351-1. We supply complete Declaration of Performance (DoP) documents including tested U-values, wind load, and watertightness ratings for seamless building code approval across Czechia.
Absolutely. While traditional side-hung casements are available, over 80% of our shipments to European buyers feature dual-function Tilt-and-Turn (OS - Otvíravě Sklopné) hardware powered by high-end German gear systems like Siegenia Aubi or Roto Frank for micro-ventilation and easy cleaning.
Our standard manufacturing cycle is 25 to 30 days depending on custom RAL powder coating or anodizing specifications. Ocean transit from Tianjin port to Hamburg (Germany) or Koper (Slovenia) takes approximately 30 to 35 days, followed by 2-3 days direct truck transport to job sites in Prague, Brno, or Pilsen.
Yes. Our triple-glazed thermal break series achieves Uw values as low as 0.8 W/m²K, which comfortably satisfies the strict thermal insulation criteria set by the Czech State Environmental Fund for building energy modernization grants.
We provide over 200 standard RAL colors with Qualicoat Class 2 powder coating, as well as metallic anodized finishes, fluorocarbon (PVDF) coatings for coastal high-UV areas, and natural wood-grain heat-transfer foils that align with traditional Czech regional architectural aesthetics.
Every window unit is wrapped in protective scratch-proof film, corner-guarded with heavy-duty EPE foam, and encased inside fully sealed IPPC ISPM-15 compliant fumigated wooden crates. Containers are loaded using automated air-cushion strapping to prevent movement during sea transport.
Get direct factory engineering support, BIM files, product samples, and competitive B2B wholesale pricing tailored for Czech construction standards.
Kross Window