Custom HVAC Enclosures And Cabinets
At Durex Inc., we specialize in manufacturing high-performance HVAC enclosures designed to protect sensitive equipment from dust, debris, and extreme weather. Whether installed indoors or exposed to harsh outdoor applications, our enclosures help ensure your HVAC systems operate efficiently and last longer.
Custom enclosures offer a clear advantage over off-the-shelf alternatives. They’re built to your specifications — including dimensions, access points, and material needs — which means a better fit, better airflow, and fewer maintenance headaches down the line.
From metal cabinets for rooftop units to NEMA-rated housings for electrical components, we provide purpose-built solutions trusted by HVAC contractors, engineers, and OEMs across New Jersey and beyond. When performance, protection, and durability matter, we’re ready to build it right.
Why Choose Our Custom HVAC Enclosures
At DureX, we don’t build one-size-fits-all enclosures — we build exactly what your project demands. With decades of experience serving contractors, engineers, and manufacturers throughout New Jersey and the East Coast, our team delivers made-to-order HVAC cabinets and electrical enclosures that meet the highest standards in the industry.
Our enclosures possess the ability to endure various environmental conditions and are designed for tailored applications, ensuring compliance and flexibility.
Here’s why professionals trust DureX for custom metal enclosures:
Built to Spec: Every enclosure is designed to match your exact HVAC or electrical requirements — no retrofitting or guesswork.
Material Options: Choose from powder-coated steel, aluminum, stainless steel, or mixed metals to suit the environment and application.
Fully Customizable: Add louvers, filters, conduit cutouts, lockable access doors, or company branding — all engineered in.
NEMA & UL Compliance: We build to meet or exceed relevant NEMA enclosure ratings and UL standards.
Fast Turnaround: Our Union County-based facility offers fast lead times and expedited production to keep your project moving.
Whether you’re housing a rooftop HVAC system in Edison or protecting a ductless unit on-site in Plainfield, our enclosures are built to perform and built to last.
Benefits of Our Solutions
Our custom enclosures offer a wide range of benefits, including enhanced protection from airborne contaminants, improved performance, and increased durability. By choosing our custom enclosures, you can ensure that your equipment is safeguarded against harsh environmental conditions, reducing the risk of damage and prolonging its lifespan.
Additionally, our enclosures are designed to provide easy access and maintenance, making it simpler to install, modify, or replace components as needed. With our custom enclosures, you can enjoy improved indoor air quality, reduced energy consumption, and increased overall efficiency. Our solutions are perfect for customers who need a reliable and high-quality enclosure that meets their specific needs and specifications.
HVAC Cabinet & Enclosure Solutions
We offer a full range of HVAC enclosures and metal cabinets designed for performance in both indoor and outdoor environments. From protecting heat pumps in suburban backyards to safeguarding electrical components on commercial rooftops, our enclosures are built for real-world conditions and tailored to the demands of each job.
Our enclosures are also suitable for outdoor applications, ensuring reliability and safety in challenging conditions, including environments with potential explosive hazards.
Our product line includes:
Custom HVAC Cabinets – Perfect for air handlers, mini-splits, and rooftop units. Available in weather-resistant steel or aluminum with access panels and built-in ventilation.
Electrical Enclosures – Ideal for mechanical rooms, control panels, and field wiring applications. Designed to meet your electrical load, cooling, and space requirements.
Specialized Enclosures – Need something tamper-resistant, insulated, or corrosion-resistant? We’ve got you covered.
Each unit is engineered for strength, ventilation, and service access. Whether you’re managing a commercial HVAC install in Elizabeth or retrofitting a unit in South Plainfield, we offer enclosure solutions that fit — and perform — better than stock options.
Customization Options
At DureX, customization isn’t an add-on — it’s the foundation of everything we build. Our enclosures are designed from the ground up to match the exact specifications of your HVAC or electrical project, ensuring a perfect fit and optimized performance.
Here’s what you can customize:
Dimensions & Build – Exact sizing for any HVAC or electrical component, including low-clearance and tight-access installs.
Access & Mounting – Cutouts, louvers, hinged doors, and mounting holes configured to your equipment layout, including customizable door designs for specific needs.
Material Options – Choose from steel, aluminum, stainless steel, or hybrid builds, depending on your environmental and strength requirements.
