15+ years • 6,500+ jobs completed • 1,500+ Oklahoma homes served
★ HAPPY 4TH OF JULY ★
July 4th in Oklahoma means a full house, a hot kitchen, and the AC running flat out. Before the cookout, let me make sure yours can keep up. I hold same-day spots open for no-cool calls across Kingfisher and Central Oklahoma, and new-system estimates are always free. $99 dispatch, $111 diagnostic on repairs. 4.8 stars, 290+ reviews. Happy Independence Day from my family to yours. Call 405-375-4822 or book at hartzellsheatair.com.
Repair, replacement, and new installs. Kingfisher to the OKC metro. I answer every call. Call 405-375-4822.
I am Dave Hartzell. I hold a Master HVAC license, I have 45 years in this trade, and I have run Hartzell’s Heat & Air out of Kingfisher since 2011. When you call, you get me or one of my techs, not a call center two states away. 4.8 stars, 290+ reviews.
Meet Dave: owner intro video coming soon.
A short clip from me on who I am, what I fix, and why I answer my own phone. Until then, call 405-375-4822 and you will get me on the line.
Federal 25C and 25D tax credits expired December 31, 2025. I work the live Oklahoma utility rebates instead, and the estimate shows you the real number.
Straightforward pricing
- $99 dispatch on every truck roll. Free on new-install estimates.
- $111 diagnostic, part of the $210 flat repair-call price. Accept the estimate within 10 days and I give the $99 dispatch back.
- Free estimates on new installs. No charge to walk through replacement options.
Call (405) 375-4822. 4.8 stars / 290+ reviews.
Hartzell’s Service Area, Central Oklahoma HVAC, Geothermal, and Mini-Split Service
I serve seven counties in central Oklahoma out of my shop in Kingfisher. For geothermal installs, I travel statewide. Click any county below to see what services are available, which utility rebates apply, and how to get me out there. If you are not sure whether you are in my territory, call me at 405-375-4822, I will tell you straight.
Geothermal Service Statewide
For geothermal installations, I travel anywhere in Oklahoma. The loop drilling, installation, and commissioning all require specialized IGSHPA-accredited expertise that most HVAC contractors do not have. If you have a geothermal project outside my primary service area, call me at 405-375-4822 and I will tell you if it makes sense for me to travel to you. For large commercial jobs, the travel is almost always worth it.
Service Area FAQ
Does Hartzell’s serve Enid Oklahoma?
Yes. Hartzell’s Heat and Air serves Enid and all of Garfield County. Enid is in OGE territory, which offers a $1,000 per ton geothermal rebate. I am actively hiring a satellite technician for the Enid area to shorten response times. Call 405-375-4822 for Enid service.
Does Hartzell’s serve Oklahoma City?
The northwest OKC metro and Oklahoma County, yes. I serve Yukon, Mustang, Piedmont, Bethany, Warr Acres, and the northwest quadrant of OKC. For southeast OKC or the Southside, response times may be long, call me and I will be honest about it.
Will Hartzell’s travel outside the primary service area for geothermal?
Yes. For geothermal installs, I travel anywhere in Oklahoma. IGSHPA-accredited geothermal installers are rare. If you are in Tulsa, Lawton, or anywhere else in the state, call 405-375-4822 and let us talk about the project.
What counties get the CKenergy geothermal rebate?
CKenergy pays $2,000 per ton (Source: CKenergy) (maximum $24,000) in Blaine, Caddo, Canadian, Comanche, Custer, Dewey, Grady, Kiowa, Roger Mills, and Washita counties. Of those, Hartzell’s primarily serves Blaine and Canadian counties. Kingfisher County is NOT in CKenergy territory.
Can you come out the same day?
Most days, yes. Call 405-375-4822 in the morning and I will get someone to you as fast as the schedule allows.
Do you offer financing on a new system?
Yes. I work with Synchrony, Wells Fargo, Wisetack, Klarna, and JB Financing so you can spread the cost. I go over the options with you during the free estimate.
Are the federal tax credits still available in 2026?
No. The federal 25C and 25D credits expired December 31, 2025. The Oklahoma utility rebates are still active, and I help you claim those.
Not Sure if You’re in My Area?
Call me and ask. I would rather tell you honestly that you are at the edge of my territory than have you wait on a contractor who stretches too thin. 405-375-4822.
4.8 stars / 290+ reviews | Kingfisher, Oklahoma | IGSHPA Accredited Statewide Geothermal