Top 10 Window in China | Wholesale windows for houses

Aluminum window procurement from China requires precise technical data. This article provides specifications, pricing, certifications, and installation data for windows for houses, windows and doors systems, house windows, and double glazed windows manufactured in China. All data is based on production standards from Foshan Guangdong factories serving export markets.

Windows for Houses — Residential Sizes and Pricing

Standard residential window sizes exported from China follow modular dimensions. Common widths range from 600mm to 2400mm; heights from 600mm to 2100mm. The following table shows pricing by window type and size for FOB China terms.

Opening Type and Ventilation Area

Casement windows achieve 90-degree opening with maximum ventilation area equal to 100% of the sash opening. Sliding windows provide 50% ventilation area. Tilt-and-turn windows offer dual opening modes: tilt 15 degrees for secure ventilation, or turn 90 degrees for full opening. These configurations are standard for windows for houses exported from China.

Frame Wall Thickness and Section Data

Primary frame profiles use 6063-T5 aluminum alloy with 1.4mm minimum wall thickness for outer frames, 1.6mm for sash frames, and 2.0mm for mullions and transoms. The frame depth ranges from 50mm to 70mm depending on the series. Thermal break profiles use PA66 GF25 polyamide strips with a width of 14.8mm or 18.6mm.

Windows and Doors — Integrated System Specifications

Combined windows and doors systems require compatible frame profiles and hardware. Standard aluminum systems use the same 6063-T5 alloy and thermal break technology across window and door products to ensure color matching and thermal performance consistency.

Frame Profile Matching and Material Compatibility

When ordering windows and doors together, specify the same aluminum series (e.g., 50mm, 60mm, or 70mm frame depth) to ensure consistent sight lines and hardware compatibility. The standard powder coating uses AkzoNobel or Interpon powder with a coating thickness of 60-80 microns and a hardness of 2H pencil hardness.

Thermal Bridge Break Performance

Thermal break profiles with 14.8mm PA66 GF25 strips achieve a frame U-value of 2.2-2.8 W/m²K. With 18.6mm strips and polyurethane foam filling, the frame U-value drops to 1.8-2.2 W/m²K. These values meet the requirements for Passivhaus and low-energy buildings in European and North American markets.

House Windows — Technical Performance Metrics

Performance testing for house windows from China follows EN 12207, EN 12208, and EN 12210 standards. The following data is from third-party testing reports conducted by certified laboratories in China.

Air Tightness and Water Resistance

Air permeability testing results: Class 4 (EN 12207) with air leakage rate of 0.3 m³/h·m at 100 Pa pressure difference. Water tightness achieves Class 8A (EN 12208) with a water pressure of 600 Pa. These ratings apply to standard house windows with EPDM rubber gaskets and dual-seal construction.

Wind Load and Structural Ratings

Wind resistance testing according to EN 12210 achieves Class C5 (1200 Pa deflection) and B5 (1800 Pa structural). For hurricane-prone regions, Miami-Dade NOA-rated windows achieve 2000 Pa structural load and 1200 Pa water penetration resistance. These ratings are required for Florida and Caribbean markets.

Double Glazed Windows — Glass and Insulation Data

Double glazed windows use insulated glass units (IGU) with aluminum or warm-edge spacer bars. Standard glass configuration is 5mm clear tempered glass + 12mm air gap + 5mm clear tempered glass. Optional upgrades include Low-E coating, argon gas fill, and warm-edge spacer bars.

Glass Configuration and Thermal Performance

The following table compares double glazed windows configurations by U-value and solar heat gain coefficient (SHGC).

Spacer Bar and Gas Fill Options

Standard aluminum spacer bars are 6mm or 8mm width. Warm-edge spacer bars (Swisspacer or TGI-Spacer) reduce the linear thermal transmittance (psi value) from 0.08 W/mK to 0.04 W/mK. Argon gas fill (90% minimum concentration) reduces the U-value by 0.2-0.3 W/m²K compared to air-filled units. Krypton gas is available for triple-glazed units with a 6mm gap, reducing U-value to 0.9-1.1 W/m²K.

Aluminum Alloy and Surface Treatment

Aluminum window frames use 6063-T5 extruded alloy with a tensile strength of 160 MPa and yield strength of 110 MPa. The chemical composition is controlled: Si 0.38-0.43%, Mg 0.45-0.50%, Fe max 0.15%, Cu max 0.05%. This alloy provides the best combination of extrudability, corrosion resistance, and mechanical strength for window applications.

Powder Coating and Anodizing Specifications

Powder coating uses electrostatic spray application with a curing temperature of 180-200°C for 15 minutes. Coating thickness: 60-80 microns. Color range: RAL catalog and custom colors. Gloss level: 30-40% (matte) or 60-80% (gloss). Anodizing is available in 10-20 micron thickness for natural silver, champagne, or bronze finishes. Both treatments pass 1000-hour salt spray testing (ASTM B117) without blistering or corrosion.

