4 casement windows from DERCHI are organized as a single custom project package — not four identical stock units. Each window can serve a different room: bathroom, bedroom, living room, stairwell, or facade. The primary system is the S9 Starlight thermal-break outward casement window, with R8Y and E0 available as alternatives for safety-focused or budget-sensitive openings. All four windows share unified color, glass, and packaging regardless of which system each opening uses.
- Thermal-break aluminum multi-cavity profile with 1.8mm wall thickness
- Multiple system tiers selectable per opening within one order
- Standard 5+27A+5 fluorocarbon insulated aluminum spacer glass
- Export-ready four-layer protective packaging for overseas shipping
Product Details
The S9 Starlight system uses a 109mm frame with 1.8mm wall thickness and a 44/24/15mm insulation strip configuration. Its multi-cavity aluminum profile, three-seal structure, and 44mm ultra-wide insulation strip work together to reduce U-value and improve thermal and acoustic performance. A micro-elastic glass block minimizes corner stress, and the frame and sash sit on the same horizontal line for a clean exterior appearance. Standard glass is 5+27A+5 fluorocarbon insulated aluminum spacer, double tempered.
Within the 4-window package, buyers can assign different systems to each opening — S9 for the living room, R8Y for coastal-facing windows requiring anti-fall rope and WEHAG hardware, or E0 for budget-sensitive batch applications. All share the same performance ratings: water tightness 700Pa Class 6, air tightness 1.2 Class 8, sound insulation 35dB Class 4, thermal 2.0W Class 6, and wind pressure resistance 5kPa Class 9. Color, glass, and packaging remain unified across the order.
Product Features
- Multi-Cavity Thermal-Break Profile: The 1.8mm wall thickness multi-cavity aluminum profile with 44mm ultra-wide insulation strip reduces heat transfer and supports consistent thermal performance across all four windows in the package.
- Three-Seal Structure: Three sealing layers combined with EPDM water-swelling seal help manage water ingress and air leakage, contributing to the 700Pa Class 6 water tightness and Class 8 air tightness ratings.
- Safety Hardware System: S9 includes a custom child-safe handle, anti-pull angled transmission box, two-point lock, roller-sleeve lock point, and anti-pry strike. R8Y adds an anti-fall rope for upper-floor and coastal installations.
- Verified Performance Ratings: All three primary series share Class 6 water, Class 8 air, Class 4 sound, Class 6 thermal, and Class 9 wind pressure ratings. Buyers should confirm which testing standards these are based on.
- Micro-Elastic Glass Block: This component reduces glass corner stress by accommodating minor dimensional variations, helping maintain seal integrity and glass stability over time in varying climate conditions.
- Frame-Sash Flush Design: Frame and sash sit on the same horizontal line, creating a clean exterior appearance that suits modern residential facades and unified architectural styling across multi-room window packages.
Customizable Styles
- Glass Configuration: Options include argon gas, Low-E, laminated, frosted, tinted, ultra-clear, blinds glass, and PVDF/fluorocarbon insulated aluminum spacer. Buyers should confirm which glass types have performance documents available.
- Color and Finish: Sand Gray, Dark Coffee, Black Crystal, Starry Black, White, Black Walnut, Pear Wood, Fluorocarbon Flash Silver, Indigo Gray, and Mint Gold. Finishes include powder coating, fluorocarbon, wood grain, and metallic flash silver.
- Size Range: S9 casement sash width 400–750mm, height 400–1500mm; outward top-hung width 510–750mm, height 700–1500mm. Single fixed glass maximum 6 square meters. Each window can have different dimensions.
- Frame and System Selection: Choose S9 (109mm frame), R8Y (118mm frame), or E0 (100mm frame) per opening. All use 1.8mm thermal-break aluminum multi-cavity profiles with different insulation strip configurations.
- Opening Combination: Single sash, double sash, fixed+opening, side opening+center fixed, three-segment, top transom, bottom fixed, 4-lite, 5-lite, 6-pane, multi-pane curtain wall, pitched/trapezoidal, and hexagonal/bay window combinations available.
Hardware Accessories
- Handle: S9 uses a custom child-safe handle; R8Y uses a WEHAG baseless handle. Optional fingerprint/password/key handle available for security-enhanced openings. Confirm handle finish options with supplier.
- Friction Hinge: S9 features a 13-inch casement friction hinge; R8Y uses a 12-inch friction hinge. Both support outward opening with controlled sash positioning for ventilation and cleaning access.
- Lock System: S9 includes a two-point lock with roller-sleeve lock point and anti-pry strike; R8Y uses a custom black zinc alloy four-face six-point lock for enhanced security.
- Sealing Hardware: EPDM water-swelling seal expands on contact with water to improve weather resistance. R8Y adds equal-pressure drainage and hidden drainage channels for coastal and heavy-rain environments.
- Optional Accessories: 48-mesh high-transparency screen, special steel wire mesh, guardrail, blinds, and anti-fall rope (R8Y). E0 offers optional 48/88 edge wrapping and top curved arc process.
