The 36 x 40 casement window from DERCHI is a custom-made thermal-break aluminum system window sized 914 x 1016 mm, covering approximately 0.93 square meters. The primary E5N Langyue series offers inward-opening tilt-and-turn functionality, while S9 Xingguang and R8Y Ruixuan series provide outward-opening alternatives for different project requirements.
- Made-to-size thermal-break aluminum construction — not a stock standard window
- Three DERCHI series available: E5N (85mm frame), S9 (109mm frame), R8Y (118mm frame)
- Configurable glass, hardware, color, structure, and screen options for project-specific needs
Product Details
The E5N Langyue series serves as the primary configuration for this custom 36 x 40 casement window, featuring an 85mm frame width, 2.0mm wall thickness, and 35mm PA66 insulation strip. Standard glazing is 5+27A+5 double-tempered insulating glass with a black PVDF spacer carrying the DERCHI logo. The internal/external pressure strip process supports 48/88 edge banding, while triple sealing with glue-injected corner joints followed by silicone application addresses air and water infiltration. If configured as a double sash, each sash measures approximately 18.0in (457mm); a three-pane layout gives each pane roughly 12.0in (305mm).
For projects requiring outward-opening configurations, the S9 Xingguang series offers a 109mm frame with 44/24/15mm multi-strip insulation, and the R8Y Ruixuan series provides a 118mm frame with 35/34/16mm strips, equal-pressure drainage, and EPDM water-swelling weather strip. Export packaging includes four-layer protection — anti-scratch film, pearl cotton, waterproof outer film, and a fully enclosed wooden frame — with optional PE anti-seawater film and air bag isolation for maritime shipping. Delivery runs approximately 25-35 days, with door-to-door or port delivery available.
Product Features
- Thermal-Break Engineering: PA66 insulation strips — 35mm on E5N, multi-strip on S9 and R8Y — separate interior and exterior aluminum profiles, reducing heat transfer across the frame for energy-conscious projects.
- Triple Seal Construction: Glue-injected corner joints followed by silicone application form a continuous triple-seal perimeter on E5N, while R8Y adds equal-pressure drainage and EPDM water-swelling strip for enhanced weather management.
- Configurable Glass System: Standard 5+27A+5 double-tempered insulating glass carries a black PVDF spacer with DERCHI branding. Buyers can select argon, Low-E, laminated, frosted, tinted, ultra-clear, or louvered glass for project-specific thermal and acoustic targets.
- Opening Functionality: E5N provides 90-degree inward opening with a concealed tilt-and-turn hinge for ventilation control and interior cleaning access. S9 and R8Y offer outward opening and top-hung configurations with friction hinges.
- Structure Versatility: Fifteen-plus layout options include single sash, double sash, three-pane, fixed-plus-opening, top transom, bottom fixed, asymmetric, multi-pane curtain wall, pitched, trapezoidal, and hexagonal or bay window combinations.
- Export Packaging Readiness: Four-layer protection — anti-scratch film, pearl cotton, waterproof outer film, and wooden frame — plus optional PE anti-seawater film and air bag isolation, supports commercial 36 x 40 casement window orders for overseas projects.
Customizable Styles
- Glass Configuration: Argon gas, Low-E, laminated, frosted, tinted, ultra-clear, and louvered glass options are available. U-value and SHGC vary by selection — confirm ratings for your chosen glass type.
- Color and Finish: Verified colors include Sand Gray, Dark Coffee, Black Crystal, White, Black Walnut, Indigo Gray, Mint Gold, and more. Surface finishes cover powder coating, fluorocarbon, wood grain, and metallic flash silver.
- Hardware Selection: Base WEHAG or Winkhaus handles pair with optional fingerprint, password, keyed, or 180-degree tilt-and-turn accessories. Verify hardware availability for your selected series and project region.
- Structure Layout: Options span single sash inward, double sash outward, fixed-plus-opening, three-segment, top transom, bottom fixed, left-right asymmetric, multi-pane curtain wall, and pitched or bay window combinations.
