WN-94 Series Insulated Inswing Casement Window

Inside Derchi Inswing Casement Window Manufacturing

See how Derchi Windows and Doors builds the WN-94 (N4) thermal break inswing casement window system for both residential upgrades and project supply. This video takes you inside our smart manufacturing operation to showcase automated production, dedicated glazing lines, and process-driven quality control designed for consistent output and dependable delivery.

From raw materials to final inspection, we manufacture insulated casement windows engineered for comfort and stability, with configurations suited for stormproof casement windows in demanding climates. You’ll also see how Derchi supports inward swing casement windows for easy cleaning and flexible ventilation, plus horizontal casement window options for specific opening needs.

With customizable glazing, finishes, and hardware, Derchi helps you specify, source, and scale the right inswing casement window solution with confidence.

WN-94 Series Inswing Casement Window Overview

DERCHI Insulated Inswing Casement Window combines inward swing and tilt-and-turn operation. It tilts inward for controlled ventilation. It swings inward for full opening and easier cleaning. Three sealing lines and Haida gaskets support tighter closure.

Key ratings include 700 Pa water tightness, 1.2 m³/(m·h) air tightness, and 5 kPa wind pressure resistance. Sound insulation is 35 dB. U-factor can reach 0.23. SHGC can reach 0.20 for solar control.

The system uses a 94 mm frame with 2.0 mm profile thickness. Standard glazing is 5mm + 27A + 5mm, double tempered, with argon fill options. WEHAG handle and 180° hardware support stable daily operation.

WN-94(N4) Insulated Inswing Casement Window Advantages

This inswing casement window is built around six system advantages—branded insulated glazing, a 44mm PA66GF25 thermal break, EPDM gaskets, pressure-equalized drainage, four-side six-point locking, and sealant-filled corner joints—supporting stormproof casement windows, insulated casement windows, inward swing casement windows, and horizontal casement window projects.

Insulated Inswing Casement Window Features

DERCHI inswing casement window for insulated and stormproof needs, combining thermal-break structure, sealed glazing, controlled ventilation, and defined sizing for residential and project procurement.

Request Performance Data & Quotation Support

Get a targeted proposal for your inswing casement window scope—performance values, glazing options, size limits, and hardware upgrades packaged for comparison, approval, and procurement.

Performance Metrics

DERCHI’s inswing casement window performance set supports stormproof and insulated casement window selection, covering water, air, wind load, acoustics, and core thermal/solar values for inward swing and horizontal casement window comparisons.

Inswing Casement Window Specifications

View standard materials, glazing build, hardware, and key configuration options for this DERCHI system window.

Recommended Applications for WN-94 Series

An inswing casement window works well where users need controlled airflow and easy indoor access for daily operation. The WN-94 is commonly specified across residential and light-commercial spaces where consistent room comfort and straightforward use matter.

15+ years manufacturing experience

Focused on aluminum windows and doors, including inward swing casement windows and horizontal casement window formats.

70,000+ ㎡ production base

Operates a 70,000+ ㎡ factory and a 4,000 ㎡ showroom with 600+ employees to support volume orders and product selection.

600,000+ ㎡ annual output

Scales production to meet project timelines while keeping batch consistency across profiles, glazing, and hardware sets.

200,000+ delivered cases

Builds reference experience across residential and commercial applications, helping reduce sampling and coordination cycles.

Multi-standard certifications

Authorized under NFRC, CE, AS2047, CSA, and ISO9001 to align documentation with different market requirements.

100+ national patents

Covers invention, appearance, and design patents to protect structural concepts and product detailing.

50+ industry honors

Recognized by sector programs and organizations, supporting brand credibility during supplier evaluation.

20+ expert R&D team

Develops system upgrades, hardware matching, and process controls to support stable mass production.

700+ distributors worldwide

Built channel coverage and service experience across 100+ countries to support local project communication.

Global material and hardware partnerships

Works with established raw material and hardware brands to keep supply continuity and component compatibility.

Certifications & Test Reports

Display NFRC, CE, AS2047, CSA, and ISO9001 proof points with report snapshots and key scope notes. Reduce compliance risk and speed up supplier approval for your inswing casement window projects.

Hardware Options

Configure this inswing casement window with handle finishes, a keyed screen handle, lock point/keeper sets, and WEHAG operating hardware. These options support insulated casement windows, stormproof casement windows, and common inward swing casement windows and horizontal casement window layouts.