Delaware’s Top Commercial HVAC Service

Discover Why SUI is Delaware’s Preferred Mechanical Contracting Company

Preventative Maintenance

Service Unlimited takes pride in our ability to extend the lifespan of your HVAC systems. We offer preventative maintenance services to identify potential issues and fix them before they become significant problems for you. Our skilled technicians have years of experience working with local Delaware businesses to diagnose and resolve HVAC issues. Fixing these problems allows us to create an efficient HVAC system, saving you from unnecessary energy costs while prolonging your unit’s longevity.

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Service

The dependability of your HVAC systems directly relates to your operational efficiency. HVAC issues are inevitable, but by partnering with the right provider, you can significantly reduce the impacts of system downtime—keeping your productivity high. At Service Unlimited, our top priority is your satisfaction. Discover why businesses in Delaware trust SUI for their HVAC service needs.

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Installation

Service Unlimited has been in the Delaware area for over 60 years, enabling us to be your single-source HVAC provider. From turnkey design and engineering, to retrofitting and design-build, our technicians have the knowledge and expertise to handle any installation project. Whether they need a system designed from scratch or direct replacement units, local businesses partner with SUI because they know we’ll deliver a high-quality job.

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Indoor Air Quality

Covid-19 highlighted the importance of indoor air quality (IAQ) in the workplace. We care about the health and success of our partners, which is why SUI delivers air-quality solutions to ensure your HVAC system produces clean, comfortable air into your workplace. Discover the difference that comes with over six decades of experience.

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Your Full-Service HVAC Provider

Why deal with the hassle of working with different contractors if you don’t have to?

Service Unlimited is your one-stop shop for everything HVAC. Our full-service HVAC services deliver a comprehensive solution for any need you have, such as:

Design-Install

For businesses looking for a holistic solution, SUI offers design-build services handling your entire HVAC project. Our expert designers evaluate your project goals with your building capabilities and custom tailor an HVAC system that works for you. Once designed, our technicians install, inspect, and commission your system. By streamlining your entire project, we alleviate communication mix ups that occur when juggling between multiple companies.

Indoor Air Quality

Supplying clean air into your facility is crucial to creating a healthy workplace. SUI offers a wide range of IAQ services, from in-house air quality balancing to system design, build, and installation. By maintaining efficient systems, we protect you and your employees from the dangers of impure air.

Emergency Response

Time is money, and downtime in any aspect of your operations can affect productivity. Your HVAC unit is no exception, and sometimes it’ll break down. In these circumstances, you want a provider who can promptly deliver service. SUI offers emergency HVAC services to resolve your breakdowns and get you up and running as quickly as possible.

Ductwork

Ductwork ventilates your entire building and, depending on the quality, can either make or break your HVAC efficiency.

SUI specializes in several ductwork services, including:

Design
Fabrication
Installation
Air Balancing

Our high-quality solutions supply your building with well-ventilated air, creating a comfortable and clean workspace.

Building Automation Systems

Our commitment to providing service that exceeds expectations is seen in our climate control services, as we integrate industry-leading developments in building controls, offering:

Automated temperature control
Building occupancy adjustments
Energy-efficient operations
Programmable custom controls
User-friendly interfaces

For businesses looking to automate their building management, Service Unlimited offers BAS systems to give you complete control over your daily operations.

Maintenance

Let’s face it, investing in a brand new HVAC system is expensive. SUI isn’t in this industry to make a quick buck. We care about our clients and the work we do. That’s why we offer preventative maintenance services to extend your system’s lifespan, ensuring it runs smoothly.

When you partner with us, our technicians regularly inspect your units for any potential problems, fixing them to help you avoid costly repairs down the road. Take the proper precautions now to set your system up for success down the road.

About Us

At Service Unlimited, delivering high-quality work is the obvious expectation. We’ve spent over 60 years serving Delaware businesses. Our sustained success is based on our core values of being dependable, being driven to solve problems, and being dedicated to providing a positive experience.. SUI’s full-service solutions are focused on assessing your personal needs and delivering a custom-tailored product that exceeds your expectations.

Why Service Unlimited?

Read Our Blog

Take a look at SUI’s blogs to stay up-to-date with industry tips and developing trends.

How to Prepare a Maintenance Budget

Why Are HVAC Maintenance Agreements Important?

How to Troubleshoot Common HVAC Problems

Preparing for Fall: Your HVAC Maintenance Checklist

The Basics of HVAC Equipment: What You Need To Know

Creating Energy-Efficient HVAC Systems

VRF Vs Split-System HVAC Solutions: What’s the Difference?

5 Key Benefits of HVAC Preventative Maintenance

What Are the Components of a Commercial HVAC System?

Testimonials

“SUI presented the “sad” facts clearly and also took additional steps to make sure our needs were met. They were considerate, thoughtful, and professional.”

Mike S.

“Josh W. was really helpful with our issue and went out of his way to explain everything to us.”

Nick K.

“If you’re looking for a great recommendation for a company, trust me these are the guys you want.”

Michael S.

“Great company! The service was done right the first time, and I could tell the person was an expert in their field.”

Dave C.

“Thanks Ralph! Your team did a fantastic job getting the installation completed in time for school. We received our temporary certificate of occupancy last Friday. Your hard work and dedication does not go unnoticed. Again, great job!”

Jon S.

“Troy was leaving as I pulled up, he got out of his truck and explained everything to me. He got my AC up and running and let me know it would get me through a season or two so I still have time to budget for a new AC. What a great experience! Thank you!”

Marc C.

“Hector performed a much needed service call on my establishment’s oil boiler. Hector was extremely thorough and professional in all work that was performed. Perfect example of quality and all around craftsmanship.”

Matt S.

“Complete confidence in SUI and the work they do. They are efficient and resourceful; they collaborate with each other if one is ‘stumped’ or finds something irregular; they work quickly to restore service but not so quickly so they miss something.”

Kevin C.

I was moved by the professionalism, hardwork, and respectfulness of Alex and Joe and want to make sure the bosses know what great workers they have. I can’t say enough about how they were respectful of myself and my home and how hard they worked. SUI has outstanding employees!

Diane S.

“I very much appreciate the entire team of Service Unlimited people who worked on the project. The two guys who did most of the work were prompt, polite, capable, efficient and knowledgeable. Even the programming of the Honeywell apps was done quickly, and I know from experience that app is not easy get right without calls to Honeywell tech service to discover all the tricks they don’t put in the install manual. The team also made many improvements to bring the installation up to code and up to modern technology and best practices. Thanks for everyone for a nice job.”

Michael L.

Our Partners

Service Unlimited takes pride in our vendor relationships. We’re certified for the most efficient brands on the market—delivering quality, reliable equipment that lasts for decades.