Curb Adapters & Roof Curbs for Commercial HVAC Systems
The Leading Designer and Manufacturer of Rooftop Curbs and Curb Adapters
Curbco designs and manufactures custom curb adapters, roof curbs, and HVAC curb solutions for commercial rooftop units. Whether you’re replacing an outdated unit or installing new equipment, our products ensure a precise fit between your existing roof curb and your new HVAC system.
Curb Adapters
Curbco curb adapters connect new rooftop HVAC units to existing curbs with a precise fit that saves time and avoids costly rework. Built for durability and airflow efficiency, they make retrofits faster, smoother, and more reliable—every time.
Rooftop Curbs
Curbco rooftop curbs are built to match the exact specs of your HVAC unit, ensuring proper airflow and a secure, precise fit. We source dimensions directly from the manufacturer, so your curb arrives ready to install—saving you time, reducing risk, and helping your system perform at its best.
EasyCurb™ (Knockdown Curbs)
The EasyCurb™ by Curbco is a proprietarily designed knockdown curb that provides dependable structural support for rooftop AC units and other equipment. Designed to match any make or model, EasyCurb™ simplifies transport and assembly without sacrificing strength—making it the go-to solution for flexible, reliable installs.
Roof Equipment Rails
Curbco roof equipment rails deliver the strength and stability your HVAC system depends on. Built with 18-gauge galvanized steel, internal bracing, and continuous welded seams, our rails are engineered to support over 7,000 lbs—ensuring your equipment is as secure as it is efficient.
Metal Building Curbs
Curbco's metal building curb is a precision-built base that secures HVAC equipment to a metal roof, creating a stable, weather-tight connection that supports proper airflow and long-term performance.
Fan Curbs
Curbco fan curbs provide sturdy, reliable roof support for fans and ventilators across a variety of roof types—including flat, pitched, metal, or ridged, with or without insulation. Available in both canted and self-flashing designs, our fan curbs are built for a secure fit and long-lasting performance, no matter the installation.
What is a Curb Adapter?
A curb adapter creates a direct connection between your existing roof curb and a new rooftop HVAC unit (RTU). When equipment is replaced, dimensions, supply/return openings, and connection points rarely match.
Rather than modifying the roof or rebuilding the curb, a custom HVAC curb adapter bridges the gap — allowing you to install new equipment without disrupting the roof structure.
Curb adapters are commonly used in:
- RTU replacements and HVAC retrofits
- Upgrading discontinued or out-of-production units
- Matching new unit footprints to existing curb dimensions
- Minimizing downtime and avoiding roof penetration work
Built for Real-World HVAC Retrofit Conditions
Every Curbco roof curb adapter is engineered to match your exact application.
We design for:
- Existing curb dimensions and opening locations
- Supply and return air alignment
- Structural load requirements
- Drainage and weatherproofing
- Installation conditions in the field
This ensures your new HVAC unit integrates cleanly with your existing roof curb — without field modification or guesswork.
Standard Features of Our Curb Adapters
All Curbco curb adapters are built for durability, fit, and installation efficiency:
- Engineered for proper airflow and structural support
- Welded construction using corrosion-resistant materials
- Factory-installed insulation where required
- Designed for fast installation and reduced field labor
- Built to match existing curb and new unit specifications
- Labeled for easy identification and installation alignment
Optional Features & Custom Configurations
We offer fully custom curb adapter fabrication to meet project-specific requirements:
- Aluminum or galvanized steel construction
- Stainless steel options for corrosive environments
- Insulation upgrades for energy efficiency
- Custom transitions for complex HVAC layouts
- Accessories to simplify installation and long-term performance
When You Need a Curb Adapter
If you’re replacing or upgrading rooftop equipment, a roof curb adapter is often the most efficient solution.
You likely need a curb adapter if:
- Your new HVAC unit does not match your existing curb
- The original unit is discontinued
- You want to avoid cutting or rebuilding the roof curb
- Installation time and disruption need to be minimized
Curb adapters allow you to complete HVAC replacements faster, with less risk and lower total cost.
Why HVAC Professionals Choose Curbco
Curbco specializes in custom HVAC curb adapters and roof curbs for commercial applications. Our team works directly with distributors, contractors, engineers, and facility managers to ensure every adapter is built to specification and performs as expected in the field.
- Precise fit for each project
- Reduced installation time
- No field modification required
- Reliable performance in retrofit scenarios
SPEED MATTERS
When our customers asked for a faster, simpler way to place and manage orders—we built it.
KurbHub™ is Curbco’s easy-to-use online platform that puts everything at your fingertips: instant quotes, submittal drawings, real-time order tracking, and more. No waiting. No back-and-forth. Just the information you need, when you need it—so you can keep your projects moving.
Why Our Customers Keep Coming Back
HVAC RETROFIT EXPERTS SINCE 1983
Experience That Delivers
For over 40 years, Curbco has led the way in HVAC retrofit innovation—designing smart, dependable solutions that help contractors, distributors, and installers get the job done right the first time. When it comes to rooftop challenges, we’ve seen it all—and solved it all.
Principles That Guide Us
Our values are more than words—they shape how we serve every customer, every day. At Curbco, you’ll find integrity, care, and a commitment to excellence in every detail, because we believe doing the right thing is just part of who we are.
Request a Quote for a Custom Curb Adapter
Have project specs ready? Our team can design and quote your curb adapter or roof curb solution quickly.
Request a quote or submit your project details to get started.
Use this form or give us a call at 281-469-8855—you’ll get a quick, informative response from someone who knows their stuff.
Need an instant quote?
Visit KurbHub—our industry-leading platform for real-time pricing, ordering, and tracking. It’s the fastest way to get what you need, when you need it.
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