24/7 Emergency Service

HVAC emergencies happen when you least expect them. Contact the professionals at A+ Derr to take care of your issue. We have the necessary skills and tools to fix your system so you can safely use it once again. Call our team at 833-232-4328 to get emergency HVAC services in Louisville, KY, Evansville, IN, or the surrounding areas.

Call Today 833-232-4328 Schedule Online
FREE ESTIMATE Schedule Today! Deals & Promotions

Professional Light Commercial Services in Louisville & Evansville

Operating a small business is already a juggling act; managing staff, staying on top of schedules, serving customers, and handling the day-to-day chaos. The last thing you need is for your HVAC system to go down or your electrical panel to fail in the middle of it all. That’s where A+ Derr Heating, Cooling, Plumbing, & Electrical comes in. Our light commercial services are designed specifically for hardworking business owners like you who don’t have time to wait around for slow repairs or vague estimates.

We understand that when something breaks, it affects more than just the temperature or the lights—it affects your team’s productivity, your customers’ experience, and your ability to stay focused on running your business. That’s why we approach every commercial service call with urgency and care. Whether it’s a boutique, café, clinic, or church, call A+ Derr at 833-232-4328 or contact us online.

Electrical Repair in Lexington

What We Service

Commercial systems are more complex than residential ones and require a technician who knows the difference. Our team is fully trained in a wide variety of commercial-grade systems and solutions, including:

  • Commercial HVAC systems – We service and install rooftop units, split systems, ductless mini-splits, and packaged systems to keep your employees and customers comfortable year-round.
  • Electrical panels and circuits – We handle panel upgrades, circuit troubleshooting, outlet installation, and more to keep your space safe and functional.
  • Interior and exterior lighting – From overhead lighting retrofits to motion sensor security lighting, we help ensure your business is properly illuminated.
  • Smart thermostats and zoning controls – Get better temperature control across office zones or open spaces with programmable commercial thermostats.
  • Generators and backup systems – Don’t let power outages bring operations to a halt. We inspect, install, and service standby generators to keep your business online.
  • Light plumbing – We also handle basic plumbing tied to HVAC equipment and water heater installations where necessary.

Who We Help

We work with a variety of small to midsize businesses and organizations throughout Indiana. If you manage any of the following, we can help:

  • Offices and administrative buildings: Ensure your team stays comfortable and productive with consistent climate control and reliable electrical support.
  • Retail stores and boutiques: Avoid customer discomfort and lost sales from HVAC or lighting issues.
  • Restaurants and cafés: Maintain proper ventilation, heating, and cooling for both kitchen and dining areas.
  • Small medical and dental clinics: Keep your patients and staff safe and comfortable while meeting industry standards for airflow and reliability.
  • Churches and community centers: Let your members gather in comfort with well-maintained systems that can handle larger crowds.

Services We Offer

We tailor our services to meet the needs of business owners and property managers who can’t afford surprises or extended downtime.

System Diagnostics and Repairs

From a rooftop unit that stops cooling in the middle of summer to flickering lights or outlets that no longer work, our team gets to the root of the issue fast. We troubleshoot a wide range of HVAC and electrical problems and provide honest, effective repair solutions to get your business back on track quickly.

Preventive Maintenance Plans

Commercial systems work hard—and that means they need regular attention. Our light commercial maintenance programs are designed to catch small problems before they become major breakdowns. We’ll schedule regular inspections, filter changes, coil cleanings, and more so your equipment keeps performing at its best. You’ll also benefit from fewer emergency calls, lower utility bills, and longer equipment life.

New Equipment Installation

Need to upgrade an aging HVAC system? Expanding into a larger space? We help businesses choose and install high-efficiency systems that meet both their performance needs and energy budgets. We also install commercial-grade thermostats, updated lighting, and new circuit runs for specialty equipment.

Code Compliance and Safety Upgrades

Electrical and HVAC codes change—and keeping up can be confusing. We’ll make sure your systems are safe, compliant, and up to code, especially during renovations or when preparing for inspections.

Emergency Service

If something breaks down after hours or during a critical moment, we’re ready to respond. We offer responsive, priority service for commercial clients experiencing HVAC or electrical failures that affect business operations.

