WN-94 Series Insulated Inswing Casement Window

Quiet, warm, and secure inswing casement window with thermal-break aluminum, 5+27A+5 insulated glazing, and EPDM sealing—engineered for stormproof performance and low drafts.

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Insulated Inswing Casement Window for Quiet Warm Safe Living

DERCHI insulated inswing casement window uses thermal breaks, insulated glass, and multi-seal construction to reduce heat loss, drafts, and water entry.

44mm PA66 GF25 thermal break reduces heat flow through the frame.

27A insulated glass unit, argon-filled, with warm-edge spacer.

2.0mm aluminum profile supports structural load and wind pressure.

Flow-guided corner injection and full cavity sealing limit water leaks at joints.

Triple gaskets on operable sash improve air and water sealing.

Optional stainless mesh screen; high-transparency mesh available.

Frame grades: commercial, project, or residential mid-range and premium.

Design supports energy saving and lower heating and cooling load.

Documentation supports global qualification and project compliance.

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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.

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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.

Branded insulated glass system

Uses brand glass to improve supply consistency. Low-E silver coating helps control solar gain and heat loss. Tempered glass supports safety needs. Acoustic glazing options are available; results depend on glass build and test setup.

44mm extra-wide thermal break

44mm thermal break extends the heat path to reduce frame heat transfer. PA66GF25 reinforced polyamide supports dimensional stability. Helps improve condensation control when paired with correct glazing and sealing.

EPDM sealing rubber strip

EPDM gaskets support weather resistance and aging control. Elasticity range helps the sash maintain contact through temperature changes. Supports airtightness and watertightness targets over long service cycles.

Pressure-equalized drainage design

Uses a layered sealing layout with a drainage cavity and pressure balance path. Manages wind-driven rain by controlling where water goes and where air is sealed. Reduces leakage risk at the sash/frame interface.

Four-side six lock points

Multi-point locking distributes closing force around the sash. Improves anti-pry resistance and keeps compression even on seals. Supports consistent sealing on inward swing casement windows under load.

Sealant-filled angle code / corner joint

Reinforced corner cleats strengthen frame joints. Sealant filling reduces potential leak paths at miters. Helps keep frame alignment for stable operation and repeatable sealing performance.

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.

System Structure

Thermal-break inswing structure with multi-chamber profiles. 94mm frame depth. 2.0mm wall thickness. 6063-T5 primary aluminum. Closed-chamber glazing bead design supports glass retention and frame stability.

Thermal Break & Insulation

44mm PA66 GF25 thermal-break strip reduces thermal bridging. Optional high-insulation filler improves thermal control inside profile cavities and supports stable U-value targeting for insulated casement windows.

Glazing Configuration

Standard IGU: 5mm + 27A + 5mm tempered glass. Argon-filled cavity supports insulation stability. Fluorocarbon-coated aluminum spacer supports edge durability and long-term sealing consistency.

Built-in Blind Options

Optional IGU blinds for privacy and light control. 26A magnetic blind option. 27A solar-powered blind option. 27A electric blind option, integrated inside the insulated glass unit.

Corner Reinforcement & Sealing

Flow-guided corner keys with two-part corner injection. Cavity sealing fill strengthens corners and blocks water paths. 45° cut-section sealing on frame/sash, plus added sealing at mullion joints.

Drainage & Water Management

Floor-drain style drainage channels guide water out of the frame. Design supports water control during wind-driven rain and helps reduce standing water inside profile cavities.

Hardware & Ventilation Modes

Tilt-turn hardware supports 180° inswing and tilt mode. Micro-vent function switches between full ventilation and controlled airflow. Optional restrictor stay supports safer opening control.

Screens & Locks

Standard stainless steel screen: 16-mesh 0.4mm. Optional 20-mesh 304 high-clarity or domestic 48-mesh. Screen sash opens inward with cam lock or magnetic lock options.

Finishes, Limits & Upgrades

Powder coating finish with multiple standard colors; fluorocarbon colors optional. Size limits: fixed glass up to 8㎡; operable sash 480–850mm wide, 600–2400mm high. Oversize hardware up to ~1000×2600mm, 130kg; tall-frame reinforcement for 2500–6000mm.

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.

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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.

U-Factor: 0.23

Indicates low heat transfer through the full window unit. Supports energy-code targets and helps stabilize indoor temperature, especially when paired with thermal break profiles and insulated glazing.

Wind Pressure Resistance: 5K Pa

Built to handle high wind load without losing basic function. Supports frame stability, sash alignment, and hardware operation under pressure changes common in high-rise or coastal exposure zones.

SHGC: 0.20

Limits solar heat gain through the glazing system. Helps control cooling demand in warm climates and reduces peak indoor temperature rise during high sun exposure periods.

Water Tightness: 700 Pa

Tested to resist wind-driven rain at 700 Pa. Supports façade water control in storms, helps protect interior finishes, and reduces leakage risk at frame joints, sash corners, and glazing interfaces.

