The 48 x 36 double casement window is a DERCHI custom thermal-break aluminum product built on the S9 Starlight System platform. Measuring 48 x 36 in (1219 x 914mm) with two opposing outward-opening sashes of approximately 610mm each, it delivers balanced left-right ventilation and a symmetrical facade for modern residential and commercial builds. This is a made-to-order window, not a stock standard item.
- Two operable sashes sharing glass weight for structural balance and independent ventilation control
- S9 series: 109mm frame, 1.8mm wall thickness, 44/24/15mm multi-insulation strip configuration
- Standard 5+27A+5 fluorocarbon insulated aluminum spacer tempered glass with custom glass upgrades available
- Verified Class 6–9 performance across water, air, sound, thermal, and wind pressure ratings
Product Details
The S9 Starlight System forms the structural foundation of this custom 48 x 36 double casement window. Its 109mm thermal-break aluminum frame carries 1.8mm multi-cavity walls paired with a 44/24/15mm multi-insulation strip configuration — including a 44mm extra-wide strip that reduces heat transfer across the profile. A three-seal structure, micro-elastic glass block, and frame-sash same-horizontal-line design work together to manage glass corner stress and weather tightness. Standard glazing is 5+27A+5 fluorocarbon insulated aluminum spacer tempered glass, with the glass sash opening outward and the screen sash opening inward.
The double sash layout splits the 1219 x 914mm opening into two opposing sashes of roughly 610mm each, so each sash carries less glass weight while providing independent left-right ventilation. Buyers needing coastal safety features can consider the R8Y series (118mm frame, anti-fall rope, WEHAG hardware), while the E0 series (100mm frame, 35/30/12mm strip) serves budget-sensitive batch projects. All three series share the same verified Class 6–9 performance ratings. Detailed frame profile cross-section drawings are available on request.
Product Features
- Balanced Double-Sash Ventilation: Two opposing operable sashes at approximately 610mm each allow independent left-right airflow control, giving occupants flexible ventilation direction while maintaining a symmetrical exterior facade.
- 44mm Ultra-Wide Insulation Strip: The S9's 44mm extra-wide thermal-break strip, combined with multi-cavity aluminum profiles, reduces heat transfer across the frame to support energy-efficient building envelopes in varied climates.
- Three-Seal Weather Protection: A three-seal structure with EPDM water-swelling seal strips addresses air and water infiltration at multiple contact points, helping maintain tightness under wind-driven rain conditions.
- Safety Hardware Suite: Custom child-safe handles, anti-pull angled transmission boxes, two-point locks, roller-sleeve lock points, and anti-pry strike plates work together to resist forced entry and protect young occupants.
- Verified Class 6–9 Ratings: Manual parameters confirm water tightness at 700Pa Class 6, air tightness at 1.2 Class 8, sound insulation at 35dB Class 4, thermal at 2.0W Class 6, and wind pressure at 5kPa Class 9.
- Custom Glass Upgrades: Beyond standard 5+27A+5 tempered glass, options include argon gas, Low-E, laminated, frosted, tinted, ultra-clear, and blinds glass — buyers should confirm how each affects U-value and acoustic performance.
Customizable Styles
- Glass: Standard 5+27A+5 fluorocarbon insulated aluminum spacer glass; custom options include argon, Low-E, laminated, frosted, tinted, ultra-clear, and blinds glass.
- Frame: S9 thermal-break aluminum profile at 109mm with 1.8mm wall thickness; R8Y (118mm) and E0 (100mm) alternatives available for different project tiers.
- Size: Overall 48 x 36 in (1219 x 914mm); casement sash range 400–750mm wide × 400–1500mm high; custom dimensions supported per project drawings.
- Color/Finish: Sand Gray, Dark Coffee, Black Crystal, Starry Black, White, Black Walnut, Pear Wood, Fluorocarbon Flash Silver, Indigo Gray, Mint Gold; powder coating, fluorocarbon, wood grain, metallic finishes.
- Opening/Structure: Outward casement, top-hung, or outward top-hung; structures include single, double, fixed+operable, three-segment, upper transom, multi-lite, curtain wall, and custom shapes.
Hardware Accessories
- Handle: Custom child-safe handle standard; optional fingerprint, password, or keyed handle upgrades; R8Y uses WEHAG baseless handle.
- Hinge: 13-inch casement friction hinge on S9; R8Y uses 12-inch friction hinge; custom load-bearing hinge supports sash weight across opening cycles.
- Lock System: Two-point lock with roller-sleeve lock points and anti-pry strike plates; R8Y offers custom black zinc alloy four-face six-point lock.
- Transmission: Anti-pull angled transmission box transfers handle force to lock points; resists forced pulling of the sash from the frame.
- Sealing: EPDM water-swelling seal strip expands on contact with water; three-seal structure with optional 48-mesh high-transparency screen or steel wire mesh.
