Large-Opening Thermal Break Single & Double Hung Window

Q: What aluminum windows and doors can you customize?

AMJ provides custom aluminum casement, tilt and turn, sliding, awning, hung and fixed windows, together with sliding, lift and slide, bifold and hinged doors. Sizes, glass, colors, hardware, screens and opening configurations can be customized.

Q: Can you review our drawings and prepare a project quote?

Yes. AMJ's professional technical team can review architectural drawings, BOQ, window schedules and opening dimensions. Project files can be sent to info@amjbm.com for technical review and a project-specific quotation.

Q: Can you meet project performance and local code requirements?

Product selection can be reviewed according to project location and required U-value, SHGC, design pressure, glass safety and other performance requirements.

Q: What glass and thermal performance options are available?

AMJ offers thermal-break aluminum systems with Low-E, tempered, laminated, insulated, tinted, frosted and argon-filled glass, as well as selected double- and triple-glazing configurations.

Q: How long are production and warranty coverage?

Production can be as fast as 25 days depending on project requirements. Warranty coverage is available for up to 15 years, with longer terms available for selected systems and projects.

Product Item：AMJ 128T Single & Double Hung Windows

✓ Best for tall residential openings, apartments, multi-family projects, and larger North American window packages.

✓ Single-hung, double-hung, upper-hung/lower-fixed, and upper-fixed/lower-hung layouts are available.

✓ 128mm thermal break frame with 1.8mm aluminum profiles and Caldwell balance hardware.

✓ Sash sizes from 350–1200mm wide × 600–3000mm high, up to 40kg.

✓ 5mm + 12A + 5mm insulated glass with fixed stainless steel or fiberglass mesh screens.

✓ Custom sizes, colors, glass, balances, screens, fixed panels, and installation options are available.

NFRC / CSA requirements can be reviewed by project.

Production as fast as 25 days · Warranty coverage up to 15 years.

Product Detail
FAQs

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Upper or lower fixed-glass combinations are available

Single-hung or double-hung vertical sash movement

A Larger Thermal Break Hung Window for Taller Residential Openings

This large-opening aluminum hung window supports wider and taller sash sizes for apartments, townhouses, multi-family housing, and custom residential projects.

A 1.8mm aluminum profile, 128mm system depth, 24mm thermal break, Caldwell balancing hardware, and fixed screen options support single-hung, double-hung, and fixed-and-hung combinations.

1.8mm Aluminum Profile

128mm System Depth

24mm Thermal Break

350–1200 × 600–3000mm Sash Size Range

40kg Maximum Sash Capacity

Why Builders Choose This Large-Opening Hung Window

The system is intended for projects that need larger sash dimensions, a thermal break frame, and more fixed-and-operable layout choices.

Wider and Taller Sash Range

The sash range extends to 1200mm wide and 3000mm high, giving project teams more flexibility for taller openings.

128mm Thermal Break System

The published system dimensions include a 128mm depth and 24mm thermal break for improved frame separation.

Caldwell Balancing Hardware

American Caldwell hardware is supplied in black or white and supports a maximum sash capacity of 40kg.

Fixed-and-Hung Combinations

Available layouts include top fixed with lower hung, upper hung with lower fixed, double hung, and side-by-side fixed combinations.

Large-Opening Single and Double Hung Window Operation

The hung window section starts at approximately 15 seconds and shows the vertical sash movement used by this product type.

Configured for Larger Residential and Apartment Openings

Send the window schedule, rough opening sizes, quantity, glass, strip arrangement, screen choice, and installation detail for review.

Product Configuration

Window typeSingle-hung or double-hung aluminum window.

Profile thickness1.8mm.

Standard hardwareCaldwell balancing hardware in black or white.

Sash size350–1200mm wide × 600–3000mm high.

Maximum sash capacity40kg.

Standard glass5mm + 12A + 5mm insulated glass.

Strip arrangementThe V2 specification lists interior, center, or exterior strip placement with the 5mm + 12A + 5mm IGU.

ScreenFixed stainless steel mesh or fiberglass mesh.

InstallationNail fin or mounting tabs.

Available layoutsTop fixed with lower hung, upper hung with lower fixed, double hung, and side-by-side fixed combinations.

System dimensions128mm system depth; 55mm vertical frame; 55.1mm top frame; 24mm thermal break; 43.5mm bottom frame; 40.3mm meeting rail.

Estimated Performance References

≥0.48Estimated U-Factor
BTU/(h·ft²·°F)

300PaEstimated Water Resistance

0.3 L/s·m²Estimated Air Leakage

≤3000PaEstimated Wind Pressure Resistance

30dBEstimated Sound Insulation

1.8mmAluminum Profile

All performance figures are estimated values from the latest AMJ product specification V2 dated July 23, 2026. Final results depend on window size, glass, configuration, installation, and the applicable project test report.

Top Fixed + Lower Hung

Fixed glass above with a vertically operating lower sash.

Upper Hung + Lower Fixed

Vertically operating upper sash above a fixed lower panel.

Double Hung

Upper and lower sashes can move vertically.

Side-by-Side Combination

Hung windows can be combined with adjacent fixed units.

