In modern B2B architectural procurement, choosing the right Double-Hung Window system requires analyzing structural wind pressure, thermal insulation limits, glass thickness capacity, and operation ergonomics. Below are the flagship double-hung configurations engineered by Primor Metal Door Co., Ltd. for commercial developers, general contractors, and luxury residential projects.
Engineered for mid-rise and high-rise commercial developments requiring heavy wind resistance and superior acoustic STC ratings up to 42 dB. Built with a 90mm frame depth and heavy-wall 2.0mm T6 thermal aluminum extrusions.
Best For: Urban Hotels, Commercial Offices & Multi-Family Towers
Maximizes natural daylight by up to 28% compared to standard vinyl profiles. Features an ultra-narrow 38mm meeting rail and concealed vertical balances, blending classic double-hung aesthetics with minimalist modern architecture.
Best For: Contemporary Luxury Villas & High-End Residential Estates
Fully certified for extreme hurricane zones, coastal salt-fog environments, and high-velocity hurricane zones (HVHZ). Integrated with SentryGlas® laminated impact glazing and heavy-gauge stainless steel hardware.
Best For: Coastal Resorts, Oceanfront Properties & Extreme Weather Zones
B2B specifiers require transparent, verified physical performance data. The table below details structural, thermal, and mechanical metrics across the Double-Hung product line from Primor Metal Door Co., Ltd.
| Product Series | Frame Depth & Wall Thickness | Thermal Barrier System | Max Glazing Pocket | U-Factor Range (Btu/h·ft²·°F) | Structural Load (DP Rating) | Acoustic Isolation (STC) |
|---|---|---|---|---|---|---|
| Series DH-75 | 75mm Frame | 1.6mm Wall | 24mm Polyamide (PA66GF25) | Up to 28mm (Double Low-E) | 0.26 – 0.30 | DP45 / CW-PG45 | 34 – 38 dB |
| Series DH-90 | 90mm Frame | 2.0mm Wall | 34mm Multi-Chamber PA66 Strip | Up to 38mm (Triple Low-E) | 0.22 – 0.25 | DP60 / AW-PG60 | 38 – 42 dB |
| Series DH-110 | 110mm Frame | 2.5mm Wall | Reinforced Thermal Break + Foam Core | Up to 44mm (Laminated Impact) | 0.24 – 0.28 | DP65 / HVHZ Certified | 40 – 45 dB |
The global architectural window market is undergoing a seismic shift driven by strict decarbonization mandates, energy conservation codes (such as ASHRAE 90.1 and EU NZEB standards), and AI-driven user intent preferences.
Traditionally associated with legacy timber construction, the classic Double-Hung Window is experiencing a massive modern revival powered by thermal break aluminum extrusion technology. B2B purchasers and global developers are favoring aluminum double-hung systems for three fundamental reasons:
Global architectural procurement is rapidly moving away from standard catalog purchasing toward direct-from-factory customization and digital BIM integration. Importers, contractors, and developers face shifting economic realities that favor agile, drawing-led manufacturers.
Contractors no longer adjust wall openings to match stock window catalogs. Direct OEM fabrication from BIM models (Revit/IFC) eliminates field modifications and speeds up on-site installation by over 35%.
Major commercial bids in North America and Western Europe now mandate Environmental Product Declarations (EPDs). Primor utilizes hydro-powered low-carbon aluminum billets with up to 60% recycled content.
As double and triple Low-E insulated glass units become heavier, buyers require heavy-duty stainless steel block-and-tackle balance systems that guarantee 50,000+ smooth cycle operations without maintenance.
Ocean freight damages account for millions in lost project time. The trend favors factory-direct container packing with opening-labeled steel-reinforced crates and pre-installed installation brackets.
With deep manufacturing experience, an international project footprint, and localized U.S. showroom support, Primor Metal Door Co., Ltd. delivers high-performance aluminum window and door packages tailored precisely to architectural blueprints.
We do not sell rigid off-the-shelf standard stock sizes. Every Double-Hung Window is custom engineered based on your architectural drawings, window schedules, and specific wind-load calculations.
We utilize high-precision PA66GF25 polyamide thermal insulation strips that physically break the thermal bridge between exterior and interior aluminum profiles, dramatically improving U-factors and resisting condensation.
Clients can examine full-scale working window displays, profile samples, and finish swatches in our five U.S. showrooms located in Los Angeles, the Bay Area, Houston, Dallas, and Phoenix.