What Makes Us Different

We’re more than a commercial contractor—we’re a true partner invested in the success of your business. At A+ Derr, we don’t just fix systems—we make sure your space stays productive, safe, and ready to meet the demands of each day. When you choose us, you gain a team that understands the fast-paced nature of running a business and shows up with solutions that make your job easier. Here’s what you can count on:

  • Licensed and Insured Technicians: All of our service techs are certified and trained to work on commercial-grade systems.
  • Flexible Scheduling: We work around your business hours to minimize disruption and downtime.
  • Upfront Pricing: We provide honest estimates and clear explanations with no hidden surprises.
  • Experience with Indiana Businesses: We live and work here, and we know how to support other local businesses.
  • Long-Term Support: We don’t just show up for one job—we’re here to build long-term relationships based on trust and reliability.

Commercial Maintenance Plans: Peace of Mind All Year

Our scheduled maintenance packages are built with business in mind. You’ll get seasonal tune-ups, priority scheduling, and detailed reports that help you plan ahead for repairs or upgrades. This is a great option for property managers and business owners who want consistency and cost control.

Benefits include:

  • Extended equipment lifespan
  • Fewer unexpected breakdowns
  • Improved energy efficiency
  • Better indoor air quality
  • Predictable service costs

Schedule Your Commercial Service Today

You work hard to keep your business moving. We’re here to make sure your electrical and HVAC systems do the same. From regular maintenance to emergency repairs or full system installations, A+ Derr Heating, Cooling, Plumbing, & Electrical is the commercial partner you can rely on.

Call 833-232-4328 today or contact us online to learn more about our light commercial services or to schedule a service call.

 

Start Saving Today With

Membership Perks

Start Saving Today With

Membership Perks

What To Expect

Discover The A+ Derr Difference

24/7 Heating & Cooling Repairs

Heating and cooling emergencies can happen on nights, weekends, and holidays, so you can trust us to be there no matter when you need us.

Licensed & Experienced Technicians

Our experts have the expertise and training to deliver the highest quality services every time.

100% Satisfaction Guarantee

Our team is dedicated to ensuring your 100% satisfaction with every HVAC service we perform.

Servicing All Major Makes & Models Of Equipment

We are a Lennox Premier Dealer and also service on all makes and models of equipment, including Goodman, Amana, Carrier, Trane, Rheem & more!

Locally Owned & Operated

Since we’re based in Kentuckiana, we know the needs of Evansville, Louisville, and surrounding communities.

50+ Years in Business

For over 50 years, A+ Derr has provided high-quality service, products, and results for Kentuckiana's residents.

24/7 Heating & Cooling Repairs

Heating and cooling emergencies can happen on nights, weekends, and holidays, so you can trust us to be there no matter when you need us.

Licensed & Experienced Technicians

Our experts have the expertise and training to deliver the highest quality services every time.

100% Satisfaction Guarantee

Our team is dedicated to ensuring your 100% satisfaction with every HVAC service we perform.

Servicing All Major Makes & Models Of Equipment

We are a Lennox Premier Dealer and also service on all makes and models of equipment, including Goodman, Amana, Carrier, Trane, Rheem & more!

Locally Owned & Operated

Since we’re based in Kentuckiana, we know the needs of Evansville, Louisville, and surrounding communities.

50+ Years in Business

For over 50 years, A+ Derr has provided high-quality service, products, and results for Kentuckiana's residents.

Review Image
Our Reviews

See What Your Neighbors Are Saying

Jake came and did my spring service yesterday. Their service is very professional, they are always out to get the best deals for anything I may need. I purchased new units from them a couple years ago, and the savings has been so noticeable.

Amanda A.

Amanda A.

Texal and his crew came out on time. Had 2 new systems put in. The service was great. Highly recommend.

Beverly G.

Beverly G.

Nicholas has always been so polite and professional. We feel very comfortable having him in our home and know that his inspections are thorough.

Vicki L.

Vicki L.

Awesome service. They make it easy and painless to keep our new HVAC up and running at top efficiency!

Hal B.

Hal B.

Dylan came today for our tune up and as usual, we are very pleased with our service.

Haley B.

Haley B.