Thermal Control – Add insulation, weather stripping, and filter access to improve energy efficiency and protect sensitive components.
Finish & Branding – Powder coating in custom colors, silk-screening, or anodized finishes — plus logo placement for OEM applications.
Hardware Choices – Select from a wide range of locks, latches, hinges, and fasteners for security and serviceability.
From Edison warehouses to Westfield commercial properties, our NJ-based team works with you every step of the way to ensure your enclosure is ready to install, right out of the crate.
The DureX Enclosure Manufacturing Process
We take pride in a process that’s as precise and reliable as the enclosures we build. From concept to completion, every step is handled in-house at our 120,000 sq. ft. New Jersey facility — giving you tighter quality control, faster turnaround, and full transparency.
Here’s how your enclosure goes from idea to install:
Project Assessment We begin with a detailed review of your HVAC or electrical equipment needs, including site conditions, size constraints, airflow requirements, and NEMA compliance goals.
Design & Engineering Our engineering team prepares approval drawings in PDF and 3D formats. You’ll review and sign off before anything is fabricated. Modifications may be required for optimal integration and performance, whether it involves ductwork for HVAC installations or adapting electronic enclosures to fit specific customer needs.
Precision Fabrication Using advanced CNC machinery, metal stamping, laser cutting, and automated welding, we fabricate each component with tight tolerances and repeatable accuracy.
Finishing & Branding Enclosures are finished per your spec — powder coating, silk screening, anodizing, or polishing — all done in-house to ensure quality and consistency.
Inspection & Quality Control Every enclosure undergoes in-process and final inspection to ensure compliance with your drawings and performance standards.
Packaging & Delivery Units are securely packaged and shipped with installation-ready components. We offer custom crating and expedited shipping across NJ, the East Coast, and nationwide.
Whether you’re on a tight schedule in Bergen County or planning a long-term build in Union, DureX is built to deliver — every time.
Materials and Construction for a Custom Enclosure
We use a variety of high-quality materials to construct our custom enclosures, including steel, metal, and NEMA-rated polycarbonate. Our enclosures are built to last, with a focus on durability and performance. We offer a range of sizes and configurations to meet the diverse needs of our clients, from small, compact enclosures to large, complex systems.
Our custom enclosures are designed to provide superior protection and performance, making them an ideal choice for applications where reliability and efficiency are crucial. Whether you need a custom enclosure for your HVAC system, electrical equipment, or other applications, we have the expertise and resources to provide you with a high-quality solution that meets your specific requirements.
NEMA Enclosure Ratings Explained
Choosing the right enclosure means more than just matching size — it’s about ensuring your equipment is protected from the elements, contaminants, and environmental hazards. That’s where NEMA enclosure ratings come in.
Our enclosures are listed by independent testing organizations like C-UL and UL, ensuring compliance with safety and quality standards.
At DureX, we manufacture custom HVAC and electrical enclosures that meet a full range of NEMA standards, including:
NEMA 1 – General indoor use; protects against dust and light contact
NEMA 3R – Ideal for outdoor HVAC units; protects against rain, sleet, and ice
NEMA 4 & 4X – Watertight enclosures for washdown areas and corrosive environments
NEMA 12 – Sealed against dust, oil, and non-corrosive liquids for industrial interiors
Not sure which rating fits your application? Our engineers can help you assess your jobsite conditions — from rooftop installs in Newark to basement mechanical rooms in Bridgewater — and recommend the ideal protection level.
We don’t just meet code — we help you stay ahead of it. Every DureX enclosure is built with long-term durability and compliance in mind.
Air Conditioning & Electrical Considerations
Custom enclosures must do more than just protect — they need to support the performance of the HVAC and electrical systems they house. At DureX, we engineer each enclosure with real-world use in mind, including ventilation, access, and system integration.
Here’s how we support your critical systems:
Integrated Cooling Solutions – For enclosures that generate or trap heat, we can design air conditioning or fan setups to maintain stable internal temperatures and reduce component stress. Integrating media cabinets can also enhance the efficiency of heating and cooling systems, leading to improved air filtration and potential energy savings.
Dehumidification Options – Essential for systems in humid environments or where condensation is a concern, especially in outdoor installations.
