Explore our NFRC, AAMA, and AS2047 certified entry doors and thermal break window combinations engineered for structural resilience and energy efficiency.
Setting global standards in premium entry door manufacturing through vertical integration, rigorous QA testing, and continuous thermal technology engineering.
Corporate Overview: Established in 2014, Grandex Door Solutions Co., Ltd. is a premier entry door manufacturer operating from a modern 35,000 m² facility. With 16 years of industry expertise and 8 years of dedicated export experience, the company generates an annual export revenue of USD 28 million. Grounded in strong OEM and ODM trade backgrounds, our products primarily serve North America and Western Europe, supported by a network of over 1,200 supply chain partners. We cater to leading building material distributors, real estate developers, and commercial contractors. Quality is integral to our operations: supported by strict ISO 9001 certified internal testing and third-party laboratory verification, our 45-member QA team ensures rigorous quality control throughout production. Driven by an active R&D division with 85 specialized engineers, we introduced 120 new door designs last year and offer full custom solutions spanning custom dimensions, security locks, surface finishes, and decorative glass panels.
Inside our 35,000 m² smart manufacturing plant. We deploy automated CNC machining, intelligent material sorting, and rigorous multi-stage performance testing to achieve micrometer precision.
Pioneering smart security integration, ultra-low U-value thermal breaks, and sustainable structural composite systems for 2025 and beyond.
Next-generation entrance doors are evolving beyond passive physical barriers. Grandex R&D leads the transition toward fully embedded IoT ecosystems, utilizing 3D facial recognition, encrypted RFID keyless entry, and concealed motorized multi-point locking mechanisms compatible with Control4, Crestron, and Apple HomeKit.
To exceed stringent Passive House standards (U-value < 0.8 W/m²K), our engineering team utilizes high-density PA66 GF25 thermal break strips combined with aerogel-infused insulating cores. This completely eliminates thermal bridging between interior and exterior aluminum surfaces, drastically cutting HVAC energy losses.
With extreme weather events increasing globally, our exterior main doors incorporate heavy-gauge 6063-T6 aluminum alloys and SGP (SentryGlas® Plus) laminated impact glass. Engineered to withstand DP70 structural pressures and large-missile impact testing in accordance with ASTM E1886/E1996 and Florida Building Codes.
Tailored structural fenestration assemblies for high-end luxury residential, commercial high-rise, and severe-weather coastal environments.
Custom oversized pivot doors and grand bi-fold main doors reaching heights up to 4.5 meters. Features concealed hydraulic floor pivots, German-engineered multi-point locks (GU / KFV), and custom wood-grain powder coating options for unmatched aesthetic sophistication.
Heavy-duty automated sliding and entry systems designed for ultra-high traffic frequency. Built with reinforced corner cleats, panic exit devices (ANSI Grade 1), fire-rated core insulations (up to 90 minutes), and low-threshold ADA-compliant aluminum sills.
Corrosion-resistant main door assemblies featuring Qualicoat Class 2 fluorocarbon (PVDF) surface treatments. Withstands over 3,000 hours of continuous salt spray testing (ASTM B117), protecting structural integrity against harsh marine atmospheres.
Direct technical mapping ensuring seamless municipal building code approval across North America, Western Europe, and Australia.
| Target Region | Certification Standard | Thermal Transmittance (U-Value) | Air / Water / Structural Limits | Primary Application |
|---|---|---|---|---|
| North America | NFRC / AAMA / CSA | 0.21 - 0.32 BTU/h·ft²·°F | ASTM E283 / E331 / E330 (DP50-DP70) | Custom Residential & Commercial Entryways |
| Western Europe | CE / EN 14351-1 / Passive House | 0.8 - 1.2 W/m²K | Class 4 Air / E900 Water / Class C5 Wind | Energy-Saving Eco Villas & Apartments |
| Australia / NZ | AS2047 / AS1288 / AGWA | 1.4 - 2.0 W/m²K | 450 Pa Water Penetration / 3000 Pa Ultimate | Luxury Coastal & Urban Developments |
| Global Coastal | ASTM E1886 / E1996 (Impact) | Custom Low-E Double Glazed | Large Missile Level D (50 fps Impact) | Resort Facilities & Hurricane-Prone Structures |
From preliminary CAD/BIM modeling to door-to-door (DDP) logistics and jobsite installation support, Grandex mitigates international procurement risk.
Our 85-member engineering team provides fully customizable Revit BIM models and 2D/3D shop drawings. We perform structural load analysis, wind-load calculations, and thermal modeling (LBNL THERM) prior to production to guarantee 100% architectural alignment with site rough openings.
Grandex manages complete ocean freight, customs clearance, and local site delivery (DDP terms available). All exported main door systems are protected by a comprehensive 10-year warranty on aluminum profiles and glass units, backed by responsive technical support across North America and Europe.
Detailed answers to technical, commercial, and logistical queries regarding main door manufacturing and export from China.
Grandex combines 16 years of industry experience with a modern 35,000 m² smart manufacturing hub equipped with automated 5-axis CNC machines and digital double-head cutting saws. Sourcing directly from an established China OEM/ODM factory yields a 30% to 45% cost efficiency advantage while maintaining compliance with North American (NFRC/AAMA) and European (CE/Passive House) quality standards.
Our main doors are engineered using heavy-duty 6063-T6 aluminum extrusion profiles reinforced with internal steel or titanium-alloy corner cleats. For hurricane-prone zones, we incorporate SentryGlas® Plus (SGP) laminated safety glass and multi-point lock hardware, achieving structural test ratings up to DP70 and passing ASTM E1886/E1996 impact standards.
We employ advanced Polyamide (PA66 GF25) thermal breaks that structurally separate the interior and exterior aluminum frame sections. Combined with Low-E double or triple tempered glass filled with 90% Argon gas, our thermal break main doors achieve total system U-values as low as 0.8 to 1.2 W/m²K, minimizing thermal bridging and interior condensation.
Standard custom production requires 25 to 35 days following shop drawing sign-off. For large commercial projects involving custom extrusion dies or unique anodized/PVDF powder finishes, lead times range between 35 and 45 days. Rapid prototyping for OEM design verification can be completed within 14 days by our 85-engineer R&D team.
Yes, our R&D team offers custom pre-drilling and cable channel routings for smart lock integration. We partner with top lock manufacturers (GU, Siegenia, Yale, Dormakaba) to supply concealed motorized multi-point locks, biometric fingerprint scanners, keypad entry, and video intercoms connected via Wi-Fi, Zigbee, or Z-Wave protocols.
Quality assurance follows strict ISO 9001 protocols starting at raw material intake (spectrometric aluminum alloy validation). Our QA staff conducts inline dimensional checks at CNC milling and drilling stations, semi-finished inspection after powder coating, and final operational performance testing on our automated air/water pressure simulation rigs before protective wood-crate packing.
For extreme coastal exposure, we recommend Qualicoat Class 2 or Class 3 fluorocarbon (PVDF) coatings or 25-micron hard-anodized finishes. These surface treatments resist UV degradation, chalking, and salt spray corrosion, retaining color stability and structural integrity for over 20 years in harsh marine conditions.
Every main door panel and frame is wrapped in protective shrink film, edge-protected with high-density EPE foam corner guards, and enclosed within fully sealed fumigation-free plywood crates. Heavy assemblies are anchored to wooden pallets to prevent shifting during ocean transit.
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