24/7 Heating & Cooling | Kentucky & Indiana HVAC Company
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.
Next Day InstallNext Day Installs Available
A+ Derr Heating & Cooling Your Call For Comfort!​ Kentucky & Indiana's HVAC & Generator Experts
Special offer HIGHEST Energy Bill Reimbursement
With System Purchase
And No Payments Until 2025
See Dealer For Details!
Offer Expires 03/31/2024
Request Service

Request Service

Request Service

0% APR For Up To 12 Months

Same-Day Approval

Our Deals

Save On Our Services Today

HIGHEST Energy Bill Reimbursement

With System Purchase And No Payments Until 2025 Request Service Expires 03/31/2024
*See dealer for details

20% Off

Any Repair Up to $100 Request Service Expires 03/30/2024
*See dealer for details

$98

Furnace Tune-Up Request Service Expires 03/30/2024
*See dealer for details

$2,024 in Enhancements & Discounts

With Select System Purchase Request Service *With qualifying system purchase. See dealer for details.

$500 Off

Any Water Heater With Installation Next Day Install Eligible! Request Service Expires 03/30/2024
*Terms & conditions may apply.

$69

Safety Inspection + Free Smoke / C0 Detector Request Service Expires 03/30/2024
*Terms & Conditions May Apply.
With System Purchase And No Payments Until 2025

HIGHEST Energy Bill Reimbursement

Request Service Expires 03/31/2024
*See dealer for details
Any Repair Up to $100

20% Off

Request Service Expires 03/30/2024
*See dealer for details
Furnace Tune-Up

$98

Request Service Expires 03/30/2024
*See dealer for details
With Select System Purchase

$2,024 in Enhancements & Discounts

Request Service *With qualifying system purchase. See dealer for details.
Any Water Heater With Installation Next Day Install Eligible!

$500 Off

Request Service Expires 03/30/2024
*Terms & conditions may apply.
Safety Inspection + Free Smoke / C0 Detector

$69

Request Service Expires 03/30/2024
*Terms & Conditions May Apply.
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.

HVAC & Generator Services in Northern Kentucky & Southern Indiana

Serving the Area for Over 50 Years

When your AC or heating system doesn’t turn on, day or night, you need an expert team you can trust for prompt and exceptional services. That’s A+ Derr Heating & Cooling! Our highly trained and experienced technicians are ready to help restore your heating, cooling, and indoor air quality systems 24/7 so your home is fully functional again. With the A+ Derr team on your side, you can rest easy knowing you can get the home services you need when you need them. We are a fourth-generation family-owned company and work hard to provide our customers with the best HVAC services and solutions for their budgets. We have served Evansville, Louisville, and the surrounding areas for over 50 years.

Contact A+ Derr Heating & Cooling online today for any HVAC or IAQ services you need in Evansville, Louisville, or the surrounding area. Schedule an appointment online or call (833) 232-4328!

Heating Services for Your Home

At the height of the winter in Kentuckiana, you need your heating system to work correctly. Our team has the expertise to get your heating system back to work quickly so you and your family can be as comfortable as possible. We offer installation, replacement, repair, and maintenance services for various heating systems, including furnaces, heat pumps, and ductless mini-splits.

Our Cooling Services

A properly functioning cooling system is essential to be comfortable in your home during the summer heat. Whether your AC needs to be repaired on the hottest day of the year, you need routine maintenance, or you want to install a new system at your Kentuckiana home, you can trust our experienced technicians at A+ Derr to handle the job efficiently and effectively. We can service traditional air conditioning units, heat pumps, and ductless mini-splits.

Indoor Air Quality Services 

Your family’s health and sleep quality can be affected by contaminants and irritants from poor indoor air quality. However, installing indoor air quality systems, such as air cleaners or purifiers, can improve air quality, reducing these effects and providing clean air. A+ Derr offers indoor air quality services, including duct cleaning, ensuring your home’s air is safe for you and your family!

Call the A+ Derr team at (833) 232-4328 or contact us online for heating, cooling, or indoor air quality services in the Kentuckiana area today!

Generators in Evansville & Louisville

We understand the importance of uninterrupted power for your comfort and safety. Our seasoned will electricians carefully assess your power needs and recommend a Generac system that works best for your home. We prioritize your peace of mind by offering top-rated generator installation services that keep your lights on, appliances running, and security systems active. You can also count on us if it’s finally time to replace your existing whole-house generator.

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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.

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

Haley B.

Haley B.

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

Hal B.

Hal B.

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.

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

Beverly G.

Beverly G.

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Why Choose A+ Derr?

Your Call for Comfort!
  • Unparalleled customer service
  • 100% satisfaction guarantee
  • Locally owned & operated
  • Same-day & emergency services
  • Licensed & insured
  • Background-checked technicians
  • Military, veteran & senior discounts
  • No overtime charges

Proudly Serving

Kentuckiana & The Tri-State Region

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