Basic Parameters
| Performance Item | Available Information | Buyer Notes |
|---|---|---|
| Thermal Insulation | 2.0W Class 6 | Confirm precise U-value with specific glass configuration; Low-E or argon may affect results. |
| Wind Pressure Resistance | 5kPa Class 9 | Confirm applicable testing standards and methods for the target market. |
| Water Tightness | 700Pa Class 6 | Verify test pressure and standard applicability for local weather conditions. |
| Air Tightness | 1.2 Class 8 | Confirm test standard and whether ratings apply to the selected configuration. |
| Sound Insulation | 35dB Class 4 | Confirm test frequency range and glass type used during rating. |
Product Specifications
| Specification | Detail |
|---|---|
| Product Name | 48 x 36 Double Casement Window |
| Product Type | Thermal-break aluminum outward casement window (custom-made) |
| Material | Thermal-break aluminum, 1.8mm wall thickness, multi-cavity profile |
| Glass Type | 5+27A+5 fluorocarbon insulated aluminum spacer tempered glass (standard) |
| Glass Thickness | 5+27A+5 standard; additional thickness options to be confirmed with supplier |
| Frame Option | S9: 109mm, 44/24/15mm strip; R8Y: 118mm, 35/34/16mm; E0: 100mm, 35/30/12mm |
| Hardware | Child-safe handle, 13-inch friction hinge, two-point lock, anti-pry strike plates, EPDM seal |
| Opening Style | Outward casement, top-hung, outward top-hung; glass sash outward, screen sash inward |
| Size Range | Overall 48 x 36 in (1219 x 914mm); casement sash 400–750mm W × 400–1500mm H |
| Application | Modern residences, new-build projects, commercial buildings, high-end residential |
| Customization | Custom sizes, colors, glass, hardware, structures, and screen options supported |
| Notes | Custom product, not stock; MOQ and delivery subject to confirmation; cross-section drawings on request |
Advantages
- Balanced Ventilation Design: Two opposing operable sashes share glass weight while delivering independent left-right airflow, creating symmetrical facades suited to modern architectural requirements.
- Multi-Series Flexibility: S9 (high-end), R8Y (safety/coastal), and E0 (budget/batch) tiers cover different project budgets — all sharing verified Class 6–9 performance ratings.
- Thermal-Break Engineering: 44mm ultra-wide insulation strip, multi-cavity profile, and three-seal structure work together to reduce heat transfer and support energy-efficient building targets.
- Export-Ready Packaging: Four-layer protection — anti-scratch film, pearl cotton, waterproof outer film, and fully enclosed wooden rack — supports international shipping to port or door.
- Customization Scope: Glass upgrades, twelve-plus color options, multiple structural layouts, and hardware choices let buyers align specifications with project drawings and compliance requirements.
Application Scenarios
- Apartment: In multi-unit residential buildings, the double sash configuration provides cross-ventilation without requiring large opening areas, making it practical for compact living spaces where airflow direction matters.
- Home Office: For home workspaces, the 35dB sound insulation rating helps reduce street noise, while the outward-opening sash keeps interior floor space clear for desks and equipment.
- Hotel: Hospitality projects benefit from the symmetrical facade and child-safe hardware, giving guest rooms a clean exterior appearance while maintaining occupant safety and independent ventilation control per room.
- Office Building: Commercial 48 x 36 double casement window installations in office environments pair thermal-break performance with outward opening to preserve valuable interior floor area along glazed facades.
- Outdoor: For exposed installations, buyers should confirm water tightness, wind pressure ratings, and surface finish durability against local climate conditions before finalizing the configuration and installation method.
- Residential Building: New-build developments can specify the E0 series for batch consistency or the S9 for upgraded units, with all series sharing the same verified performance parameters across the project.
- Exterior: Exterior wall applications require confirmation of weather resistance, seal compatibility, and mounting conditions — buyers should verify that the selected finish and glass configuration suit the exposure level.
- Villa: High-end villa projects can leverage the S9's 44mm insulation strip and extensive color palette to match architectural themes, with custom glass and hardware upgrades available for premium living spaces.
Inquiry Guidance
To request a quote, please share your project location, required size, quantity, preferred frame color, glass type, hardware requirements, and drawings or reference photos if available.
FAQ
Is this a stock window or a custom product?
This is a DERCHI custom thermal-break aluminum casement window, not a stock standard item. Each unit is manufactured to project specifications including size, glass, color, and hardware. Buyers should provide drawings for accurate production.
What information is needed for a quote?
To receive an accurate quotation, provide opening size, project drawings, glass type, color/finish, hardware selection, quantity, destination port or address, and any certification requirements. A 48 x 36 double casement window supplier can then configure pricing accordingly.
What is the delivery time?
Platform data indicates approximately 25–35 days, but this is approximate and may vary by order specifics, quantity, and customization level. Buyers should confirm exact lead time and production capacity with the supplier during inquiry.
What is the MOQ?
Common platform reference indicates approximately 2 square meters, though this should not be treated as universally fixed. Buyers should confirm the applicable MOQ for their specific project quantity and configuration during quotation.
Which colors are available?
Verified S9 colors include Sand Gray, Dark Coffee, Black Crystal, Starry Black, Light Coffee, White, Dark Skin, Black Walnut, Pear Wood, Fluorocarbon Flash Silver, Indigo Gray, and Mint Gold. E5N color card shades require confirmation for S9.
How do I choose between S9, R8Y, and E0?
S9 suits high-end residential and commercial projects; R8Y adds safety features like anti-fall rope and anti-theft screen for coastal or typhoon-prone areas; E0 serves budget-sensitive batch engineering. All three share the same verified performance ratings.
What certifications are available?
The official website references CE, NFRC, CSA, and US/AU IGCC glass certifications. Buyers should request specific document numbers and validity dates during inquiry and verify that certifications apply to the selected product configuration and target market.
