Trusted Heating & Cooling Services in Round Rock, TX Since 1977

100% Satisfaction Guaranteed
STILL Locally Owned and Operated
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512-280-0011
financing for 72 Months with approved credit

Our Services

Heating

We offer heating services that keep your home warm and energy-efficient all winter long. Our team provides reliable solutions that ensure your system works smoothly. You can trust us to take care of all your heating needs with friendly, professional service.

Air Conditioning

When it comes to cooling your home, McCullough Heating & Air Conditioning has you covered. Our experienced technicians are ready to handle all your cooling needs, keeping your home comfortable and energy-efficient even during the hottest months.

Home Energy Audits

For detailed home energy audits, rely on the experts at McCullough Heating & Air Conditioning. We’ll evaluate your home’s energy use, pinpoint areas to improve, and offer solutions to boost comfort while lowering your energy bills.

Financing options available

We Live Here, We Give Here! Special financing for up to 6 years. Subject to credit approval.
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Experience the McCullough Difference

More Than a Service Call—Comfort You Can Count On
  • Trusted Service Since 1977
  • Expert Installation & Quality Repairs
  • Flexible Financing & Satisfaction Guarantee
  • Reliable, Local, Transparent Service
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Don’t Miss Today’s Offers

FREE Service call with Repair
No Hidden Fees.
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Expires: 12/31/2025

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Quality Service Recognition by Leading Organizations

Proudly Serving Round Rock and the Surrounding Areas

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Join our maintenance plan

Ensure Your Equipment is running smoothly Year-Round
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WHAT YOUR NEIGHBORS ARE SAYING ABOUT US

2 days ago
Cece Bullard-Berent
Have called these folks now for work on our AC and our heater. Both went great. This most recent time, our technician Clayton was super helpful. He helped debug and replace our heater blower very quickly and was cheerful and willing to explain everything as he went through it. We got top level service and prices were very reasonable.
2 days ago
Dara Mak
Guillermo was prompt and communicated what was observed about the system inspection well. Very pleasant customer experience
2 days ago
Carole Barasch
James Sanchez was excellent. He was courteous, knowledgeable and helpful. My heating system is now ready for winter and I have James and McCullough’s to thank for that.
2 days ago
Mike Perry
Very good service and answered all my questions. We will continue to use McCullough for all our heating and AC repairs
2 days ago
Beverly Shaw
Excellent service. Eric was timely, courteous and informative
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