China Energy Saving Low-E Aluminum Double Hung Window Manufacturer Wholesale Price List

The Aluminum Double Hung Window has long been a staple of classic and colonial architecture, valued for its timeless aesthetic and functional versatility. In the modern B2B construction market, this traditional design has been re-engineered with high-performance materials to meet 21st-century energy standards. As a premier manufacturer in China, we specialize in supplying heavy-duty, thermal-break double hung systems that offer superior ventilation, ease of maintenance, and architectural elegance for residential developments and historical restoration projects.

1. Technical Engineering and Material Specifications

Unlike traditional timber or vinyl versions, our Aluminum Double Hung Window is designed for maximum structural longevity and minimal frame expansion. We utilize primary 6063-T5 or T6 aluminum alloys, providing the rigid foundation required for large-scale vertical sliding units.

• Profile Wall Thickness: Our frames feature a wall thickness of 1.4mm to 2.0mm, ensuring that the window remains square and operates smoothly even under high wind loads.
• Thermal Break Technology: To prevent energy loss, we integrate PA66-GF25 polyamide thermal strips. This creates a thermal barrier that significantly reduces the U-value, making these windows suitable for both cold northern climates and tropical regions.
• Balancing Mechanism: We use high-grade constant-force spring balances or block-and-tackle systems. These components are tested for 20,000+ cycles to ensure the sashes remain easy to lift and stay in position without drifting.
• Glazing Systems: Standard configurations include double-tempered Low-E glass (5mm+12A+5mm) with Argon gas filling. This setup effectively blocks UV radiation and reduces interior heat gain by up to 35%.

2. The Advantage of Sourcing from a China Manufacturer

Procuring Aluminum Double Hung Windows directly from a specialized China-based factory provides significant logistical and financial benefits for B2B wholesalers, contractors, and developers. China’s advanced aluminum extrusion infrastructure allows for rapid customization and high-volume production that is difficult to match in other regions.

By choosing a factory-direct partnership, you benefit from: - **Architectural Customization:** Tailored frame colors (RAL colors), custom grille patterns (muntins), and specialized hardware finishes. - **Stringent Quality Control:** Our facility adheres to ISO 9001 standards, with every window undergoing rigorous air/water infiltration testing before container loading. - **Global Logistics Support:** We handle the complex documentation required for international shipping, including Certificate of Origin and compliance testing reports.

3. Selection Criteria: Single-Hung vs. Double-Hung Systems

For B2B projects, choosing between single-hung and double-hung configurations often depends on budget and maintenance requirements. 1. Single-Hung Windows: Only the bottom sash is operable. This is a cost-effective solution for ground-floor installations where external cleaning is easy. 2. Double-Hung Windows: Both top and bottom sashes slide vertically. This allows for superior air circulation (cool air in through the bottom, warm air out through the top) and enables easy cleaning of both sashes from the interior.

Our engineers recommend double-hung systems for multi-story residential projects to simplify long-term maintenance and maximize tenant comfort.

4. 2026 Wholesale Factory Price List (FOB China)

As a professional manufacturer, we maintain transparent pricing to help our partners plan their project budgets accurately. Below is an estimated price list for 2026 bulk procurement (FOB Port):

*Note: Prices are based on minimum order quantities (MOQ) of one 20ft container. Custom hardware (e.g., SUS316 locks) and specialized colors may incur additional costs.

5. Case Study: Heritage Restoration Project, Charleston, USA

In 2024, our factory supplied 180 custom-sized Aluminum Double Hung Windows for a luxury residential restoration project in Charleston. The architect required a traditional "6-over-6" grille pattern but demanded modern thermal performance. We developed a custom profile with internal grilles and high-performance Low-E glazing. The project successfully passed the local historical society's aesthetic review while achieving a 30% improvement in building energy efficiency compared to the original single-pane timber windows.

6. Professional Installation and Structural Requirements

To maintain the warranty and ensure optimal performance, vertical sliding windows must be installed with precision. - **Level and Plumb:** The window frame must be perfectly level and plumb to prevent binding of the sashes or failure of the balance system. - **Flashings and Pans:** Proper sill pan installation is critical for moisture management, especially in wood-framed constructions. - **Fastener Spacing:** Use high-strength fasteners spaced every 300mm to 450mm to ensure the frame remains rigid under thermal cycling.

7. ROI and Property Valuation Analysis

Investing in high-end aluminum double hung windows offers a dual return on investment. First, the reduction in heating and cooling costs provides an immediate operational saving. Second, the durability of aluminum means the windows will not warp, rot, or require repainting for 20+ years, significantly reducing long-term CAPEX for property managers. From a resale perspective, high-quality architectural fenestration is one of the highest-value upgrades a developer can make to a residential project.

8. Global Compliance and Certification Standards

Our products are engineered to meet the highest international benchmarks, ensuring a smooth inspection process for your local projects: - **AAMA/NFRC (North America):** Certified for structural integrity, air infiltration, and thermal performance. - **AS2047 (Australia/NZ):** Rigorous testing for ultimate wind pressure and water penetration. - **CE Marking (European Union):** Compliance with safety, health, and environmental protection standards.

We provide full digital testing reports and physical warranty certificates with every export batch, guaranteeing peace of mind for our global B2B partners.

As a dedicated Aluminum Double Hung Window manufacturer, we invite architects, developers, and international wholesalers to visit our China-based facility. Contact our technical team today for a custom project quotation and engineering consultation.