Electrical Access & Mounting – Pre-cut conduit entries, wiring trays, mounting brackets, and back panels make installation faster and safer.
Serviceability First – Access doors, removable panels, and thoughtful layout ensure your techs can reach filters, fuses, and controllers without disassembly.
Whether you’re protecting a rooftop AC unit in Jersey City or need a sealed electrical enclosure in a manufacturing facility in Linden, we help you maintain performance, improve safety, and reduce downtime — right from the enclosure.
Industries & Applications
DureX enclosures are trusted across industries where protection, performance, and precision matter. Whether you’re managing HVAC installs, electrical systems, or custom mechanical builds, our enclosures are built to support the environments you work in — and the systems your customers rely on.
Our products are designed with quality and customization in mind, ensuring they meet industry standards while providing options that cater to varying design and building specifications.
Who We Serve:
HVAC Contractors – From residential mini-splits to large-scale rooftop units, we deliver field-ready enclosures that save time and improve performance.
OEMs & Equipment Manufacturers – Need branded, scalable solutions? We produce high-volume runs with consistent quality and finish — including silk-screened logos and color-matched powder coat. Our system ensures that all orders are pending approval, allowing for a thorough review and confirmation of transactions before finalization.
Facility & Building Managers – From schools and office buildings to warehouses and manufacturing plants, our enclosures support indoor air quality, system protection, and easy maintenance.
Where Our Enclosures Go to Work:
Rooftop HVAC units across Newark, Edison, and Elizabeth
Indoor electrical panels in South Plainfield, Union, and New Brunswick
Custom applications in multifamily buildings, hospitals, industrial facilities, and municipal infrastructure. HVAC media cabinets are professionally installed to ensure compatibility with existing systems, securely mounted, and properly connected to enhance air quality and overall system performance.
When the job calls for a durable, custom-built enclosure that stands up to real conditions, we’re the team that delivers.
Quality and Certification
At DureX, we are committed to delivering high-quality custom enclosures that meet the highest standards of performance and reliability. Our enclosures are designed and built to meet or exceed industry standards, including NEMA enclosure ratings and UL listings. We use only the highest-quality materials and components, and our manufacturing processes are designed to ensure consistency and accuracy.
Our custom enclosures are subjected to rigorous testing and inspection to ensure that they meet our high standards of quality and performance. With our commitment to quality and certification, you can trust that our custom enclosures will provide you with the reliability and efficiency you need to succeed. Our customers can browse our selection of enclosures online or contact us to learn more about our custom enclosure solutions and how they can improve their equipment’s performance and protection.
Frequently Asked Questions
What’s the typical lead time for a custom HVAC enclosure?
Most projects are completed in 2–4 weeks, depending on complexity and volume. Expedited options are available for urgent timelines.
Do your enclosures meet NEMA and UL standards?
Yes. We manufacture enclosures to meet a wide range of NEMA ratings and can support UL listing requirements where needed.
Can I request a custom design or drawing before production?
Absolutely. We provide PDF and 3D approval drawings before fabrication to ensure every detail aligns with your specifications.
What materials can I choose from?
Common materials include steel, stainless steel, and aluminum. We’ll help you choose based on durability, corrosion resistance, and aesthetics.
Do you offer nationwide shipping?
Yes — we ship our enclosures across New Jersey, the East Coast, and nationwide. Local delivery is available for job sites in Union, Middlesex, and surrounding counties.
What are my customization options?
You can customize size, access panels, cooling, color, branding, hardware, and internal components. If it’s part of the enclosure, we can build it your way. Regular filter replacement and ensuring components can be easily replaced are crucial for maintaining optimal performance.
Request a Custom HVAC Enclosure – Built to Fit, Built to Last
Ready to take control of your HVAC project with an enclosure that’s actually built for it?
At DureX, we combine decades of precision metal fabrication with responsive engineering and real-world HVAC experience. Whether you need a single weatherproof cabinet or a full run of NEMA-rated enclosures, we’ll deliver a solution that meets your specs, your timeline, and your expectations.
Our enclosures offer the advantage of being designed to address unique installations and challenges in industrial settings, providing specific benefits that optimize performance in tight spaces or specialized environments.
Proudly made in New Jersey. Shipped anywhere you need it.
View the options and features available for electronic enclosures on our website.
