NATE - Certified

Heating & Air Conditioning in Fort Lupton, CO — Permitted by the City, Not Weld County

McCormick Heating & Cooling sends NATE- and EPA-certified technicians into Fort Lupton homes every week. Work covers the older blocks of Lupton Village and Fulton Village to the newer filings at Vista Meadows, Lancaster Crossing, and Sweetgrass Meadows. 

At 4,914 feet, Fort Lupton's heating season runs to roughly 6,113 heating degree days a year (NOAA weather station, Brighton 3 SE, 9.8 miles south). That is a serious workload for any furnace, and it lands hardest on this city's housing stock, which is the oldest anywhere we serve.

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What HVAC Services Does McCormick Provide in Fort Lupton?

McCormick provides residential heating services throughout Fort Lupton, including furnace repair, furnace installation and replacement, and furnace tune-up and maintenance, plus emergency furnace repair when a January failure can't wait for business hours.

On the cooling side, we repair, replace, and maintain central air conditioning systems across the city, where summer highs push past 90°F. Homes draw their power from United Power, the member-owned electric cooperative headquartered in nearby Brighton rather than an investor-owned utility.

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Why Do Fort Lupton's Older Homes Need Different Heating Work?

Fort Lupton's median home was built in 1980. Nearly half of the city's homes (49.8%) predate 1980, a full 12.5% were built in 1939 or earlier, and only 9.5% date from 2010 or later. In practical terms, that changes what a furnace visit looks like.

Furnaces in homes this age have worked through decades of long, hard winters, and that wear shows up in ways newer neighborhoods just haven't seen yet. The most serious is a cracked heat exchanger, the part that keeps combustion fumes separated from the air blowing into your home. It's one of the main reasons an older furnace gets replaced rather than repaired.

Older homes also have a hidden venting issue that newer ones don't. Many were built with a single chimney flue shared by the furnace and the water heater. When the furnace gets upgraded to a modern high-efficiency model, it vents out the side of the house instead, and the water heater is left using a chimney that's now too big for it alone. The exhaust rises too slowly, moisture builds up inside the chimney, and fumes can even drift back into the house instead of going up and out.

In Lupton Village and Fulton Village, the older core of the city, we check for exactly this on every furnace replacement. It's a conversation a Fort Lupton homeowner needs to have that the owner of a 2015-built house simply doesn't.

Who Permits a Furnace Replacement in Fort Lupton?

The City of Fort Lupton Building Department. Not Weld County. Weld County only issues building permits for unincorporated areas. Inside city limits, jurisdiction belongs to the City, which issues its own over-the-counter furnace replacement/repair permit. It's an easy detail to miss for a contractor who doesn't regularly work in Fort Lupton, and the consequences fall on the homeowner. Assuming county jurisdiction either delays your project while the paperwork gets rerouted, or worse, the permit gets skipped entirely. An unpermitted furnace replacement is a problem that surfaces at inspection, at an insurance claim, or at resale, long after the contractor is gone.

Fort Lupton enforces the full 2024 I-code family, including the International Mechanical Code and International Fuel Gas Code. When McCormick replaces a furnace in Fort Lupton, the permit goes through the City Building Department and the installation is built to the code edition the City's own inspectors will check it against.

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I submitted a claim through First American Home warranty and they assigned McCormick to take a look at my fire alarm. They called as soon as they opened and set up an appointment with Jake Hernandez to come out today! He was quick to diagnose problem and replaced the malfunctioning alarm. Thank you Jake for your exceptional service! Update 4-2-26 Josiah and Brian came out to tuneup and clean the A/C. They were friendly and professional explaining what was happening during the service. Thank you!!!
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Marcia Jackson profile picture
Marcia Jackson
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Always a pleasure to have McCormick Heating & Cooling over to keep my HVAC system up and Running. Justin and Josiah were professional, punctual, and explained some basic maintenance I should keep my eyes on. 10/10 would recommend Justin and McCormick Heating & Cooling to anyone needing such services.
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Nick Minar
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Angelo was a fantastic tech, his other coworkers were just as great, they took care of us 100% and left my furnace room better than they found it, very happy…Thank you McCormick Heating and Cooling!
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derrek majors profile picture
derrek majors
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Angelo was very good at his job, went above what was necessary to make sure everything was installed correctly and will remain safe for us for the future. Cleaned up everything and looks better than before he arrived. Thank you
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Yvonne Majors profile picture
Yvonne Majors
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Wow! What a great experience. Justin was so cheery and fast. He got everything fixed and even changed out the filter. Thanks a bunch
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Kara Tuzinovic profile picture
Kara Tuzinovic
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David and Jason replaced my H Vac system. They were so very knowledgeable and kind. They explained how to use and perform maintenance on my new system. I was extremely pleased how they showed care for my home. Thank you gentlemen I truly appreciate you both. I would recommend McCormick to anyone needing work with their H Vac system.
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Cathy Miller profile picture
Cathy Miller
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I’ve been using McCormick for 7 years now- they are very skilled at working on my non-traditional HVAC mini split system and have consistently saved me money over other companies. Josiah was able to diagnose and fix my heat issue on the spot! Thanks McCormick!
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Kimberly Lammertin profile picture
Kimberly Lammertin
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Justin and the team at McCormick Heating & Cooling were excellent. They took the time to thoroughly diagnose issues with my boiler, test multiple valves, and walk through the system carefully to identify the most cost-effective solution rather than just recommending unnecessary replacements. Their approach was thoughtful, transparent, and very professional. Justin in particular was fantastic—knowledgeable, patient, and clearly experienced. He explained what he was doing at each step and made sure everything was working properly before finishing the job. In the end they replaced the necessary components and got the entire system running perfectly. It’s rare to find a company that is this honest, responsive, and detail-oriented. Highly recommend McCormick Heating & Cooling if you want quality work and technicians who genuinely care about doing the job right.
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Alexander Whiteman profile picture
Alexander Whiteman
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Quick service. In and out quick. Couldn’t expect anything better.
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Gavin Torres profile picture
Gavin Torres
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My entire experience was smooth, informative and successful! Angelo and David installed the new furnace. They were efficient and patient with all my questions. And they were knowledgable and friendly! Highly recommended for your HVAC needs! Thank you Mcormick!
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Isa Segismundo
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No Heat or No AC? We're Here 24/7

Fast after-hours emergency HVAC service when your system can't wait.

How Fast Can McCormick Reach Fort Lupton?

Call McCormick at (720) 443-0339. Your call is answered by our office, and a technician is sent from our Greeley headquarters at 2881 S 31st Ave, south on US-85 to Fort Lupton. Tell us where you are and what the system is doing. The more we know before the truck leaves, the better prepared your technician is.

McCormick is a Trusted Armstrong Air Partner
Voted Best HVAC & Furnace Repair Service in Greeley, Colorado
Voted Best HVAC & Furnace Repair Service in Fort Collins, Colorado
McCormick Heating and Cooling is a BBB Accredited Business
Our HVAC Techs are NATE Certified Technicians
Our company is Google Guaranteed Service Provider

Frequently Asked Questions (FAQ)

Fort Lupton's Trusted Heating & Cooling Team

Homeowners across Fort Lupton and Northern Colorado have left McCormick Heating & Cooling more than 800 Google reviews, and every technician we send into a Fort Lupton home is NATE- and EPA-certified, and the company is insured in Colorado.

When your furnace quits on a subzero Fort Lupton night or your AC gives up in July, Call (720) 443-0339..

McCormick Heating & Cooling · 2881 S 31st Ave #3, Greeley, CO 80631, United States

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