15+ years • 6,500+ jobs completed • 1,500+ Oklahoma homes served
National Accounts · Facility-Maintenance Vendors
Your Oklahoma HVAC subcontractor for national accounts
I’m Dave Hartzell. If you run facilities for a national chain, or you’re an FM vendor managing work orders across the map, I’m the licensed HVAC contractor on the ground in central and northwest Oklahoma. I take dispatched work orders, document everything, and report back the way your platform expects. I spent seven years as a Sprint facilities manager, so I’ve sat in your chair. Now I’m the boots on the roof.
Mission-critical credibility
I’ve run a hardened national-carrier building. Yours is in good hands.
Before Hartzell’s Heat and Air, Sprint recruited me to run a roughly $34 million expansion of a hardened, mission-critical long-distance switch in Fort Worth, against a federal deadline. We came in under budget and finished with zero FCC-reportable issues, on a live building carrying emergency-services traffic. I understand the power, the cooling, the controls, and the redundancy a building like that demands, because I built and ran one.
And I bring the same discipline forward: enterprise building automation and predictive maintenance. On a carrier network you don’t wait for it to break. You monitor it, you trend it, and you fix it before it fails. That’s how I keep a national chain’s systems running and your accounts happy, not by chasing breakdowns, but by catching them on the trend.
Who I work with
I subcontract directly for national chains with locations in Oklahoma, and for the facility-maintenance vendors who manage their HVAC work orders. If your stores, restaurants, banks, clinics, or retail sites need a reliable local trade in this part of the state, that’s me. I take dispatched work through the major platforms and report back the way you need it.
National chains, direct
Multi-location brands that want one accountable HVAC contractor for their Oklahoma sites, not a different unknown every visit.
FM vendors and aggregators
I work through facility-maintenance platforms like ServiceChannel, Corrigo, Lessen, and CBRE-managed programs. Send the work order, I run it and close it out clean.
Commercial and light industrial
Rooftop units, splits, walk-in cooling adjacent work, and controls. I size with Manual J and document every system I touch.
Why a former facilities manager is the right local trade
I spent seven years as the onsite facilities engineer for Sprint, managing the largest infrastructure project in the company’s history. I was the one holding vendors to standard: the work order, the scope, the not-to-exceed, the commissioning paperwork, the maintenance manual, the tag on every door and fixture. I know that side cold because I lived it. So when your work order lands with me, you get a contractor who already thinks like the person who wrote it.
What you get with every dispatched job
- Clean documentation: before and after photos, scope, and findings reported back through your platform, automatically.
- Honest NTE discipline: I quote it straight before work starts. No surprise invoices, no padded hours.
- Predictive, not reactive: I push monitoring and proactive checks so a unit gets caught on the trend, not at 2 a.m. on a holiday weekend.
- Licensed and accountable: Master HVAC license, NATE certified, fully insured, marked trucks, real local address in Kingfisher.
- One name, every visit: the same crew that knows your sites, not a rotating cast of unknowns.
It’s the same standard whether it’s a hardened carrier switch or a rooftop unit on a chain restaurant in Oklahoma: monitor it, trend it, maintain it, and tell you straight what it costs before any work starts.
Call 405-375-4822 Read Dave’s full experience →
Where I cover
I’m based in Kingfisher and cover central and northwest Oklahoma: Kingfisher, Canadian, Oklahoma, Garfield, Logan, Major, and Blaine counties, including the Oklahoma City metro and Enid. For larger national-account programs, talk to me about coverage. If your sites are in this part of the state, I’m the local trade that shows up.
National accounts FAQ
Do you take dispatched work orders from facility-maintenance vendors?
Yes. I subcontract for national chains and the FM vendors who manage their HVAC work, including platforms like ServiceChannel, Corrigo, Lessen, and CBRE-managed programs. Send the work order and I run it, document it with photos, and close it out the way your platform expects.
What areas of Oklahoma do you cover for national accounts?
I’m based in Kingfisher and cover central and northwest Oklahoma: Kingfisher, Canadian, Oklahoma, Garfield, Logan, Major, and Blaine counties, including the Oklahoma City metro and Enid. For larger multi-site programs, call me to talk through coverage.
What makes Dave Hartzell different from a typical dispatched contractor?
I spent seven years as the onsite facilities manager for Sprint, so I’ve sat in the chair of the person writing the work order. I know clean documentation, honest not-to-exceed pricing, and commissioning paperwork because I held vendors to that standard myself. You get a licensed Master HVAC contractor who already thinks like your program manager.
Are you licensed and insured for commercial work in Oklahoma?
Yes. I hold an Oklahoma Master HVAC license, am NATE certified, and am fully insured. Hartzell’s Heat and Air is a real local business at 602 S Main St in Kingfisher, with marked trucks and the same crew on every visit, rated 4.8 stars across 300+ reviews.
How do I set up Hartzell’s as a vendor for my Oklahoma sites?
Call me at 405-375-4822 or have your program team reach out. I’ll get added to your platform, confirm coverage and rates, and start taking dispatched work orders for your Oklahoma locations.
Need a reliable HVAC trade for your Oklahoma sites?
I’m the licensed local contractor who already speaks your language, takes your work orders, and documents every job. Call and let’s get Hartzell’s set up as your Oklahoma vendor. 4.8 stars across 300+ reviews.
Call 405-375-4822