DERCHI 78 Series 72 inch wide accordion doors deliver large foldable openings with thermal break aluminum construction. Designed for balconies, terraces, and commercial spaces, this folding door combines wide access with energy-efficient insulation and foldable panel storage.
- Lower load-bearing, upper guide sliding design for smooth and stable folding operation
- KERSSENBERG hardware system with hidden hinges and built-in adjustment
- C1–C9 opening configurations for single-side, double-side, and multi-panel layouts
- 14.8mm thermal strip reduces heat transfer for climate-controlled comfort
Product Details
The 78 Series thermal break folding door uses a lower load-bearing, upper guide sliding design principle — lower rollers carry the panel weight while upper wheels guide movement along the track. A 14.8mm thermal break strip interrupts the aluminum profile's heat conduction path, reducing thermal transfer between interior and exterior surfaces. Unlike ordinary folding doors that lack thermal break engineering, this structure addresses both energy efficiency and structural stability. A reinforced center pillar between door panels distributes force evenly and improves wind pressure resistance, which is critical for exposed installations where doors face direct weather loads.
This folding door solves the challenge of connecting indoor and outdoor spaces without sacrificing insulation performance. When closed, the hidden hinge design presents a clean, uninterrupted surface. When opened, panels fold to one or both sides, maximizing usable floor space. The combination of thermal break insulation, reinforced structure, and aesthetic refinement makes it suitable for residential balconies and courtyards as well as commercial restaurants and cafes requiring flexible facade operation.
Product Features
Thermal Break Insulation: A 14.8mm thermal strip reduces heat transfer through the aluminum profile, helping maintain indoor temperature and lowering energy costs for climate-controlled spaces.
Lower Load-Bearing Upper Guide Sliding: The lower rollers bear panel weight while upper wheels guide movement along the track, ensuring smooth and stable folding operation over long-term daily use.
Hidden Hinge Design: Hinges are concealed when door panels are closed, delivering a clean and refined appearance suited to premium architectural and interior design projects.
Built-In Hinge Adjustment: Hinges include an adjustment function to correct door panel sagging after installation, reducing maintenance calls and improving long-term alignment and operation performance.
Reinforced Center Pillar: An added structural pillar between door panels distributes force evenly and improves wind pressure resistance for exposed balcony, terrace, and courtyard installations.
Automatic Locking Mechanism: The door panels lock automatically when closed, providing security convenience without additional manual locking steps for daily operation and access control.
Customizable Styles
Glass Configuration: Choose standard 5+27A+5 double tempered insulating glass or upgrade to 5G+27A+5G, with optional 27A electric blinds for integrated privacy control.
Opening Configuration: Select from C1–C9 custom opening styles including single-side folding, double-side folding, and multi-panel combinations to match your project layout requirements.
Track Type: Choose high track for superior sealing and drainage, or water-blocking low track for easier threshold access and barrier-free passage.
Frame Color: Available in powder coating colors including sand grey, dark coffee, light coffee, and white, plus stock colors like indigo grey and black walnut.
Trim and Edge Wrapping: Six trim options — New 47, New 70, New 75, European 80, New 100, European 110 — for architectural design coordination and project-specific finishing.
Hardware Accessories
KERSSENBERG Hidden Hinges: Concealed hinges with built-in adjustment function to correct panel sagging, maintaining alignment and smooth operation after installation.
KERSSENBERG Aluminum Handle: An ergonomic aluminum handle provides comfortable grip and durable performance for daily folding door operation and access.
Lower Load-Bearing Rollers: Available in 3+1 and 2+2 configurations, supporting panel weight for smooth and stable folding movement along the lower track.
Upper Positioning Wheel: Guides door panels along the upper track to maintain alignment and prevent lateral drift during opening and closing operation.
Automatic Lock with Key Cylinder: Standard key lock cylinder with automatic locking when door closes, combining security convenience with reliable access control.
