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50+ Years
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Emergency
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Trusted Commercial HVAC Services in Delaware
Service Unlimited has been delivering high-quality HVAC solutions to Delaware businesses for over 60 years. Our full-service approach combines dependability, problem-solving expertise, and a commitment to customer satisfaction. We specialize in commercial HVAC systems, offering comprehensive services from design and installation to preventative maintenance and emergency repairs. Our experienced technicians prioritize energy efficiency and system longevity, helping clients reduce operational costs while maintaining optimal indoor environments.

With a focus on innovation and client-centric solutions, we serve as a single-source provider for all HVAC needs, including climate control, ductwork, and building automation systems. Our dedication to quality craftsmanship and personalized service has established us as Delaware's preferred mechanical contracting company.
Services
HVAC Installation Preventative Maintenance Emergency Repairs Ductwork Services Building Automation Indoor Air Quality Water Treatment Climate Control Sheet Metal Fabrication Design-Build Solutions
Details
  • Year established: 1964
Highlights and features
  • 60+ years of commercial HVAC expertise in Delaware
  • Full-service solutions from design to emergency repairs
  • 24/7 emergency response for critical system failures
  • Energy-efficient systems that reduce long-term operational costs
  • Certified technicians with specialized industry knowledge
What people say
Great company Expert in their field Professional service Prompt and polite Outstanding employees
Services
HVAC Installation
Our HVAC installation services deliver complete climate control solutions for commercial properties. With over six decades of experience, we handle projects from initial design through final commissioning. Our technicians specialize in both new construction installations and system replacements, ensuring optimal performance and energy efficiency. We work with leading equipment manufacturers to provide durable, code-compliant installations that meet specific business requirements while maintaining budget constraints.
Preventative Maintenance
Our preventative maintenance programs help businesses avoid unexpected HVAC failures through regular system inspections and tune-ups. Our technicians identify wear patterns and potential issues before they cause downtime. This proactive approach extends equipment lifespan, improves energy efficiency, and maintains manufacturer warranties. We customize maintenance schedules based on system usage patterns and environmental factors specific to each commercial facility.
Emergency Repairs
We provide urgent HVAC repair services for critical system failures with rapid response times. Our on-call technicians carry common replacement parts to resolve issues quickly. This service minimizes business disruption by restoring climate control within hours rather than days. We prioritize repairs for essential operations while providing cost estimates before performing any work beyond basic emergency stabilization.
Indoor Air Quality
Our indoor air quality services improve workplace environments through advanced filtration systems and ventilation solutions. We conduct air quality assessments to identify contaminants and recommend appropriate purification technologies. This includes iWave air purifiers and customized ventilation strategies that meet ASHRAE standards. Our solutions help businesses maintain healthy air quality while improving HVAC system efficiency.
Building Automation
We implement building automation systems that optimize HVAC performance through programmable controls and occupancy sensors. These systems enable remote monitoring and adjustments through user-friendly interfaces. Our automation solutions reduce energy consumption by up to 25% while maintaining comfort levels. We integrate with existing HVAC infrastructure to provide scalable smart building capabilities for commercial clients.
Questions
What commercial HVAC services do you offer?
We provide complete HVAC solutions including installation, preventative maintenance, emergency repairs, ductwork, building automation systems, indoor air quality improvements, and energy-efficient design-build projects for commercial clients.
Do you offer emergency HVAC services?
Yes, we provide 24/7 emergency HVAC repair services to minimize downtime for businesses experiencing critical system failures, with rapid response times across Delaware.
How can preventative maintenance benefit my business?
Our preventative maintenance programs identify potential issues before they become major problems, extending equipment lifespan, improving energy efficiency, and reducing unexpected repair costs by up to 30%.
Are your technicians certified and experienced?
All our technicians have specialized HVAC certifications and receive ongoing training, with many team members having over 20 years of experience in commercial HVAC systems.
What areas do you service?
We primarily serve commercial clients throughout Delaware, with our main office located in New Castle, providing comprehensive HVAC services to businesses across the state.
Reviews (3)
Steve Bierman
Jul 23, 2021 Report
Let's pray to god this outfit learned from their previous & many failures. I wouldn't trust any of them in my home or place of work.
Bork Boi
May 01, 2021 Report
Critical: Quality Beware! Problem diagnosis cost depends on their untrained technician 's skill. Dignostic test ---Cost may run up to $900.00. Extremely rude supervisor. Service: A/C system repair
Michael Stiglitz
May 11, 2018 Report
Anytime I have had an issue with HVAC equipment, commercial or residential, I I have called them. And from the answering of the phone and dealing with great people like Rachel to the actual technicians that they send out like Troy and Bill, from start to finish they're very knowledgeable, accommodating and highly qualified people. But what I love the most about dealing with their company is every person that works there takes the time to explain to you about everything that you will be dealing with every step of the way.

I have asked too many questions too many times and they are always explained thoroughly and patiently. It's very easy to get lost in what the final bill will say because sometimes we focus on what the cost of a repair is. But with Brian Ryan and Ralph leading the team I never worried that the repairs will be done right. And I truly believe that they believe in doing it right the first time so it doesn't have to be repaired a second time. If you're looking for a great recommendation for company trust me these are the guys you want.