Some companies serve a community.
We grew up in it.
Hartzell’s Heat & Air is a family-owned HVAC company in Kingfisher, Oklahoma, founded by Dave Hartzell about 15 years ago. We hold a Master HVAC License (#00115936), NATE certification, and IGSHPA Accreditation for geothermal installation. We are a Mitsubishi Diamond Dealer, Trane TCS SELECT dealer, and BBB A+ Accredited Business — rated 4.8★ across 271 reviews in central Oklahoma.
At a Glance
Hartzell’s Heat & Air has been taking care of central Oklahoma homes and businesses for 15+ years. We are not a franchise. We are not a call center with a truck. We are a family that has lived, worked, and built a life in this part of Oklahoma — and we treat every customer like a neighbor, because most of them are.
Kingfisher, Oklahoma · In business 15+ years · 4.8★ / 271 reviews · 405-375-4822
BusinessRate 2026 Annual Award
Ranked #1 Air Conditioning Contractor in Kingfisher
Powered by verified Google Reviews. This award belongs to every member of our team — their loyalty and commitment to doing the job right is what earned it.
The Story
It started with trash duty.
Dave Hartzell grew up watching his father work with his hands. By age ten, Dave was picking up trash at Lee Hartzell Electric in Woodward, Oklahoma — not because he had to, but because that is where his family worked and that is what you did. By thirteen he was an apprentice electrician. Junior and senior year of high school he was on a work-release program, out at noon, leading a four-man crew of adults who were older than him in every way except experience.
Those men drove. Dave ran the work. A lot of them went on to build solid careers of their own. Dave still thinks about them.
From Woodward to Watonga — and everything that came with it.
After Autry Technology Center in Enid — one of Oklahoma’s finest vo-tech schools — Dave discovered that HVAC was not just a trade. It was the thing he was built for. He went on to Oklahoma State University, where he met two men who would become lifelong friends: Sammy Tomlinson and John Thomas. All three went on to build HVAC companies rooted in the same values. John Thomas founded Thomas Heat, Air & Refrigeration down in Roff. Sammy built Sammy’s Heat, Air & Sheet Metal in Watonga, where he had been serving the community since 1973.
Dave spent twelve years at Sammy’s. Twelve years learning from Sammy and his parents — not just about systems and equipment, but about the people of this region. How they think. What they care about. What it means to shake someone’s hand and actually mean it. Dave sold Carrier systems to Kingfisher-area families for over a decade. Some of those families are now on their third system. Their children are calling us for the first time.
He also fought fires for five years.
During his years in Watonga, Dave served as a volunteer firefighter. Five years of showing up when things went wrong for other people — not for a paycheck, but because that is the kind of person he is. That did not change when he came home to Kingfisher.
Then Sprint called.
Dave spent seven years as the onsite engineer for Sprint, managing what would become the largest project in the company’s history — a classified national infrastructure build that required the kind of precision most contractors never face. The project involved a $20 million infrastructure upgrade with an additional $10 million component. It was delivered under budget, ahead of schedule, and with zero FCC outages on a live network.
Every piece of equipment on that project was commissioned before Dave left the site. Every system had an operating manual, a maintenance manual, and an identifier tag. Every door. Every fixture. Sprint asked Dave to name his price. He gave them a job done right instead.
“The man who helped build the infrastructure that could locate your cell phone to within one foot is the same man who will size your home’s HVAC system to within one ton — and stand behind it.”
Hartzell’s was the next step. Not a detour — the destination.
When Dave founded Hartzell’s Heat & Air, he named it after the place where he first learned what work was — Lee Hartzell Electric, Woodward, Oklahoma. He brought with him everything Sammy taught him, everything his father taught him, and a standard of documentation and accountability that most HVAC companies in this state have never been asked to meet. His daughter Shelby runs operations today. When a commitment is made to a customer, Shelby is the one who makes sure it happens.
Why Our Work Is Different
A lot of HVAC companies pay their technicians by the hour. We do not. Our technicians are compensated based on the quality and completeness of the work they complete — which means the person in your home has a direct personal stake in getting it right. There are no incentives here to run up hours, oversell equipment, or recommend repairs that are not needed. The incentive is to solve the problem correctly the first time and leave a customer who is glad they called us.