Basic Parameters
Performance Item | Available Information | Buyer Notes |
|---|---|---|
Thermal Insulation | Class 6 / value pending unit verification | Confirm correct unit and value from official test report before project submission |
Wind Pressure Resistance | Class 8 / 4.5KPa | Verify with official test report for project compliance and bidding documentation |
Water Tightness | Class 4 / 350Pa | Verify with official test report for project compliance and bidding documentation |
Air Tightness | Class 7 / 1.8m³/(m·h) | Verify with official test report for project compliance and bidding documentation |
Sound Insulation | Class 3 / 30dB | Verify with official test report for project compliance and bidding documentation |
Product Specifications
Parameter | Specification |
|---|---|
Product Name | 78 Series Thermal Break Aluminum Folding Door |
Product Type | Thermal break aluminum folding door |
Material | Thermal break aluminum profile |
Glass Type | Double tempered insulating glass |
Glass Thickness | 5+27A+5 / 5G+27A+5G |
Frame Width | 77.3mm |
Thermal Strip Width | 14.8mm |
Hardware | KERSSENBERG system |
Opening Style | C1–C9 configurations; 4+0 (low track) and 2+2 (high track) |
Single Panel Width | 500–800mm |
Single Panel Height | 1000–2800mm |
Grid Bar | 25×25 |
Application | Balcony, terrace, courtyard, commercial space, indoor partition |
Customization | Glass, color, track type, trim options, opening configuration |
Notes | Profile wall thickness to be confirmed with production drawings; overall assembly width depends on panel count |
Advantages
Large Opening Flexibility: Foldable panels create wide unobstructed openings, connecting indoor and outdoor spaces for balconies, terraces, and commercial facade applications.
Thermal Break Energy Efficiency: A 14.8mm thermal strip reduces heat transfer, supporting energy-conscious building design and occupant comfort in climate-controlled environments.
Premium Hardware Reliability: KERSSENBERG branded hardware system provides consistent operation quality with built-in adjustment for long-term alignment and performance.
Project Configuration Versatility: C1–C9 opening styles, dual track options, and multiple color choices accommodate diverse architectural and functional project requirements.
Structural Wind Resistance: Reinforced center pillar and lower load-bearing design improve force distribution and wind pressure resistance for exposed installations.
Application Scenarios
Apartment: The foldable panels open balcony spaces to living areas, maximizing natural light and ventilation while maintaining thermal insulation when closed for year-round occupant comfort.
Home Office: An operable glass partition separates the workspace from living areas, allowing privacy during work hours and open space when needed for flexible home use.
Hotel: Large folding openings connect lobby lounges to outdoor terraces, creating flexible guest areas that adapt to seasonal use and varying event layout requirements for hospitality venues.
Office Building: Thermal break folding doors divide conference areas or connect interior spaces to balconies, balancing climate control with open-plan collaboration and natural daylight access for productivity.
Outdoor: Weather-resistant aluminum construction with rated water tightness suits exposed terrace and courtyard installations; buyers should confirm weather resistance, drainage, and surface finish for specific outdoor conditions.
Residential Building: Multiple opening configurations and color options allow specification compliance for residential projects requiring both verified performance ratings and aesthetic coordination with the overall building design.
Exterior: The reinforced center pillar and wind pressure resistance suit exterior facade applications; confirm water tightness, wind load rating, and installation conditions for direct weather exposure projects.
Villa: Premium hidden hinge design and large glass panels complement high-end residential architecture, creating seamless indoor-outdoor living connections for pool areas, gardens, and private courtyard spaces.
FAQ
What are 72 inch wide accordion doors?
DERCHI 78 Series thermal break aluminum folding doors provide large foldable openings with 14.8mm thermal strip insulation, suitable for residential and commercial projects requiring wide, flexible access between indoor and outdoor spaces.
Where can these folding doors be used?
Suitable for balconies, terraces, courtyards, pool areas, living room openings, and commercial spaces like restaurants and cafes needing flexible indoor-outdoor connections with thermal insulation performance.
Can the folding door be customized for my project?
Yes, C1–C9 opening configurations, high or low track options, multiple glass types, color choices, and six trim options are available to match specific project requirements and architectural designs.
What information is needed for a quote?
Provide panel quantity, opening dimensions, preferred configuration style, glass type, track preference, color selection, and project location so DERCHI can prepare an accurate quotation for your order.
Do you support B2B bulk and project orders?
Yes, DERCHI supports project procurement with detailed specifications, multiple configuration options, and performance data. Contact the team directly for project terms, volume pricing, and delivery scheduling.
Are technical documents available for engineering reference?
Product specifications, performance ratings, and profile details are available for engineering take-offs. Request official test reports from DERCHI for project submission and compliance verification purposes.
What should I confirm before placing an order?
Confirm opening dimensions, panel count, configuration style, track type, glass specification, color, and trim option. Also verify profile wall thickness against the current production standard before ordering.
What about certifications, packaging, and shipping?
Contact DERCHI directly for current certification status applicable to your target market, standard packaging details, and shipping lead times specific to your region and order volume requirements.