Our Strength

Production Process Project Services Certificates

1. Checking & Alignment

2. Cutting & Punching

3. Milling Holes

4. Assembly

5. Glass Assembly

6. Packaging

7. Delivery

8. Installation

Drawing & Engineering Review

Sample Support

Quality Inspection

U.S. Showrooms

48-Hour On-Site Support

Warranty Service

NFRC

CSA

ENERGY STAR

ISO

Key Differences Between the Two Hung Window Systems

Only the specifications that differ are shown below. The current product is the Large-Opening Thermal Break Double Hung Window.

Comparison	Standard Aluminum Double Hung Window	Large-Opening Thermal Break Double Hung Window CURRENT
Profile Thickness	1.6mm	1.8mm
Sash Width	350–1000mm	350–1200mm
Sash Height	600–2200mm	600–3000mm
Sash Capacity	25kg standard / 40kg heavy-duty balancer	40kg
Estimated U-Factor	≥0.52 BTU/(h·ft²·°F)	≥0.48 BTU/(h·ft²·°F)
Installation	Nail fin / mounting tabs / screws	Nail fin / mounting tabs
Available Layouts	Single-hung / double-hung / side-by-side fixed combination	Top fixed + lower hung / upper hung + lower fixed / double-hung / side-by-side fixed combination
Published System Dimensions	Not listed in the current V2 specification	128mm depth; 55mm vertical frame; 55.1mm top frame; 24mm thermal break; 43.5mm bottom frame; 40.3mm meeting rail

Frequently Asked Questions

What are the main advantages of this large-opening hung window?

It supports sash sizes up to 1200mm wide and 3000mm high, uses a 1.8mm profile and 24mm thermal break, and offers more fixed-and-hung layout options.

Can it be ordered as single hung or double hung?

Yes. The system supports single-hung and double-hung configurations, subject to the final window schedule and sash calculation.

Which fixed-and-hung combinations are available?

The V2 specification lists top fixed with lower hung, upper hung with lower fixed, double hung, and side-by-side fixed combinations.

What is the maximum sash capacity?

The listed maximum sash capacity is 40kg. Final approval depends on sash size and glass weight.

What information should I send for a quotation?

Send the project location, rough opening sizes or window schedule, quantity, layout, color, glass, screen, installation detail, and delivery ZIP code to info@amjbm.com.

What is the minimum order quantity?

We offer flexible MOQs. Sample sets can be reviewed before bulk production, and tiered pricing is available for full container load project orders.

Start Your Large-Opening Hung Window Project

Send your drawings, window schedule, rough opening sizes, or BOQ for sash sizing, layout review, screen options, and project pricing.

Request a Project Quote Chat on WhatsApp

01 Why work with AMJ for aluminum window and door projects?

AMJ is a professional aluminum window and door manufacturer with nearly 20 years of industry experience and a 430,000 sq ft production base. Our engineering, production, quality-control and project teams support builders, contractors, developers, dealers and importers from product selection through production and delivery.

02 What aluminum windows and doors can you customize?

We provide custom aluminum casement, tilt & turn, sliding, awning, hung and fixed windows, together with sliding, lift & slide, bifold and hinged doors. Sizes, glass, colors, hardware, screens and opening configurations can be customized for residential and commercial projects.

03 What certifications do AMJ windows and doors have?

Selected AMJ aluminum window and door systems are available with NFRC and CSA certification support, ENERGY STAR options and Intertek testing experience. Certification depends on the specific product system, glass configuration, size and project requirements. Our team will confirm the applicable certified solution before quotation.

04 Can you review our drawings and prepare a project quote?

Yes. Our professional technical team can review architectural drawings, BOQ, window schedules and opening dimensions, then help confirm suitable window and door systems, glass, hardware and configurations. Send your project files to info@amjbm.com for technical review and a project-specific quotation.

05 Can you meet project performance and local code requirements?

Product selection can be reviewed according to the project location and required U-value, SHGC, design pressure, glass safety and other performance requirements. Share the project location and specifications with our team so the appropriate frame and glass configuration can be checked before production.

06 What glass and thermal performance options are available?

AMJ offers thermal-break aluminum systems with options including Low-E, tempered, laminated, insulated, tinted, frosted and argon-filled glass, as well as selected double- and triple-glazing configurations. The final setup is matched to the product system and project performance requirements.

07 How long are production and warranty coverage?

Production can be as fast as 25 days depending on quantity, configuration, glass, finish and project complexity. Warranty coverage is available for up to 15 years, with longer terms available for selected systems and projects. Final terms are confirmed according to the order specification.

08 What happens if we need replacement parts or after-sales support?

AMJ supports replacement hardware and service parts for AMJ project orders. Commonly used service components are kept available so our team can respond quickly when replacement or supplementary items are required. Order records also help us confirm the correct specification before arranging support.

09 How are orders packed and delivered?

Products are inspected before packing and protected according to the product type and shipping method. AMJ can support factory, port and door-to-door delivery options. Shipping terms and freight costs are confirmed according to the destination, quantity and project requirements.

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Tags: Large Single Hung Window; Large Double Hung Window; Thermal Break Hung Window; Aluminum Window; Custom Window

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