That is how our people are rewarded, and it is how this company has maintained a 4.8-star rating across 271 Google reviews.
Our technicians are paid to solve problems — not to spend time.
That difference shows up in your home every single time.
We back every job with a 6-month labor guarantee. We use Trane Connected Diagnostics for remote monitoring on qualified systems. And we size every system using Manual J load calculations — not guesswork, not what fits in the truck.
You Get Photos of the Work — Automatically
Customers love seeing before and after photos of what was done. So the moment a job is marked complete in Housecall Pro, our system automatically sends those photos directly to the customer — no manual emails, no forgotten follow-ups. Just instant, professional communication.
Triggers when job is marked complete in Housecall Pro
Confirms before & after photos are attached
AI drafts a clean, customer-friendly summary email
Photos delivered to the customer automatically
Send status logged in Google Sheets for accountability
Customers get visual proof of the work without anyone on the team lifting a finger.
Credentials & Partnerships
Geothermal certification held by very few Oklahoma contractors.
Best Newcomer of the Year 2016, Air Products Supply.
Top tier Trane dealer status.
Qualifies customers for the 12-year manufacturer warranty.
North American Technician Excellence certification.
Manual J, S, and D load calculations on every installation.
Oklahoma License #00115936.
Better Business Bureau accredited since 2014.
Community
This company exists because of Kingfisher and the surrounding communities. We sponsor Kingfisher Yellowjacket soccer. We support the schools — computers, yearbooks, vo-tech programs. We show up to the Masonic Lodge pancake breakfast every year to support the school band. Dave mentors vo-tech students by bringing them onto real job sites because someone did that for him once and it changed everything.
We serve Kingfisher, Watonga, Hennessey, Enid, the Oklahoma City metro, and communities throughout central Oklahoma. For geothermal work, we travel statewide. If you used to call Sammy’s Heat, Air & Sheet Metal in Watonga — welcome. A lot of your neighbors made the same call. We are glad you found us.
The Team
Dave Hartzell — Owner
Born in Mooreland, OK. Raised in Woodward, OK. Master HVAC License. Geothermal specialist. Sprint-certified infrastructure engineer. Watonga Volunteer Fire Department (5 years). Kingfisher resident since founding the company in 2008.
Shelby Hartzell — Operations Manager
Dave’s daughter. If Dave makes a promise, Shelby is the one who makes sure it happens. She manages day-to-day operations and keeps the company running the way her father built it to run.
Joshua Hartzell
Dave’s son. Self-employed software developer based in Oklahoma City.
Our Technicians
NATE certified, background checked, and trained to the standard Dave has held himself to since he was thirteen years old running a job site in Woodward.
Nearby Communities We Serve
Meet the Team
Carl — Maintenance Tech
Ace — HVAC Tech
Dustin — HVAC Installer
Ready to Work With Us?
Central Oklahoma’s most credentialed HVAC team. Call us today or get a free estimate on a new system.
Frequently Asked Questions
How long has Hartzell’s Heat & Air been in business?
Hartzell’s Heat & Air has been serving Kingfisher and central Oklahoma for 15+ years. Dave Hartzell, the owner, has 45 years of HVAC experience.
What certifications does Hartzell’s Heat & Air hold?
Dave Hartzell holds a Master HVAC License (#00115936), NATE certification, IGSHPA Accreditation for geothermal, Mitsubishi Diamond Dealer status, Trane Comfort Specialist TCS SELECT certification, and ClimateMaster GeoElite dealer status. We are also a BBB A+ Accredited Business and ACCA member.
Is Hartzell’s a locally owned company?
Yes. Hartzell’s Heat & Air is 100% locally owned and operated. Dave Hartzell works in the field personally on service calls and installs. We are not a franchise or national chain.
What is the 6-Month Labor Guarantee?
Every repair and installation performed by Hartzell’s Heat & Air comes with a 6-month labor guarantee. If the same problem returns within six months of our service, we fix it at no labor charge. This is our commitment to doing the job right the first time.
Does Hartzell’s Heat & Air serve Spanish-speaking customers?
Sí — Se Habla Español. We serve the Spanish-speaking community throughout Kingfisher and central Oklahoma. Call 405-375-4822 to schedule service in Spanish.