Starting our 4th decade in Austin.

When Doug McCullough founded the company in 1977, Austin was still a sleepy little college town. As Austin grew, so did the family-owned business, primarily through referrals. Over the years, we've expanded services from system installations to things unheard of back then … like weatherproofing, energy audits, duct renovations and energy rebates.

Al D’Andrea assumed the owner’s role upon Doug’s retirement in 2001. Since then, the company’s phenomenal growth led to the relocation into new and expanded facilities near Burnet Road and Anderson Lane in 2007.

Why Customers Choose McCullough?

Leading-Edge Expertise. Old-Time Service.

With four decades of experience, McCullough delivers unmatched expertise in the latest technologies to keep you comfortable. Delivered with the type of personal service not always found in today’s impersonal world. At McCullough:

Our Customers Come First.

We treat you as we wish to be treated. It’s a philosophy that works: we’ve grown our business through referrals and repeat business from satisfied customers.

We Shoot Straight.

We quote you a fair price, and do what we say we’ll do.

We Find Creative Solutions.

We find ways to save you money, get the most from your equipment, and improve your home's energy efficiency.

We're Here When You Need Us.

Our technicians are available Monday through Saturday 7 am to 7 pm. Emergency repairs are available 24 hours a day.

We Hire the Best.

Our team has decades of experience; it is rare to encounter a problem we've not solved somewhere else.

We Support the Community.

McCullough has been a leader in the local and state HVAC industry and has supported local schools and the HVAC industry with scholarships and donated systems and services.