Air Tightness: 1.2 m³/(m·h)

Limits uncontrolled air flow through the operable window assembly. Supports lower HVAC load, reduces drafts near the sash, and improves comfort consistency across seasonal temperature swings.

Sound Insulation: 35 dB

Reduces outdoor noise transmission for typical urban and road-adjacent use cases. Works with insulated glass configuration and sealing strategy to lower perceived noise in bedrooms and living areas.

Inswing Casement Window Specifications

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

Parameter	Details
Product Type	Insulated Inswing Casement Window (Inwards Opening Window)
Opening Options	Tilt and Turn (inward tilt) / Inward Opening (full swing)
Seal Design	Three-seal design
Weatherstripping	Haida (Jiangyin Haida) gaskets
Frame Depth	94 mm
Profile Thickness	2.0 mm
Thermal Break	DERCHI insulation strip
Glass Configuration	5 mm + 27A + 5 mm
Glass Type	Double tempered glass
Gas Fill	Argon-filled option
Spacer	PVDF aluminum spacer
Handle	WEHAG, base-free; black or silver options
Hardware	WEHAG 180° tilt-and-turn accessories
Optional Package	New 48 Pack / New 88 Pack

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.

Apartment

Home Office

Hotel

Office Building

Outdoor

Residential building

Exterior

Villa

This project is for a Georgian villa in the United States. Our main products include sliding doors, fixed windows, folding doors, and French doors.Why do Americans love using doors as windows?

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WN-94(N4) Inswing Casement Window FAQs

1) What performance targets does this inswing casement window support?

Reference data for 94-series inward opening systems lists Water tightness: 700 Pa, Air tightness: 1.2, Wind pressure: 5 kPa, and Sound insulation: 35 dB.

2) What design points support stormproof casement windows requirements?

Documents describe a three-way sealing design with isobaric drainage, plus a six-point lock design for tighter closure control.

3) What glass configuration is used, and can it be upgraded?

The spec lists 5mm + 27A + 5mm insulated glass. It also notes an optional inert gas fill to reduce fogging and condensation risk in the IGU cavity.

4) What are the recommended size limits for the operable sash and fixed glass?

Reference limits show operable sash up to 508–1000 mm (W) and 600–2000 mm (H), with single fixed glass up to 12 m².

5) What options are available for blinds, screens, and hardware?

Options listed include 26A magnetic blinds, 27A electric/solar blinds, insulation cotton, 180° tilt-and-turn hardware, fingerprint/keypad/key handles, and high-transparency mesh. The accessories list also shows a PH307 no-base handle for the inswing glass sash.

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Related Products for System Matching

Recommend compatible window and door systems that share profiles, glazing options, and hardware logic—such as horizontal casement window variants and paired door solutions—so buyers can standardize a full opening package.

WN-94 Series Insulated Inswing Casement Window

Insulated Inswing Casement Window for Quiet Warm Safe Living

Inside Derchi Inswing Casement Window Manufacturing

Customization Options for WN-94(N4) Insulated Inswing Casement Window

1) Configurable Window & Door Layouts

2) Size and Area Limits

3) Standard Optional Colors

WN-94 Series Inswing Casement Window Overview

WN-94(N4) Insulated Inswing Casement Window Advantages

Branded insulated glass system

44mm extra-wide thermal break

EPDM sealing rubber strip

Pressure-equalized drainage design

Four-side six lock points

Sealant-filled angle code / corner joint

Insulated Inswing Casement Window Features

System Structure

Thermal Break & Insulation

Glazing Configuration

Built-in Blind Options

Corner Reinforcement & Sealing

Drainage & Water Management

Hardware & Ventilation Modes

Screens & Locks

Finishes, Limits & Upgrades

Request Performance Data & Quotation Support

Performance Metrics

U-Factor: 0.23

Wind Pressure Resistance: 5K Pa

SHGC: 0.20

Water Tightness: 700 Pa

Air Tightness: 1.2 m³/(m·h)

Sound Insulation: 35 dB

Inswing Casement Window Specifications

Recommended Applications for WN-94 Series

Apartment

Home Office

Hotel

Office Building

Outdoor

Residential building

Exterior

Villa

Why Choose DERCHI for WN-94(N4) Inswing Casement Window

15+ years manufacturing experience

70,000+ ㎡ production base

600,000+ ㎡ annual output

200,000+ delivered cases

Multi-standard certifications

100+ national patents

50+ industry honors

20+ expert R&D team

700+ distributors worldwide

Global material and hardware partnerships

Certifications & Test Reports

Hardware Options

Project References for WN-94(N4) Inswing Casement Window

WN-94(N4) Inswing Casement Window FAQs

More Aluminum Window Options

Aluminum Casement Window

Aluminum Picture Window

Aluminum Sliding Window

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