Expert Home
Services You
Can Trust
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No hidden fees. No upsells. Just expert service.
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Proudly Serving the Tri-State and Kentuckiana
We provide expert HVAC service to homes and businesses throughout:
Improve Efficiency & Save Money
Keep your systems running smoothly and costs under control.
Why Choose A+ Derr?
Whether you’re dealing with a problem or planning ahead, get reliable heating, cooling, plumbing, and electrical solutions from A+ Derr—done right the first time.
Your Comfort, Backed by Experience and Integrity
Expert Technicians, Not Salespeople
NATE-certified pros inspect, clean, and optimize your system.
Avoid Emergency Repairs
Prevent mid-season breakdowns with proactive maintenance.
100% Satisfaction Guarantee
We stand behind every service we perform.
We Service and Install the Top Brands
Voted Best Heating & Cooling in Evansville
Here’s How Easy It Is to Stay Comfortable
Schedule
Your Service
Book online or call to choose a convenient time that works for you.
1
We Do
the Work
A certified pro arrives on time and ensures everything’s done right.
2
Experience
Total Comfort
Relax knowing your home systems are safe, efficient, and built to last.
3
OFFICE HOURS
FOLLOW US ON
ABOUT US
24/7 Emergency Assistance
877-936-2170
RESOURCE LINKS
We Care About Your Comfort Since 1975
OUR PREMIUM SERVICES
Heating
Keep your home warm all winter with trusted furnace repairs, installations, and seasonal tune-ups for every brand
Cooling
Beat the heat with expert AC service, system replacements, and maintenance plans that keep your unit running smoothly.
From water heaters and sump pumps to leaks and drains — our licensed plumbers handle every job with care and precision.
Plumbing
Electrical
Stay safe and powered up with professional wiring, lighting, panel upgrades, and whole-home electrical services.
Families throughout the Evansville and Louisville areas trust A+ Derr for honest service, fair pricing, and dependable results—whether it’s a repair, upgrade, or maintenance.
OUR ADVANTAGES
CUSTOMER REVIEWS
- I would recommend A+ Derr and their staff any day! Best service I have ever had! Go to them for your Heating and Cooling needs. You will not be disappointed.
- — Barbara C.
- Very good service. Knowledgeable HVAC experts always keeping us cool in the summer and warm all winter. This is a great team of professionals from start to finish.
- — Craig B.
- Very knowledgeable and courteous. Toured me through all the functions of the new unit. Completed work very neatly and respectfully. Would recommend to anyone.
- — Derek S.
See What Your Neighbors Are Saying
NEXT STEPS
LOCAL SERVICE AREA
License #: HM06269, HAC31423, M8194, , CE9013
© 2025 All Rights Reserved.
FINANCING AVAILABLE
Buy Today, Pay Over Time
Not all big purchases come at the right time for your budget. That's why we're happy to provide you with budget-friendly financing options that make the big purchases just a little easier. Call us at 855-522-1902, and we’ll happily answer them!
So What are you waiting for?
Google rating score: 4.9 of 5, based on 378 reviews
Don’t see your city listed? Give us a call at 833-232-4328 or contact us online to see if we serve your area.
Monday - Sunday
7AM - 6PM
A+ Derr delivers trusted repair, installation, and maintenance services with honest pricing and 24/7 service across Indiana, Kentucky, and Illinois.
More Ways to Save with A+ Derr
$2,026 OFF
Your New HVAC System
Cannot be combined with other offers. Restrictions Apply. See Dealer For Details.
Cannot be combined with other offers. Restrictions Apply. See Dealer For Details.
FREE
Water Heater
With Your New HVAC System
0% FINANCING
Cannot be combined with other offers. Restrictions Apply. See Dealer For Details.
For 60 Months
With Your New HVAC System
OUR AFFILIATIONS
TWO TOILETS. ONE PRICE.
Cannot be combined with other offers. Restrictions Apply. See Dealer For Details.
Buy One, Get One FREE
OUR DEALS
Trusted Since 1975
Same-Day Service
Licensed & Insured
24/7 Emergency Service Available
Special Offers Available - See Below
Service You Can Trust, Comfort You Can Feel