Hardware and Locking Systems

Standard hardware uses Roto, Hoppe, or Winkhaus multi-point locking systems. Casement windows feature 4-6 locking points with a compression force of 80-120N. Handles are zinc alloy with a 30,000-cycle durability test. Hinges are stainless steel 304 with a load capacity of 80-120kg per hinge pair. These components are standard for window exports from China.

Certifications and Testing Standards

Window products from China carry multiple certifications required for global markets. The following certifications are standard for export orders.

CE Marking and European Standards

CE marking is mandatory for EU market entry. Testing covers EN 14351-1 (windows and doors), EN 12207 (air permeability), EN 12208 (water tightness), and EN 12210 (wind resistance). Fire resistance testing to EN 1364-1 is available for 30-minute and 60-minute ratings. CE certification is issued by notified bodies such as TÜV, SGS, or Intertek.

AAMA, NFRC, and Miami-Dade NOA

For North American markets, AAMA certification includes AAMA 101 (voluntary specifications), AAMA 2604 (coating performance), and AAMA 2605 (high-performance coating). NFRC certification provides U-factor, SHGC, and visible transmittance ratings. Miami-Dade NOA (Notice of Acceptance) is required for hurricane zones in Florida. Testing includes TAS 201 (impact), TAS 202 (cyclic pressure), and TAS 203 (water infiltration). Impact-resistant windows use laminated glass with 1.52mm PVB interlayer meeting ASTM E1886 and ASTM E1996.

Pricing and Procurement Terms

FOB China pricing for aluminum window orders is based on quantity, configuration, and destination market. The following pricing applies to standard 5+12A+5 double glazed casement windows with powder-coated finish.

MOQ, Payment, and Packaging

Minimum order quantity (MOQ) is 50m² per window type or 10 units per size. Payment terms: 30% T/T deposit, 70% balance before shipment. For orders over $50,000, L/C at sight is accepted. Packaging: each window is wrapped in PE film and foam corner protectors, then packed in wooden crates with fumigation treatment. Each crate holds 8-12 units depending on size. Shipping marks include handling instructions, destination, and product codes.

Installation Guidelines and Site Requirements

Proper installation is critical for achieving the rated performance of aluminum windows. Installation should follow the manufacturer’s guidelines and local building codes.

Opening Preparation and Tolerance

Window openings must be square and level within 3mm per meter. The opening width and height should be 10-15mm larger than the frame outer dimensions to allow for adjustment and foam sealing. Structural opening tolerance: ±5mm in width and height, ±3mm in diagonal. For windows for houses, ensure the opening reveals are clean and free of mortar protrusions before frame installation.

Waterproofing and Sealing

Install the frame with stainless steel or plastic packers to achieve level and plumb. Secure the frame with expansion bolts at 500-600mm centers, minimum 150mm from corners. Fill the gap between frame and structure with polyurethane foam (density 15-20 kg/m³). Apply neutral silicone sealant (Shore A 20-25) to the exterior joint with a 8-10mm bead width. Install a waterproof membrane or drip cap above the window head. Ensure the sill has a 5-degree outward slope for drainage.

Project Reference — Residential Window Installation

A residential project in California, USA, used aluminum casement windows from China for a 320m² single-family home. The window configuration included 24 casement windows, 6 sliding windows, and 4 fixed picture windows, totaling 86m² of glazing area.

Project Data and Configuration

Window specification: 60mm series thermal break aluminum, 1.6mm wall thickness, 5+12A+5 Low-E double glazed, Roto hardware, powder-coated dark gray (RAL 7016). Total window area: 86m². Project location: San Diego, California. Climate zone: CEC Title 24 Climate Zone 7. Building code: 2022 California Energy Code. Window U-factor requirement: 0.35 Btu/hr·ft²·°F (equivalent to 1.99 W/m²K). Installed window U-factor: 1.8 W/m²K (0.32 Btu/hr·ft²·°F), meeting code with 10% margin.

Cost Comparison and Performance Results

Total project cost for windows: $12,800 FOB China, including crates and fumigation. Shipping (40ft container) to Long Beach: $2,400. Local delivery and installation: $4,200. Total installed cost: $19,400. Cost per m² installed: $225. Compared to a local US manufacturer quote of $38,000, the imported solution saved $18,600 (49% reduction). Energy savings: estimated $340/year in heating/cooling costs due to the Low-E double glazing. The project received full Title 24 compliance and HERS verification with no corrections required.

For windows and doors procurement, technical specifications, and export terms from China, contact the manufacturer for detailed quotes and lead times.