Explore our premium export-ready product series, engineered to meet stringent NFRC, Florida NOA, and Energy Star thermal & structural performance standards.
Grandex Door Solutions Co., Ltd. stands at the forefront of high-precision architectural fenestration engineering, integrating state-of-the-art Industry 4.0 automation with rigorous testing protocols to serve global commercial and residential sectors.
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 deep industry expertise and 8 years of dedicated export experience, the company generates an annual export revenue of USD 28 million. Grounded in robust OEM and ODM trade capabilities, our product portfolios primarily serve high-demand markets across North America and Western Europe, supported by a vast supply chain ecosystem spanning over 1,200 verified logistics and raw material partners.
We cater directly to leading building material distributors, real estate developers, and commercial general contractors worldwide. Quality is integral to our operations: supported by strict ISO 9001 certified internal testing protocols and third-party laboratory verification, our 45-member Quality Assurance (QA) team ensures uncompromising quality control throughout every step of production. Driven by an active R&D division with 85 specialized engineers, we introduced 120 new door designs last year alone, offering full custom solutions spanning custom dimensions, high-security smart locking systems, electro-static surface finishes, and advanced decorative insulated glass units.
The modern entryway is no longer merely a point of egress; it is an engineered barrier system balancing thermal envelope preservation, structural integrity against extreme weather events, and seamless smart access integration.
With global green building codes enforcing aggressive Energy Star and Net-Zero Energy Building (ZEB) thresholds, entry doors must incorporate advanced polyamide thermal breaks (PA66GF25) and poly-foam insulated cores to eliminate thermal bridging and slash U-factors below 0.22 BTU/h·ft²·°F.
Commercial and luxury residential developments demand factory-integrated electronic access controls, including concealed motorized multi-point locks, biometric facial recognition scanners, dynamic RFID Readers, and home automation API interfaces embedded seamlessly within aluminum frame profiles.
Increasing severe weather events have elevated demand for severe weather and coastal hurricane impact entry doors certified under Florida NOA (Notice of Acceptance) standards, featuring heavy-gauge extruded aluminum 6063-T6 framing and laminated low-E safety glass.
Institutional buyers, real estate developers, and commercial contractors evaluate OEM door manufacturing partners through quantitative performance parameters and compliance verification.
| Performance Metrics | Technical Benchmark Standards | Grandex Engineering Solutions | Target Localized Market Compliance |
|---|---|---|---|
| Thermal Transmittance (U-Factor) | ≤ 0.25 BTU/h·ft²·°F (EN ISO 10077-1) | Polyamide PA66GF25 Thermal Break + Low-E Argon Fill (U-Factor down to 0.18) | USA Energy Star, EU Passive House, Canada NRCan |
| Wind Pressure Resistance | Design Pressure (DP) 50 to 100+ PST | Heavy-duty 6063-T6 Extruded Aluminum Alloy Frame Reinforcement | Florida High-Velocity Hurricane Zone (HVHZ), Coastal Regions |
| Acoustic Insulation (STC/OITC) | STC ≥ 38 dB, OITC ≥ 32 dB | Multi-layered laminated glazing with acoustic PVB interlayers & dual EPDM seals | Urban Hospitality, Luxury High-Rise Multi-Family Units |
| Air & Water Infiltration | Air: < 0.1 cfm/ft²; Water: 15 PSF (730 Pa) | Concealed drainage channels, dual perimeter weather-stripping & drop-down sill seals | NFRC / AAMA / WDMA / CSA 101/I.S.2/A440 Certifications |
| Anti-Burglary / Security Rating | RC2 / RC3 (EN 1627) / PAS 24 | Multi-point hook locking gear, anti-drill cylinder plates, heavy-duty 3D adjustable hinges | Western European Commercial & Residential Security Mandates |
Our 35,000 m² smart factory integrates digital twin modeling, automated CNC center machining, and dynamic material sorting lines to eliminate dimensional deviations, reduce lead times by 35%, and deliver seamless scalability for massive OEM enterprise orders.
Our facility is backed by a 45-member Quality Control engineering squad operating modern CNC automated machinery and multi-stage testing rigs ensuring structural zero-defect assurance.
In-house pressure chamber simulating structural hurricane forces up to 120 PST, water penetration cycling, and air infiltration metrics before dispatching products to international test labs.
Our specialized engineering team focuses on structural thermal breaking, concealed hardware mechanisms, acoustic dampening PVB technology, and smart digital lock integration.
Our custom entry doors and fenestration solutions are deployed globally across diverse climate zones and architectural typologies.
Deployment: USA Hotels (Home2 Suites, Holiday Inn, Augusta Outposts)
Engineering Focus: Incorporates specialized Low-E insulated glass units equipped with continuous capillary tubes to equalize internal gas pressures in high-elevation projects, preventing glass deflection or seals blowing out.
Deployment: Florida Coastal Villas, Caribbean Resorts
Engineering Focus: Heavy-gauge reinforced aluminum profiles engineered with SentryGlas® impact interlayers to withstand severe wind pressure debris impacts and marine-grade corrosion-resistant powder coatings.
Deployment: Supermarket Main Entrances, Urban Shopping Malls
Engineering Focus: Custom electric anti-pinch automatic glass entry systems fitted with heavy-duty commercial threshold seals, infrared motion activation, and emergency panic-breakout hardware.
Comprehensive answers regarding custom manufacturing capabilities, certifications, lead times, and global shipping options.
Explore additional specialized door and window configurations available for OEM customization and export distribution.
Grandex Door