Basic Parameters
| Performance Item | Available Information | Buyer Notes |
|---|---|---|
| Thermal Insulation | 2.0W Class 6 (S9/R8Y/E0) | Buyers should confirm exact U-value for their specific glass configuration |
| Wind Pressure Resistance | 5kPa Class 9 (S9/R8Y/E0) | Confirm suitability for local building code wind load requirements before ordering |
| Water Tightness | 700Pa Class 6 (S9/R8Y/E0) | Verify which testing standard these performance ratings are based on |
| Air Tightness | 1.2 Class 8 (S9/R8Y/E0) | Buyers should confirm specific units and testing methodology used for these ratings |
| Sound Insulation | 35dB Class 4 (S9/R8Y/E0) | Buyers should confirm which glass configuration is required to achieve this rating |
Product Specifications
| Specification | Details |
|---|---|
| Product Name | 4 Casement Windows – Custom Thermal-Break Aluminum Project Package |
| Product Type | Thermal-break aluminum outward casement window (4-window project package) |
| Primary System | S9 Starlight (R8Y Ruixuan and E0 Glory available as alternatives) |
| Material | Thermal-break aluminum, multi-cavity profile, 1.8mm wall thickness |
| Glass Type | 5+27A+5 fluorocarbon insulated aluminum spacer, double tempered |
| Frame Width | S9: 109mm | R8Y: 118mm | E0: 100mm |
| Insulation Strip | S9: 44/24/15mm | R8Y: 35/34/16mm | E0: 35/30/12mm |
| Opening Style | Outward casement, top-hung, outward-opening top-hung (glass sash outward, screen sash inward) |
| Casement Sash Size | Width 400–750mm, Height 400–1500mm (S9) |
| Top-Hung Sash Size | Width 510–750mm, Height 700–1500mm (S9) |
| Single Fixed Glass Max | 6 square meters |
| Application | Bathroom, bedroom, living room, stairwell, facade — multi-room one-order |
| Customization | Per-opening system selection with unified color, glass, and packaging |
| Notes | Buyers should provide opening dimensions, drawings, and desired opening type per window |
Advantages
- Multi-System Flexibility: E0, S6, S9, R8Y, E5N, and E6N systems are selectable per opening within one order, letting buyers match performance and budget to each room's requirements.
- Unified Project Execution: All four windows share the same color, glass specification, and packaging regardless of system, simplifying installation coordination and maintaining consistent exterior appearance.
- Performance Consistency: S9, R8Y, and E0 all deliver Class 6 water, Class 8 air, Class 4 sound, Class 6 thermal, and Class 9 wind pressure ratings, giving buyers predictable performance across openings.
- Export Packaging: Four-layer protection includes anti-scratch film, pearl cotton, waterproof outer film, and fully enclosed wooden frame, plus PE seawater-resistant film and airbag isolation for overseas shipping.
- Certification Coverage: CE, NFRC, CSA, and US/AU IGCC glass certifications are highlighted on the official website. Buyers should verify current status and applicability to their target market.
Application Scenarios
- Apartment: Space-conscious apartment renovations benefit from the S9 outward casement design, which opens outward to preserve interior floor space. The 4-window package covers kitchen, bathroom, and bedroom openings in one coordinated order.
- Home Office: A home office requires sound control for video calls and focus. The 35dB sound insulation rating with 5+27A+5 double tempered glass helps reduce external traffic and neighborhood noise intrusion.
- Hotel: Hotel projects needing consistent facade appearance across multiple room types can use different systems per opening while maintaining unified color and glass. The four-layer export packaging protects finishes during bulk shipping.
- Office Building: Commercial 4 casement windows suit office buildings where floor-to-ceiling or large openings are split into fixed center panels with side opening sashes. The S9 frame-sash flush design supports modern corporate architecture.
- Outdoor: Balcony or terrace-adjacent installations should confirm water tightness performance under local rainfall conditions. R8Y with equal-pressure drainage and hidden drainage channels is recommended for rain-exposed or coastal outdoor positions.
- Residential Building: Multi-unit residential developments can specify E0 for budget-sensitive batch openings while selecting S9 for higher-end units. All series share the same performance ratings, simplifying specification across project tiers.
- Exterior: Facade and exterior wall installations require verification of wind pressure resistance against local building codes. The 5kPa Class 9 rating applies to all three series; buyers should confirm suitability for their specific glass sizes.
- Villa: Villa projects with large openings and architectural variety benefit from the multi-system approach — S9 for living room expanses, R8Y for upper-floor safety, and custom shapes like bay or hexagonal windows for distinctive character.
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
What exactly is the 4 casement windows package?
It is a custom project package of 4 casement windows — not four identical stock units. Each window can use a different system (S9, R8Y, E0, or others) with unified color, glass, and packaging across the order.
Can each of the four windows have different sizes and systems?
Yes. Each window can be assigned a different system from E0, S6, S9, R8Y, E5N, or E6N with its own opening dimensions and configuration. Color, glass specification, and packaging remain unified across all four.
What information do I need to provide for an accurate quote?
Provide quantity, destination port, opening dimensions per window, desired system per opening, glass type, color/finish, hardware preferences, and packaging requirements. Drawings or sketches help the 4 casement windows supplier prepare a precise quotation.
What is the minimum order quantity?
Platform data shows a common MOQ of approximately 2 square meters, but actual MOQ may vary by project configuration. Confirm the specific MOQ with the supplier for your 4-window package before placing an order.
What certifications are available?
The official website highlights CE, NFRC, CSA, and US/AU IGCC glass certifications. Buyers should verify current certification status and confirm whether the documents apply to their selected product configuration and target market.
What delivery terms and lead time should I expect?
Door-to-door service or port delivery is available. Platform data indicates approximately 25–35 days, but specific conditions are not defined. Confirm exact Incoterms (FOB, CIF, DDP) and lead time for your bulk order with the supplier.
Are technical drawings and test reports available?
Specific CAD files, cross-section details, and test reports are not mentioned in available product data. Buyers should request technical drawings, installation documentation, and testing standard information (EN, ASTM, AS/NZS) before order confirmation.