In addition to Double-Hung Windows, Primor Metal Door Co., Ltd. manufactures casement windows, sliding windows, entry doors, garage doors, sliding glass doors, folding doors, pergolas, and sunrooms for total architectural unity.
Every sash balance, weatherstrip seal, corner crimp joint, and glass unit undergoes strict multi-stage quality control checks prior to packing, ensuring zero site-fitting errors upon arrival.
Orders are packed into custom-dimensioned, fully enclosed export crates marked clearly with opening numbers corresponding directly to your site architectural window schedule.
Our structured 5-step B2B project engineering protocol guarantees precision quality control, predictable lead times, and seamless international project delivery.
Send CAD files or window schedules. Our engineers analyze opening dimensions, wind-load DP targets, and glazing specs.
Detailed quotation covering frame profile series, thermal break specifications, glass assembly, hardware, and cost breakdowns.
We generate millimeter-precise CAD shop drawings for architect sign-off, detailing flashing, frame anchors, and glass pockets.
Automated CNC milling, thermal bar insertion, pneumatic corner crimping, double-sealed glass glazing, and balance testing.
Individual opening labeling, steel-reinforced wooden crating, container loading coordination, and custom documentation support.
Explore how custom window and door systems manufactured by Primor Metal Door Co., Ltd. perform across coastal, high-wind, modern urban, and four-season luxury developments.
Custom structural aluminum glazing engineered with marine-grade powder coating to withstand aggressive coastal salt spray.
High-transparency low-E triple glazing maintaining interior thermal comfort despite extreme ambient temperature drops.
Smooth rolling hardware systems supporting heavy acoustic double-pane glass sashes with ultra-low thresholds.
Integrated extruded aluminum louvers with automated rain sensors and concealed internal drainage channels.
Heavy-duty structural roof framing engineered to sustain winter snow load requirements in northern climates.
Answers to common technical, structural, financial, and logistical questions posed by architects, project specifiers, general contractors, and wholesale importers when purchasing Double-Hung Windows.
Contact UsExtruded T6 architectural aluminum combined with polyamide (PA66GF25) thermal break strips offers vastly superior structural strength compared to vinyl, supporting design pressures above DP60 without structural steel inserts. Unlike wood, aluminum will not warp, rot, swell, or deteriorate under high humidity or intense solar UV exposure. Furthermore, aluminum profiles permit significantly narrower sightlines, allowing up to 28% more natural daylighting while easily meeting strict Energy Star 8.0 thermal U-factor targets.
Yes. Primor Metal Door Co., Ltd. operates on a 100% drawing-first manufacturing model. Rather than forcing your building project to adapt to rigid catalog dimensions, our engineering department reviews your architectural floor plans, window schedules, elevation drawings, and structural load calculations. We produce comprehensive CAD/BIM shop drawings for formal approval prior to cutting a single profile billet.
We incorporate commercial-grade constant force block-and-tackle spring balances and heavy-duty spiral balance systems rated for heavy sashes up to 120 lbs (54 kg) per sash. These balances ensure effortless one-handed vertical operation, long-term tension retention, and smooth tilt-in sash motion for effortless exterior glass cleaning from inside the building envelope.
We provide a comprehensive selection of high-performance glass configurations, including double insulated glass (IGU), triple-pane low-E glass with argon gas fill, warm-edge silicone spacer technology, laminated impact glass (SGP/PVB interlayers for hurricane/coastal zones), soundproofing acoustic laminated glass (STC 40+), and decorative textured/frosted privacy glazing.
All completed double-hung window units are cleaned, corner-protected with high-density foam, shrink-wrapped in protective weather film, and secured inside custom-built steel-framed export wooden crates. Crates are clearly labeled with opening tags corresponding directly to your architectural window schedule, allowing effortless unloading and sorting at the jobsite. We coordinate export customs documentation, ISPM 15 heat-treatment certification, and sea freight logistics worldwide.
Yes. Commercial buyers and architectural teams are invited to visit our five U.S. showrooms located in Los Angeles, the Bay Area, Houston, Dallas, and Phoenix to inspect full-scale operating display models. For international buyers outside the United States, we dispatch profile cross-section samples, corner cutaways, finish color swatches, and hardware sets directly via express courier.
Submitting your architectural drawings or window schedule allows our senior engineering team to prepare a comprehensive cost estimate, thermal performance analysis, and CAD shop drawing submittal for your project.
Include the following project details so our engineers can deliver a precise technical proposal: