I’ve worked with property owners who needed better airflow and privacy in tight spaces like basements or restrooms. Hopper windows became the go-to choice, but finding good hopper window manufacturers wasn’t easy.
If you’ve faced the same issue, you’re not alone.
This review is based on real feedback from engineers and buyers I’ve worked with. It covers makers I’ve used or compared in actual projects, not just names found online.
You’ll get a clear look at 7 hopper window manufacturers. The list will help you decide faster and avoid delays in your project.
Let’s say you’re choosing for a hotel, villa, or home, this guide is for you.
Let’s begin!
Quick Comparison
Choosing the right hopper window manufacturer depends on your project’s needs, scale, customization, performance, or price. This table compares key offerings to help you decide more easily:
| Manufacturer | Product Focus | Customization | Production Scale | Tech Level | Sustainability Efforts | Best For |
| Parrett Windows & Doors | Wood, aluminum-clad custom units | High (shapes, sizes) | Low to medium | Moderate | Long lifespan, low waste | Boutique hotels, villas with custom needs |
| Internorm International GmbH | uPVC, alu-clad energy windows | Medium | Very high | Advanced | Low carbon glass, EU compliant | Hotels, villas needing thermal efficiency |
| Vallisco | Aluminum hopper & tilt-turn | High (OEM/ODM) | Medium to high | Modern | Export-ready efficiency focus | Asia & Europe projects needing flexibility |
| G.James Glass & Aluminium | Aluminum systems, glass units | Medium to high | High | High | LED, recycling, local sourcing | Commercial builds across Australia |
| VEKA AG | uPVC profiles, system components | Medium (via partners) | Very high | High automation | Closed-loop recycling | Large-scale energy-efficient projects |
| West Window Corporation | Aluminum & vinyl for commercial | Medium | Medium | Moderate | Domestic sourcing | US-based hotels, schools, institutions |
| Anhui Lagunas Doors & Windows Co. | Aluminum, OEM/ODM units | High (private label) | High (export-based) | Basic to moderate | ISO certified, cost-effective | Low-cost, bulk residential projects |
To read full details on each manufacturer’s capabilities and strengths, check the dedicated reviews below.
1. Parrett Windows & Doors
- Website: https://www.parrettwindows.com
- Location: Dorchester, Wisconsin, USA
- Contacts: info@parrettwindows.com | +1 800‑541‑9527
- Year Founded: 1982
I’ve come across Parrett a few times while sourcing for hotel and villa projects in North America. They’re a company that sticks to detail and flexibility.
Parrett isn’t about mass production. They focus on custom wood and aluminum-clad windows. That makes them a solid choice when you want windows that match a certain style or fit odd sizes.
What stands out is how willing they are to work with you on the small stuff. Special shapes. Custom hardware. Unique finishes. If your project has exact needs, they’ll listen. They’re not the fastest out there, but if you value control over the design, they’re worth a look.
Product Range
- Custom Hopper Windows: Tilt-in hoppers with interior or exterior glazing. Optional screens and hardware for comfort rooms, basements, and side buildings.
- Architectural Shapes: Curved, angled, and arched hopper window frames designed to match historical or special architecture projects.
- Wood Window Systems: Windows made from pine, oak, or mahogany. Available in stained or painted finishes.
- Aluminum-Clad Windows: Wood interiors with durable aluminum exteriors. Good for regions with changing seasons and harsh weather.
- Sash & Frame Combinations: Flexible combinations for multi-window setups or full-room upgrades.
Manufacturing Capabilities
- Custom Builds: Each order is built from scratch using client specifications. This helps meet exact sizing, shape, and finish needs for specialized construction or renovations.
- In-House Production: All units are fabricated in Parrett’s Wisconsin facility. This offers stronger control over build quality, inspection, and project communication with their team.
- Low-Volume Batches: Parrett does not mass produce. Instead, it focuses on small and medium-size project runs that allow higher attention to detail.
- Flexible Material Options: The factory works with hardwood, softwood, and aluminum-clad finishes. Clients can choose based on function, climate, or building design style.
Research & Development (R&D)
Parrett’s R&D work is managed in-house by their engineering and design team. Because every order is built-to-spec, they focus on fine-tuning window design rather than pushing out new product lines.
Their development process includes stress and performance testing for wind, water, and thermal resistance, especially for projects in high-demand weather zones.
They also adapt designs to meet project certifications like NFRC energy ratings or impact glass standards. Though Parrett doesn’t publish many patents, their strength lies in adaptation and long-term reliability.
Sustainability & Ethics
- Selective Sourcing: Parrett uses responsibly sourced wood, often from domestic forests. They avoid using low-quality imported material to improve lifespan and structural stability.
- Built for Longevity: Their windows are designed to last decades with proper care. This reduces landfill waste and minimizes frequent replacements for property owners.
- Low-Waste Production: Since they manufacture per order, there’s little extra inventory or overcutting. That keeps waste low and production more resource efficient.
Takeaway Note
Parrett is best for hotels, villas, and buildings that need window customization, from size to finish to shape. They bring control and precision to each order. However, if you’re sourcing for a fast-build or high-volume development, their made-to-order pace may not align with your timeline.
2. Internorm International GmbH
- Website: https://www.internorm.com
- Location: Traun, Upper Austria, Austria
- Contacts: office@internorm.com | +43 7229 770‑0 (Traun plant)
- Year Founded: 1931
I met Internorm while evaluating high‑end hotel projects in Europe. Their hopper windows caught my eye for precision and energy performance.
They are one of Europe’s largest window brands. They make all parts in Austria across three plants. That includes UPVC, timber‑aluminium, glass, and locks.
They export over half of their output to 22 countries. Their long family‑run history gives them stability and trust in B2B sourcing. You can expect consistent quality from partner architects and building teams across Europe.
Product Range
- uPVC Hopper Windows: Durable single‑tilt hopper units with excellent thermal and sound insulation for renovations or new builds.
- uPVC-Aluminium Hopper Windows: uPVC interior with aluminium exterior. Weather‑resistant and low maintenance for facades and high moisture areas.
- Timber-Aluminium Hopper Windows: Premium timber finish inside and aluminum shell outside. Best when aesthetics and durability matter.
- Integrated Blinds Hopper: Models with I‑tec shading or blinds built into unit. Helps control light and reduces cleaning.
- Special Shapes Hopper: Round or angled hopper windows made for modern or historic designs. Fully custom shapes are possible.
Manufacturing Capabilities
- High Production Volume: Three plants in Austria produce over 3,000 window units per day. That translates into over 134,000 units per year.
- Vertical Integration: They extrude profiles, make glass, assemble units all in‑house. This gives strong quality control and delivery reliability.
- Customization Options: OEM and private label is offered via partner network. You can specify styles, sizes, materials and hardware combinations.
- Automation & Technology: Their sites use advanced extrusion lines and CNC machinery by SCM for complex shapes and high throughput.
Research & Development (R&D)
Internorm runs its own R&D department based in Austria. It works closely with the production teams for real-world feedback.
They developed I‑tec technology, integrated blind systems, hidden locks, smart ventilation. These features are tested under European energy and safety standards.
Internorm tests thermal, air, and water tightness in test labs. They meet energy codes from passive house to commercial upgrades. They adjust designs based on feedback from building and engineering partners.
Sustainability & Ethics
- Low-Carbon Glass Standard: Starting in 2025, they switch to Low-Carbon iPlus coating. It cuts ~6 kg CO₂‑eq per m², with over 50% recycled glass content.
- Energy-Reuse in Plants: At Sarleinsbach, they use cooling water heat to warm buildings. That device saves over 613 tonnes CO₂ per year.
- Timber Waste Heating: In Lannach, off‑cuts of timber are burned to heat kilns and halls, saving over 3 million kWh of gas annually.
- Certified Environment Management: They hold EN ISO 14001:2015 certification. They set clear targets for water usage, recycling, and emissions cuts.
Takeaway Note
Internorm fits well if you need high-volume, reliable hopper window supply with energy performance across Europe. Their in‑house production and R&D give consistent quality.
However, if your project is far outside Europe or needs ultra-fast turnaround at very low cost, then their longer production and logistics time may be a drawback.
3. Vallisco
- Website: https://vallisco.com
- Location: No. 1926, Cao An Highway, Jiading District, Shanghai, China
- Contacts: kelly@vallisco.com | +86 185 0213 6587
- Year Founded: 2007
I first encountered Vallisco while working on a hotel renovation in Southeast Asia. Their slim hopper window systems drew attention. It was clear they took modern design seriously because aesthetics and performance both mattered.
Although Vallisco is new as an independent brand, it builds on 13+ years of experience from Qeeka Home. That means their team and factory have been refining window systems for years before the 2024 launch. They offer aluminum hopper windows with good build quality and factory-direct support.
Your project gains from this heritage. Vallisco combines export logistics and aesthetic flexibility. The newer brand name shouldn’t worry you, they deliver on project form and function in both Europe and Asia.
Product Range
- Aluminum Hopper Windows: Slim, tilt-in units with thermal breaks. Good insulation and contractor-friendly fit for modern villas or hotel basements.
- Tilt‑and‑Turn Windows: Flexible opening design. Ideal for villas or projects that need both airflow and easy cleaning.
- Sliding Glass Systems: Tempered-glass sliders with slim profiles. Common in patios for greenhouses or guesthouses.
- Integrated Door‑Window Systems: Aluminum systems combining doors and hopper windows. Helps in large-scale designs or B&B layouts.
Manufacturing Capabilities
- Factory‑Direct Production: Vallisco builds each unit in its own facility. No middlemen. This gives better communication and control on project specs.
- OEM / ODM Support: They offer private label and custom design services. Builders can create branded systems tailored to project branding and standards.
- Mid‑Volume Export Ready: Built for export to Europe and Southeast Asia. The factory handles bulk orders while keeping flexibility on specifications.
- Automated Processes: The plant uses modern machinery for precise aluminum cutting and assembly. This ensures tight tolerances and consistent quality.
Research & Development (R&D)
Vallisco’s R&D team is based on the same engineers from Qeeka Home. They design products around real project needs, working with hotel and villa developers directly.
They focus on product performance, like sound, thermal, and structural testing. Projects in Germany and Singapore demand energy compliance and tight specs. Vallisco meets those with internal protocols. (PR Newswire)
Though the brand is new, their approach to design and testing comes from over a decade of lessons. They prioritize detailed client feedback and tweak production methods as they go forward.
Sustainability & Ethics
- Experienced Sourcing: As part of Qeeka Home, they benefit from an established material network in Asia. Raw materials are selected with quality and supply chain traceability.
- Performance Focus: Products use thermal breaks and energy-efficient glass to reduce client building energy use and improve comfort.
- Export Packaging Efficiency: The factory optimizes packaging for export to Europe and Asia. This cuts waste and protects products safely in transit.
Takeaway Note
Vallisco is a strong pick if you want modern aluminum hopper windows with good export support and custom design. It combines factory-direct clarity with design flexibility.
However, since it is a newer brand, they may still be building recognition. In rare cases, you may prefer a long-established name if brand legacy matters more than innovation.
4. G.James Glass & Aluminium
- Website: https://gjames.com/
- Location: Brisbane, Queensland, Australia
- Contacts: enquiries@gjames.com.au | +61 7 3216 8000
- Year Founded: 1917
I first learned about G.James while working with a large hotel developer in Australia. They needed aluminum hopper windows in bulk. I saw full factory scale and high consistency firsthand.
G.James is a family‑owned company with over 100 years of experience. They make windows, doors, extrusions, and glass. All manufacturing stays in Australia, across multiple plants. They serve builders and commercial developers with reliable large‑scale supply.
You get strong capacity, local compliance, and quality control. As a B2B buyer, you’ll see focus on volume and standards.
Product Range
- Aluminium Hopper Windows: Tilt‑in units built for apartment or hotel back‑of‑house spaces. Durable and suited to Australian building codes.
- Awning & Casement Series: Hinged windows with water resistance up to 600 Pa. Ideal for bathrooms or low‑rise guest rooms.
- Sliding & Fixed Frame Series: Systems for common walls or curtain walls. Works for patios or facade applications with double glazing.
- EcoTherm Insulated Glass Units: Double or triple‑pane glass units improve insulation and reduce energy use in tropical or temperate climates.
- Louvre & Custom Configurations: Standard and custom louvre setups designed for ventilation or design integration. Useful in sunrooms or service areas.
Manufacturing Capabilities
- High Production Volume: Multiple plants support large orders. They can deliver thousands of windows monthly to commercial projects across Australia.
- Complete In-House Production: All stages, extrusion, glass processing, finishing, are done internally. This ensures quality and control at every step.
- Customization Flexibility: They can adapt extrusions and finishes for custom shapes or branded requirements for project-specific designs.
- Automation & Technology: The Melbourne plant uses robotic glass handling and CNC systems. This raises precision and speeds up production.
Research & Development (R&D)
G.James has labs and engineering teams in-house. They work on performance improvement for acoustic, thermal, and wind resistance.
They develop glass treatments and extrusion profiles to meet Australian standards. They also engage with research partners in manufacturing innovation.
Product testing is done internally and via national labs like NATA. They validate compliance with AS2047 and WERS energy ratings.
Sustainability & Ethics
- Recycled Aluminium Use: Up to 30% of aluminium is recycled scrap. Recycling saves about 90% of energy compared with new aluminium.
- On-Site Waste Recycling: Saw shavings, extrusion scrap, and glass off-cuts are recycled into new products or reused in packaging.
- Energy Efficient Operations: Plants use LED lighting and heat recovery systems. They rely on natural daylight and energy‑saving design to reduce consumption.
- Water Conservation Systems: Surface finishing systems use water-efficient processes. Cooling towers operate under strict environmental standards.
Takeaway Note
G.James is ideal for large B2B projects in Australia needing high-volume aluminum hopper windows with strong local support and production control.
However, since their service doesn’t extend well beyond Australia, if you operate in Europe or Asia, global logistics and lead time may be a limitation.
5. VEKA AG
- Website: https://www.veka.com
- Location: Sendenhorst, Nordrhein‑Westfalen, Germany
- Contacts: info@veka.com | +49 2587 8‑0
- Year Founded: 1967
I discovered VEKA when sourcing window systems for multi‑hotel developments across Europe. They stood out for their profile precision and global reach.
VEKA is a family‑owned firm. It leads the world in uPVC window profiles. They run extrusion factories in 12 countries and serve over 40 markets. You can rely on their history and scale for consistent supply. Their systems support certified energy windows, offering high insulation and a long lifespan.
They work with builders, architects, and fabricators. That makes VEKA a trusted partner in mid and large‑size projects.
Product Range
- uPVC Hopper Profiles: High‑performance A‑class uPVC profiles built to DIN standards. Excellent thermal, acoustic insulation for renovation or new construction.
- Timber‑Look uPVC Systems: Profiles with laminate finishes that mimic timber. Offers aesthetic appeal with low maintenance.
- Tilt‑and‑Turn & Casement Systems: Versatile opening types for airflow and ventilation. Often paired with hopper units for mixed use.
- Colour & Surface Finishes (Spectral): VEKA offers vinyl foils and matte colour options like SPECTRAL for modern design appeal.
- Recycled PVC Units: Profiles partly made from recycled PVC reused from windows and doors. Supports a circular production system.
