Explore our engineered portfolio of precision-manufactured aluminum, vinyl, and glass systems certified for extreme hurricane durability, high thermal efficiency, and luxury architectural integration.
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.
OEM/ODM Technical Leadership: Grandex operates end-to-end parametric modeling, FEA structural simulation, and multi-axis CNC fabrication lines to translate complex architectural drawings into structural building envelope solutions that exceed NFRC, Florida NOA, and CE specifications.
The global market for luxury glass entrance doors is undergoing a seismic shift driven by architectural trends favoring maximal natural light, minimal visual obstruction, and ultra-high energy efficiency. Modern commercial headquarters, high-end residential estates, and luxury multi-family developments demand entrance doors that serve as key focal points while delivering unmatched structural integrity against severe weather and security threats.
Developers in coastal regions across North America, the Caribbean, and East Asia prioritize high Design Pressure (DP) ratings and hurricane impact certification. Doors must withstand wind loads exceeding 150 mph and high-velocity missile impacts (HVHZ) without structural envelope compromise.
Global energy codes—such as California Title 24, Energy Star 7.0, and EU EPBD directives—mandate strict U-factor limits ($U \le 0.22 \text{ BTU/h}\cdot\text{ft}^2\cdot^\circ\text{F}$). Thermally broken aluminum extrusions and double/triple-pane Low-E insulated glass units (IGUs) are now baseline requirements for luxury procurements.
Modern luxury entrances require seamless integration with building automation systems (BAS). OEM configurations must accommodate concealed motorized driving mechanisms, biometrics, RFID access, electronic drop seals, and panic escape hardware for high-footfall commercial zones.
Grandex Door Solutions integrates cutting-edge material science with architectural structural design to manufacture next-generation luxury glass entrance doors. Our technical roadmap highlights ongoing developments across thermal break design, smart glazing, and structural alloy extrusions.
| Performance Metrics | Grandex Standard Specification | Grandex Luxury Commercial / High-Rise Spec | Testing Standards & Certifications |
|---|---|---|---|
| Thermal Transmittance (U-Factor) | 0.24 - 0.28 BTU/h·ft²·°F | 0.14 - 0.18 BTU/h·ft²·°F (Vacuum Triple Glazed) | NFRC 100 / ISO 10077-1 |
| Design Pressure (DP / Structural Load) | DP 55 (up to 140 mph wind load) | DP 90 - DP 110 (High-Velocity Hurricane Zones) | AAMA/WDMA/CSA 101/I.S.2/A440-11, TAS 201/202/203 |
| Acoustic Isolation (STC / OITC) | STC 35 / OITC 29 | STC 45+ / OITC 38 (PVB Laminated Acoustic Glass) | ASTM E90 / ASTM E1425 |
| Air Infiltration Resistance | < 0.10 cfm/ft² @ 1.57 psf | < 0.01 cfm/ft² @ 6.24 psf (Airtight Compression Seal) | ASTM E283 |
| Water Penetration Resistance | 8.0 psf (370 Pa) | 15.0 psf (720 Pa) Static & Dynamic Water Pressure | ASTM E331 / ASTM E547 |
| Security & Ballistic Rating | EN 1627 RC3 / Multi-point hook lock | EN 1627 RC4 / UL 752 Level 3 Bullet Resistant Glass | ASTM F588 / PAS 24 / UL 752 |
Our profile designs utilize high-grade Polyamide PA66 reinforced with 25% glass fiber (PA66GF25). This structural thermal barrier reduces thermal conductivity across the aluminum frame by over 90%, preventing interior condensation, decreasing solar heat gain, and optimizing indoor climate control.
For executive boardrooms, luxury residential entrances, and smart commercial spaces, Grandex supplies dynamic electrochromic glass. With the touch of a button or via automated sensor triggers, glass panels instantly transition from crystal-clear transparency to opaque privacy while filtering 99% of harmful UV rays.
Grandex's state-of-the-art facility integrates automated 5-axis CNC machining, intelligent material sorting lines, digital glass tempering furnaces, and dual-component structural silicone sealant robots. Every stage of manufacturing adheres strictly to ISO 9001 certified protocols to ensure zero-defect output.
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Sawing
Milling
CNC Milling
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CNC Center
Cutting
Intelligent Sorting
Checking and Packing
Sawing Machine
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CNC Milling Machine
CNC Drilling Machine
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Double Head Cutting Saw
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Semi-finished products inspection
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Navigating global building regulations requires deep expertise in regional compliance frameworks. Grandex Door Solutions ensures that every door and window system dispatched from our factory conforms to local architectural standards across key export markets.
Full compliance with Florida NOA (Notice of Acceptance), Miami-Dade DBPR codes, NFRC thermal rating, California Title 24, Energy Star, and AAMA/WDMA/CSA 101/I.S.2/A440 standards. Perfect for coastal impact zones and strict energy code states.
CE and UKCA marked entrance door systems compliant with EN 14351-1, passive house thermal transmission standards ($U_w \le 0.8 \text{ W/m}^2\text{K}$), soundproofing EN ISO 717-1, and burglar resistance class RC2/RC3/RC4 under EN 1627.
Certified strictly in accordance with AS2047 (Windows and doors in buildings) and AS1288 (Glass in buildings selection and installation), featuring high structural deflection resistance and cyclone region ratings.
Our dedicated 45-member QA/QC division conducts rigorous multi-stage inspections at every single step of manufacturing:
Grandex partners directly with real estate developers, architectural firms, and high-volume distributors to deliver tailored entrance solutions. Supported by 85 R&D engineers, we take your custom architectural vision from initial sketch to fully certified, mass-produced product lines.
Review of site-specific wind loads, U-factor targets, acoustic demands, opening clearance, and hardware integration needs.
Generation of detailed 2D/3D shop drawings, Revit BIM objects, structural load FEA simulation, and custom die design.
Precision CNC sampling within 10 days, followed by third-party laboratory air/water/wind pressure verification.
Automated mass production in our 35,000 m² factory with protective sea-worthy packaging and scheduled site delivery.
Technical insight into custom engineering, minimum order quantities, lead times, structural testing, and international shipping protocols.
Explore additional custom-engineered thermal break sliding stacker doors, ultra-slim exterior glass systems, and fire escape commercial assemblies.
Grandex Door