5-Star Reviews
Years of Local Service
Accredited Business
Technicians
and Operated
Why Northern Colorado Homeowners Choose McCormick
Homeowners across the region choose McCormick for one simple reason: straightforward, certified work backed by 20+ years of local experience. We give you honest recommendations and the right equipment for your home, and we stand by every job we complete.
Experience
Family-owned and operated, serving Northern Colorado for 20+ years (since 2004). We've installed and repaired thousands of systems across the Front Range, and that hands-on history shows up in every diagnosis and recommendation.
Expertise
NATE/EPA-certified technicians with real high-altitude, dry-climate HVAC know-how (Greeley sits at ~4,658 ft). We size and tune equipment for the conditions your home actually faces, not a generic average.
Trust
100% satisfaction guaranteed, with transparent pricing, equipment warranties, financing, and 1,030+ five-star local reviews behind every job. You'll know the cost and the plan before we start.
Northern Colorado homeowners have left McCormick more than 1,030 five-star reviews. From emergency furnace repairs to full AC replacements, our customers point to the same things repeatedly: honest pricing, clean and efficient work, and technicians who take the time to explain what they're doing and why. Read more on our reviews & testimonials page.
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Fast after-hours emergency HVAC service when your system can't wait.
Our HVAC Services in Greeley & Northern Colorado
Choosing an AC and HVAC company is about more than hiring someone to fix equipment. You are choosing who you trust inside your home, who will explain your options clearly, and who will help you decide what makes sense before you spend money.
AC repair, installation, and full-system replacement, including mini-splits, sized right for our dry, high-altitude climate so you stay cool through every Front Range summer.
Furnace, boiler, and heat pump repair, installation, and maintenance to keep you warm through every Colorado winter, from the first cold snap to the last spring freeze.
UV lights, whole-home humidifiers, and high-efficiency filtration that make your air cleaner, balance dry-climate humidity, and help your whole family breathe easier.
No heat or no AC? Our after-hours team responds fast when comfort can’t wait, so a sudden breakdown doesn’t leave your household uncomfortable.
Seasonal tune-ups that prevent breakdowns, protect your warranty, and extend the life of your equipment.
Flexible financing through trusted lenders like Synchrony, GreenSky, and Wisetack so a new high-efficiency system fits your budget. See your options on our financing page.
Heating & Cooling Projects Across Northern Colorado
Explore real furnace installations, AC replacements, heat pump upgrades, boiler services, and HVAC repairs completed by the McCormick team for homeowners throughout Greeley and the surrounding communities. Every project reflects our commitment to quality workmanship, dependable service, and long-lasting comfort.
Meet the Local HVAC Experts Behind McCormick
Our experienced HVAC technicians proudly serve homeowners throughout Greeley and Northern Colorado with honest recommendations, quality craftsmanship, and dependable service. Whether we're repairing a furnace, installing a new air conditioner, or replacing an entire HVAC system, we're committed to doing the job right and ensuring your home stays comfortable in every season.
HVAC Service Across Greeley & Northern Colorado
McCormick serves Northern Colorado and the Front Range, with our home base and office in 2881 S 31st Ave #3, Greeley, CO 80631, United States. Wherever you are in the region, our certified technicians bring the same quality installs, repairs, and maintenance to your door, and the same family-owned standards we've held since 2004.
We proudly serve homeowners in HVAC in Greeley, CO, Fort Collins, HVAC in Loveland, Windsor, Longmont, and Platteville, plus the surrounding Front Range communities. For the full coverage map and to confirm we reach your neighborhood, visit our service areas page.
HVAC FAQs — McCormick Heating & Cooling
Get Your Free HVAC Estimate
Ready for reliable comfort? Our NATE/EPA-certified team is standing by to help with AC, heating, air quality, and full-system replacements across Northern Colorado, backed by our satisfaction guarantee and a free, no-pressure estimate. Tell us what your home needs, and we'll give you a straightforward plan and an honest price.
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