- Size and Screen: Title size is 36 x 40 in (914 x 1016 mm). E5N sash width spans 508-1000mm; height differs between sources — your 36 x 40 casement window manufacturer should confirm before production.
Hardware Accessories
- E5N Handle: German WEHAG or Winkhaus baseless handle provides the primary operating mechanism for E5N inward-opening sashes, with a 90-degree inward opening angle for ventilation and cleaning access.
- E5N Concealed Hinge: Hidden tilt-and-turn hinge mechanism supports both tilt and turn opening modes without visible hardware protrusion, maintaining clean interior aesthetics while enabling dual-position ventilation control.
- S9 Friction Hinge: The S9 series uses a 13-inch friction hinge paired with custom lock points and lock seats, plus an optional child-safe handle for projects requiring restricted opening.
- R8Y Multi-Point Lock: R8Y features a WEHAG baseless handle with a 12-inch friction hinge and a custom black zinc alloy four-side six-point lock for enhanced security applications.
- Optional Accessories: E5N supports fingerprint handles, password handles, 180-degree tilt-and-turn accessories, and sound or insulation cotton. S9 adds optional 48-mesh screen, steel wire mesh, guardrail, and louver configurations.
Basic Parameters
| Performance Item | Available Information | Buyer Notes |
|---|---|---|
| Thermal Insulation | E5N: 1.8W level; S9/R8Y: 2.0W level 6 | Confirm exact U-value with your selected glass configuration before ordering. |
| Wind Pressure Resistance | E5N: approximately 5kPa; S9/R8Y: 5kPa level 9 | Verify applicable standard and test report availability for your destination market. |
| Water Tightness | E5N: 550-700Pa; S9/R8Y: 700Pa level 6 | Confirm exact value for with-screen or without-screen configuration before ordering. |
| Air Tightness | E5N: 1.2; S9/R8Y: 1.2 level 8 | Confirm applicable classification standard and level for your destination market. |
| Sound Insulation | All series: 35dB (E5N base, S9/R8Y level 4) | Verify rating with your specific glass type and thickness selection. |
Product Specifications
| Specification | Details |
|---|---|
| Product Name | 36 x 40 Casement Window (DERCHI) |
| Product Type | Custom-made thermal-break aluminum casement window |
| Material | Thermal-break aluminum profile with PA66 insulation strip |
| Glass Type | 5+27A+5 double-tempered insulating (standard); argon, Low-E, laminated, frosted, tinted, ultra-clear, louvered (optional) |
| Glass Thickness | 5mm + 27mm airspace + 5mm (standard configuration) |
| Frame Option | E5N: 85mm frame, 2.0mm wall; S9: 109mm, 1.8mm wall; R8Y: 118mm, 1.8mm wall |
| Hardware | WEHAG/Winkhaus handles, concealed hinges, friction hinges, multi-point locks |
| Opening Style | E5N: inward tilt-and-turn; S9/R8Y: outward opening, top-hung |
| Size Range | Title: 36 x 40 in (914 x 1016 mm); E5N sash width 508-1000mm, height 560-2000mm or 600-2000mm (confirm) |
| Application | Residential, commercial, coastal, high-rise, security-sensitive projects |
| Customization | Glass, color, finish, hardware, structure, screen — confirm with supplier |
| Notes | Platform reference MOQ: 2 sqm; delivery approximately 25-35 days; reference price 79-109 USD/sqm (platform only, not transaction price) |
Advantages
- System Window Engineering: Thermal-break aluminum profiles with PA66 strips, triple sealing, and glue-injected corner joints distinguish this from generic aluminum windows — engineered for made-to-size project specifications.
- German Hardware Partnership: WEHAG and Winkhaus baseless handles, concealed tilt-and-turn hinges, and multi-point locks provide proven operating mechanisms across E5N, S9, and R8Y series configurations.
