National Accounts Commercial HVAC and Refrigeration in Oklahoma

From a former facilities manager who now runs the service company: I know what you need from a vendor, because I had to find one myself. I am Dave Hartzell. For seven years I was Sprint’s facilities manager, the person choosing and vetting the contractors who kept the buildings running. Now I run Hartzell’s Heat & Air, and I take national-account and facility-maintenance vendor work as your licensed local Oklahoma contractor.

I have sat in the facilities manager chair

Most contractors pitch you. I understand you, because I was you. I spent seven years as Sprint’s facilities manager, and I ran a roughly 34 million dollar expansion of a hardened national-carrier switch against a federal deadline, under budget, with zero regulatory issues. I know what it takes to choose a vendor, hold them to a standard, and trust them with a building you are responsible for. I also spent a year subcontracting national-chain work in Dallas, so I know the contractor side too. I have the standards because I set them.

What I handle for national accounts

• Rooftop units (RTUs): repair, replacement, and scheduled maintenance on packaged rooftop systems for retail and restaurant buildings.
• Commercial refrigeration: walk-in coolers and freezers, reach-in cases, and the refrigeration that keeps product safe in dollar stores and restaurants.
• Split and packaged HVAC: comfort cooling and heating across light commercial sites.
• Proactive monitored maintenance: I learned predictive maintenance keeping a mission-critical building alive. I would rather catch it on the trend than meet you at a 2 a.m. failure.
• 24/7 emergency response: a walk-in going down is product on the line, and I treat it that way.

The chains and vendors I want to serve

If you manage facilities for a national chain, or you are a facility-maintenance vendor dispatching local contractors, I want to be your Oklahoma vendor. The accounts I am built to serve include corporate restaurant and retail brands like Sonic, McDonald’s, KFC, Wendy’s, Dollar General, and Dollar Tree, and the dispatch networks behind them. To be clear, these are the kinds of accounts I am ready to take on as your local contractor, not a customer list I am claiming. Send me a location in central Oklahoma and let me prove it on one site first.

Where I cover

My core footprint is the Oklahoma City metro plus seven counties: Kingfisher, Canadian, Oklahoma, Garfield, Logan, Major, and Blaine. For multi-site national-account work I will travel beyond that by arrangement. Tell me where your Oklahoma locations are and I will tell you straight whether I can serve them well. I would rather turn down a site I cannot cover right than take it and let you down.

Vendor-ready: platforms, paperwork, and terms

See the commercial work

Want proof before you onboard me? Look at the commercial and industrial jobs I have done across Oklahoma on my commercial HVAC projects page. Real buildings, real systems, real Oklahoma.

Common questions from national accounts and FM vendors

Do you take national-account and facility-maintenance vendor work in Oklahoma?

Yes. I work as the local Oklahoma vendor for national chains and the facility-maintenance vendors that dispatch them. If you manage HVAC or refrigeration for stores or restaurants in central Oklahoma and need a licensed local contractor on the ground, that is exactly the work I want. Call 405-375-4822 or email office at hartzellsheatair.com.

What area do you cover for commercial accounts?

I cover the Oklahoma City metro plus seven counties: Kingfisher, Canadian, Oklahoma, Garfield, Logan, Major, and Blaine. For national-account and multi-site work I will travel beyond that footprint by arrangement. Tell me where your locations are and I will tell you straight whether I can serve them well.

Are you set up for work-order platforms, COI, W-9, and net-30 invoicing?

Yes. I am fluent with work-order dispatch platforms like ServiceChannel and Corrigo, including check-in and check-out, photo documentation, and not-to-exceed limits. I carry commercial liability insurance and can provide a certificate of insurance and a W-9 on request, and I invoice on net-30 terms for established accounts.

What commercial equipment do you service?

Rooftop units, split systems, and packaged HVAC, plus commercial refrigeration including walk-in coolers and freezers and reach-in cases. That mix covers most dollar stores, restaurants, and retail buildings. I hold a master HVAC license and run proactive, monitored maintenance, not just break-fix.

Do you handle after-hours and emergency calls for commercial sites?

Yes. Refrigeration and comfort failures do not wait for business hours, so I take 24/7 emergency calls for commercial accounts. A walk-in cooler going down is product on the line, and I treat it that way.

Why should a facility-maintenance vendor trust a local Oklahoma contractor like you?

Because I spent seven years as Sprint’s facilities manager. I was the buyer choosing and vetting vendors, so I know what you need from a contractor because I had to find it myself. I also spent a year subcontracting national-chain work in Dallas. I know both sides of the table, and I run my shop to the standards I once held my vendors to.