Proven Engineering
At Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI), technical integrity and regulatory compliance are integral to our manufacturing discipline. We design, engineer, and manufacture architectural entry doors and pivot systems that strictly comply with international building codes and European harmonised standards.
Backed by more than 25 years of engineering expertise and an 180,000 m² state-of-the-art production base, DERCHI holds over 100 invention and utility patents, including our proprietary Four-Side Six-Point locking mechanism. Every door system undergoes thorough quality checks under ISO 9001 certified protocols to satisfy European tenders, building control authorities, and private clients.
Fully compliant with EU Construction Products Regulation (CPR) for external pedestrian doorsets.
Traceable factory-controlled processes ensuring batch-to-batch structural and coating consistency.
Proprietary multi-point anti-burglary locks, multi-seal weather barriers, and thermal barrier designs.
International Recognition
From the Atlantic coast to Central Europe, North America, and Australasia, DERCHI door systems hold the required regulatory documentation to clear site inspections smoothly.
Mandatory for external pedestrian doors in the EU. Demonstrates compliance with mechanical resistance, thermal transmittance (EN ISO 10077), watertightness (EN 12208), air permeability (EN 12207), and wind resistance (EN 12210).
Certified quality management across design, precision CNC machining, structural assembly, surface powder coating, and factory pre-shipment functional testing for zero-defect project delivery.
Exclusive DERCHI patent offering multi-directional perimeter interlocking. Engineered to deliver exceptional forced-entry resistance corresponding to European RC2 and RC3 burglar protection guidelines.
Achieved N6 rating—the top classification under Australian standards—confirming structural wind loading, air-water tightness, and safety glazing performance under extreme coastal climate conditions.
Verified U-Factor, Solar Heat Gain Coefficient (SHGC), and air leakage metrics meeting demanding North American energy conservation guidelines and hurricane impact specifications.
Specialised fire-rated pivot and hinged doors designed to maintain compartment integrity, insulation, and smoke protection for multi-residential and commercial lobby requirements.
Technical Verification
European contractors and architects can review the core testing standards applied across our aluminium, cast aluminium, and stainless steel door assemblies.
| Performance Field | Harmonised Code | Test Focus & Parameters | DERCHI Certification Status |
|---|---|---|---|
| CE Pedestrian Doorsets | EN 14351-1 | EU Declaration of Performance (DoP), mechanical load, CE label audit | Certified & Documented |
| Thermal Insulation (UD) | EN ISO 10077-1 / -2 | Thermal break barrier design, multi-chamber profiles, warm-edge spacers | Calculated Per Project |
| Burglar & Intrusion Defense | EN 1627 - EN 1630 | Static/dynamic pressure tests, manual forced-entry with mechanical tools | Up to RC3 Equivalent |
| Air Permeability | EN 12207 | Differential air pressure resistance across door perimeter seals | Class 4 Compliant |
| Watertightness Under Pressure | EN 12208 | Continuous water spray resistance against specified test storm pressures | High Exposure Rated |
| Resistance to Wind Loads | EN 12210 | Structural frame deflection limits and safety test pressure resistance | Class C5 / AS2047 N6 |
| Acoustic Decibel Reduction | EN ISO 717-1 | Sound reduction index (Rw) with laminated safety glass and acoustic cores | Verified Test Reports |