- Multi-Series Flexibility: E5N covers inward tilt-and-turn needs, S9 offers outward opening with child-safe hardware, and R8Y targets coastal and security applications with equal-pressure drainage and six-point locking.
- Glass Customization Depth: Seven-plus glass types — argon, Low-E, laminated, frosted, tinted, ultra-clear, louvered — let buyers match thermal, acoustic, and privacy requirements to specific project conditions.
- Export Logistics Readiness: Four-layer packaging with optional PE anti-seawater film and air bag isolation, plus door-to-door or port delivery, supports 36 x 40 casement window wholesale orders for overseas projects.
Application Scenarios
- Apartment: E5N inward-opening tilt-and-turn suits apartment interiors where exterior clearance is limited. The tilt position provides controlled ventilation without swinging into living space, and inward opening simplifies exterior glass cleaning from inside.
- Home Office: Sound insulation rated at 35dB on all series helps reduce street and neighborhood noise. Optional laminated or sound-insulation cotton can further improve acoustic performance for focused work environments.
- Hotel: The 36 x 40 proportion fits typical hotel guestroom window openings. E5N concealed hinges maintain clean interior lines, while configurable color finishes coordinate with room design palettes and branding requirements.
- Office Building: Fixed-plus-opening and multi-pane curtain wall structure options support large commercial glazing facades. S9 and R8Y outward-opening configurations free interior floor space for furniture and workstation layouts.
- Outdoor: Buyers should confirm water tightness, wind pressure resistance, and surface finish durability for exposed installations. R8Y equal-pressure drainage and EPDM water-swelling strip may suit weather-exposed conditions — verify performance ratings before ordering.
- Residential Building: Multiple color and finish options — powder coating, fluorocarbon, wood grain — allow coordination with residential exterior palettes. Structure options from single sash to multi-pane accommodate various room and opening sizes.
- Exterior: For exterior facade applications, confirm fluorocarbon or powder coating weather resistance, wind pressure ratings, and installation conditions. S9 references CE, NFRC, and CSA certifications — buyers should verify current validity for their market.
- Villa: Villa projects benefit from the full color card range including Black Walnut, Pear Wood, and Caramel Coffee finishes. R8Y six-point lock and optional steel wire mesh address security requirements for ground-floor installations.
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
Which DERCHI series fits my 36 x 40 casement window project?
E5N offers inward tilt-and-turn opening for interior cleaning and ventilation control. S9 provides outward opening with child-safe hardware. R8Y targets coastal and security applications with equal-pressure drainage and six-point locking.
What glass, color, hardware, and structure options are available?
Glass options include argon, Low-E, laminated, frosted, tinted, ultra-clear, and louvered. Colors span Sand Gray to Pearl White. Hardware ranges from WEHAG handles to fingerprint and password options. Structure covers single sash through multi-pane curtain wall.
Are the performance ratings guaranteed for my configuration?
E5N performance values may vary between with-screen and without-screen versions. S9 and R8Y ratings depend on glass configuration. Buyers should request test reports for their specific series and confirm U-value and SHGC for selected glass.
What information do I need for an accurate quote?
Provide quantity, destination port or address, drawings or opening dimensions, series selection (E5N, S9, or R8Y), glass type, color and finish, hardware, structure layout, screen requirement, and packaging preference for a precise quotation.
What is the reference price range?
Platform pages show reference ranges of approximately 79-109 USD per square meter for standard casement windows and tiered pricing of 99-129 USD for high-impact, hurricane, or thermal-break configurations. These are reference only — request a quotation for actual pricing.
What is the lead time and delivery method?
Delivery runs approximately 25-35 days. Both door-to-door service and port delivery are available. For bulk orders, confirm production capacity and lead time with your 36 x 40 casement window supplier based on project volume.
What should I confirm before ordering?
Confirm the exact E5N sash height range (manual shows 600-2000mm, export page shows 560-2000mm), warranty terms, installation instructions, certification validity for your market, window weight for shipping, and glazing bead profile for your glass thickness.