Manufacturing Capabilities
- High Production Volume: VEKA runs extrusion plants in 12 countries with 24 extrusion lines in India alone. Total output is around 405,000 tonnes per year globally.
- Fully Integrated In‑House Production: VEKA controls profile extrusion, mixing, recycling, and support from materials to delivery, ensuring strong quality consistency.
- Customization & OEM Support: Their fabricator network allows private label or OEM setups. You can specify profile colour, size, hardware, or finish to match project needs.
- Automation & Technology: Facilities use CNC, CAD/CAM, and robotic systems for precise extrusion and finishing. They test profiles by computer scanner for stability.
Research & Development (R&D)
VEKA invests over 10% of turnover into R&D. They develop new profile designs, colour foils, and insulation systems based on customer needs.
They run internal labs and test centers. Profiles undergo thermal, air, and water testing to meet standards like Passive House. They also optimize formulations and manufacturing processes continuously.
R&D is closely tied to field feedback. This helps VEKA respond to energy code updates and design trends with timely product updates.
Sustainability & Ethics
- Closed‑Loop PVC Recycling: VEKA’s Behringen plant recycles old profiles into new ones. That process preserves material quality and limits raw waste.
- Renewable Energy Use: Key sites in Germany run on renewable energy. They also reuse extrusion waste heat. This cuts carbon emissions significantly.
- Certified Management Systems: VEKA holds ISO 9001 for quality and ISO 14001 for environmental management. This underpins their consistent, sustainable operations.
Takeaway Note
VEKA is excellent if you need standard, high‑insulation hopper window profiles at volume across Europe or Asia. Their scale, recycling, and design systems support robust B2B sourcing.
However, because VEKA systems require fabricator networks and profile integration, clients needing full window units ready‑to‑install (rather than branded frames) may prefer direct window manufacturers for turn‑key delivery.
6. West Window Corporation
- Website: https://www.westwindow.com
- Location: Martinsville, Virginia, USA
- Contacts: info@westwindow.com | +1 276‑638‑2394
- Year Founded: 1949
I first worked with West Window on a hotel retrofit in Virginia. Their hopper windows impressed me with rugged build and familiar feel.
West Window is a family-owned, regional U.S. manufacturer. They began as a storm window distributor in 1949 and evolved into a commercial window system provider. They make aluminum and vinyl windows, and their Westco™ thermal series is built for reliability and performance.
They serve schools, hotels, offices, condos, and more. For B2B buyers, this means a trusted supplier of tested and certified window systems.
Product Range
- Westco™ Thermal Aluminum Hopper Windows: Tilt-in hopper models with thermally broken aluminum frames and insulated glass for energy efficiency and durability.
- Commercial Vinyl Hopper Windows: Vinyl-based hopper windows built for retrofit and non-structural openings in commercial and institutional buildings.
- Projection Series Hopper Units: Designed for stacking or mullion systems. Suited to multi-module openings in hotels or schools.
Manufacturing Capabilities
- High Production Volume: The Martinsville facility supports consistent output for regional orders, delivering thousands of units annually to mid-Atlantic projects.
- Complete In-House Fabrication: All stages, extrusion, assembly, glazing, finishing, are done onsite. This ensures quality control and smoother communication.
- Customization Support: Offers flexible options for material, hardware, and glazing based on institutional or architectural standards.
- Advanced Technology Use: Incorporates thermal-break framing, insulated glass units, and NC machinery for precision in their Westco™ product lines.
Research & Development (R&D)
West Window’s R&D is embedded in its design and engineering team. They review field feedback from hotel and institutional clients to refine products.
They operate internal testing on thermal performance, air leakage, and structural integrity. These help meet U.S. codes and commercial standards.
Their team updates designs periodically, using the latest fenestration methods and hardware systems from partners like Truth Hardware.
Sustainability & Ethics
- Local Material Sourcing: Aluminum and vinyl are sourced within U.S. supply chains. This reduces logistics footprint and supports domestic manufacturing.
- Energy-Conserving Design: Thermal frame construction and insulated glass lessen energy use in conditioned buildings.
- Minimal Inventory Waste: Their production system avoids overstock and scrap by building to order in standard series.
Takeaway Note
West Window works well if you need durable hopper windows for commercial or institutional use in the U.S. Their long history and local footprint offer reliability and tested performance.
However, if your project is outside the U.S. or prefers globally recognized brands, lead times and brand recognition may be a limiting factor.
7. Anhui Lagunas Doors & Windows Manufacture Co., Ltd.
- Website: https://www.lagunasbuild.com/
- Location: Huainan City, Anhui Province, China
- Contacts: via their Made‑in‑China listing / inquiry team
- Year Founded: 2015
I found Anhui Lagunas when sourcing for cost‑effective, export‑ready window systems in China. Their hopper windows offer competitive pricing and decent quality.
They started in 2015. They cover about 45,000 ft² of factory space. The team employs roughly 150 trained staff. They support OEM, ODM, and private‑label services. They also export 40–50% of output to Southeast Asia, Africa, Americas, and the Middle East.
Their value lies in volume and flexibility. If you want straightforward hopper windows without high premium, they are worth considering.
Product Range
- Standard Aluminum Hopper Windows: Bottom-hinged tilt-in units. Designed for ventilation in basements, bathrooms, and utility rooms.
- Heat-Insulated Aluminum Hopper Units: Equipped with thermal breaks and double glazing arrays for better insulation in temperate climates.
- Custom Size Hopper Frames: Custom framing to fit odd openings. Useful for renovation or mismatched sizing.
- OEM/ODM Private‑Label Systems: Bulk order service with your brand labels. Supports different finishes, hardware, and glazing options.
- Basic Security Hopper Windows: Optional reinforced frames and locks for low-security yet cost-effective installations.
Manufacturing Capabilities
- High Production Volume: Annual output up to 50,000 m² of hopper windows. Production focuses on large batch orders for export clients.
- Flexible OEM / ODM: Private-label manufacturing is supported. You can control brand name, sizes, hardware, and packaging.
- In-House Assembly: Cutting, welding, glazing, and finishing are done in their own plant. This offers direct control over product quality.
- Moderate Automation Use: The facility uses basic automated extrusion and welding machines. It gives consistent results but not ultra-high tech.
Research & Development (R&D)
Lagunas keeps R&D internal and lightweight. Their focus is on adapting to client needs rather than innovation. They adjust product specs based on feedback from export markets. They conduct structural and thermal testing to match buyer demands, but there are no public patents or labs. Their product updates come from project experience rather than formal design cycles.
Sustainability & Ethics
- ISO Certified Manufacturing: The company holds ISO 9001 and ISO 14001 certifications. Quality and environmental standards are followed.
- Material Traceability: Aluminum frames use sourced alloy with documented origin. It helps reduce supply chain risk and supports consistency.
- Low Packaging Waste: Export packaging is minimal and optimized. This helps reduce waste while protecting products in transit.
- Energy Moderation Practices: Basic energy-saving methods are used. Some lighting and heating systems run off timers to lower electricity use.
Takeaway Note
Lagunas is ideal if you need low-cost, bulk window systems with private‑label support for export or multi-unit villas. However, since they are a newer and mid‑sized firm, they may lack premium finish detail or global brand recognition.
Conclusion
Back when I was helping that villa owner choose hopper windows, we had no list like this. We compared, waited, and guessed. Now, you don’t have to.
This guide ties together reliable options from around the world, each suited for different project sizes, styles, and goals.
Whether you want a high-end profile or cost-friendly bulk supply, it’s all here. Read through each review again, match your needs, and move forward with confidence.
If Vallisco caught your eye, they’re ready to support your next build with direct factory service. Contact us today!
