Geothermal Heat Pumps in Oklahoma: Homeowner Decision Hub

Free Saturday and Sunday consultations. I look at the house, the yard and what is heating it now, size the system and walk you through the numbers, at no charge and with no obligation. For geothermal I travel statewide, as availability allows. Start now and the loop work and the install still fit before Thanksgiving, where the schedule allows. New-system estimates are free on weekdays too. Call 405-375-4822 to set a time. The online booking link on this page is for repair and diagnostic visits, which are paid.

Direct answer: geothermal makes sense in Oklahoma when the house, the loop option and the budget line up, and the loop is the part that lasts. In 700+ geothermal jobs at Hartzell’s Heat & Air since 2017 I have not replaced a loop field. For a unit replacement on a loop you already have, most of my jobs run $20,000 to $25,000. New-system estimates are free. I built this hub so you can pick the next useful step without me treating every call like a replacement sale. I also pulled ten years of Oklahoma electricity rate history from the federal filings, so you can see what power has actually done around here.

What a sound decision needs

• A load and ductwork review, not a tonnage guess.
• A realistic loop design and access plan.
• Operating measurements for an existing system.
• Current written pricing, incentive, financing, maintenance, and warranty documents before relying on a changing claim.

Loop types for Oklahoma properties

The loop is the part of a geothermal system you cannot see and cannot easily change later, so I pick it from the property, not from habit. Here is how the four loop types line up on Oklahoma land.

I design the loop and size the system. The drilling itself is done by my OWRB-licensed driller. The side-by-side detail is on horizontal vs vertical vs pond loops, and well water gets its own page on water quality and open-loop risk. Heating a shop or barn instead of a house changes the load and the loop, see geothermal for shops and barns.

What I measure before I recommend anything

• Home load and ductwork. ACCA Manual J load, duct size, static pressure, airflow, return path, and whether the house can actually use the capacity being quoted.
• Loop and water side. Loop pressure, pump operation, entering and leaving water temperature, flow in GPM, freeze protection, and any sign of a leak.
• Heat pump operation. Electrical draw, control calls, blower operation, coil condition, refrigerant-circuit behavior, the desuperheater when there is one, and the manufacturer’s targets.
• Money path. Cash, financing, what the utility program will actually document for your address, and whether waiting is smarter than forcing a project this year.

Loops outlast the equipment

The question I hear most after price is how long the loop lasts. Here is my answer from my own records, not a brochure: across 700+ geothermal jobs I have not replaced a single loop field. I have loops in the ground that are on their third generation of heat pump equipment. Same pipe, third unit. When I talk about a geothermal replacement, I mean replacing the unit. The loop stays. The Plastics Pipe Institute puts the design life of heat-fused HDPE loop pipe at typically more than 50 years when it is specified and installed correctly.

“We don’t replace the loops. They last.”Dave Hartzell, Hartzell’s Heat & Air, Kingfisher

Some numbers from my own records, which start in 2017 when my current job system went in: 250+ geothermal customers and 300+ geothermal systems, with plenty of homes running more than one. Across 727 completed geothermal jobs, loops were flushed or re-pressurized 169 times, condensate drains came up 163 times, refrigerant charge 115, loop pumps and flow centers 48, and compressors 13. The full table is on the real disadvantages of geothermal.

What does wear is the stuff that moves or collects. The most common work I do on geothermal systems is flushing and re-pressurizing loops, because air works its way in over time, and clearing condensate drains. After that come refrigerant charge, loop pumps and flow centers, thermostats, and capacitors. Compressor failures are rare. If you are weighing an older system, whether an existing loop can be reused is usually the first question worth answering.

What geothermal work costs before the quote

I will not put a new-system price on a webpage, because the loop drives the cost and I have not seen your ground yet. For a unit replacement on a loop you already have, I did publish what my completed geothermal jobs actually cost. What I can pin down is what it costs to get a real answer.

If the upfront number is the thing standing in your way, the Full Coverage Geothermal Plan near the top of this page is the lease path, with nothing upfront. I broke it down on what geothermal costs per month, and compared it against buying on my geothermal lease page.

• Geothermal diagnostic, $348 flat. Weekday or after hours, the same number. Geothermal does not take the $309 emergency rate. That $348 covers loop pressure, refrigerant charge, desuperheater, controls, and heat exchanger, and you get a written report and quote before I leave.
• Geothermal tune-up, $348. A separate product from the diagnostic, priced the same on purpose.
• Estimate on a new system, free. No truck charge to quote a replacement.

Geothermal maintenance plans. Geo One Visit Spring or Fall 360 is $360 a year, Geo Spring and Fall 360 is $428 a year, and Geo Full Year 360 is $499 a year. The plan names changed in 2026, so an older quote may list a name I no longer sell. Details are on my geothermal maintenance plans page.

I am IGSHPA accredited and a ClimateMaster GeoElite dealer, which is the reason I can measure a loop instead of guessing at it.

Commercial geothermal

I do commercial ground-source work as well as residential. A light commercial diagnostic up to 15 tons is $389 flat, day or night, and you can book it online. Above 15 tons I size the equipment on site and price it from there, because a building’s load is not something to guess at over the phone.

Where I install and service geothermal

My everyday heating and air trucks run seven counties: Kingfisher, Canadian, Oklahoma, Garfield, Major, Logan, and Blaine. Geothermal is different. For geothermal I travel across Oklahoma and into most of the states that border it, depending on the customer and the project. If you are in Tulsa, Coweta, or anywhere else in Oklahoma and you want a geothermal install, repair, or tune-up, call 405-375-4822 and tell me where the property is.

Questions Oklahoma homeowners ask me about geothermal

Geothermal measurement guides

Use these when you are trying to make sense of loop pressure, water temperatures, flow, or a fault code:

• Why geothermal loop pressure changes with temperature
• How to read EWT, LWT, GPM, PSI and Delta T
• How to calculate COP on a geothermal heat pump
• ClimateMaster Tranquility 30 fault codes
• How to tell whether a loop field is too small

What not to trust in a geothermal quote

• A savings or payback number that was not built from your house, your utility rate, your existing equipment, and your loop choice.
• A rebate amount that your utility’s current program and your service address do not both support.
• A geothermal diagnosis that skipped loop pressure, water temperatures, flow, airflow, and electrical readings.
• A troubleshooting answer online that walks you into the panel, refrigerant, pumps, antifreeze, wells, or loop piping. Those are jobs for a licensed tech. If something looks wrong, see when to shut the system down and call me.

Finished geothermal projects

Published at city level with customer details left out: a two-system install with drilled wells in Piedmont, a geothermal home in Okeene, and a three-floor lake house near Lake Texoma. For the soil, towns and utilities on my home side of the state, see geothermal HVAC in northwest Oklahoma.

For measurement details, see EWT, LWT, GPM, PSI, and Delta T. For appointment options, call 405-375-4822 or book online.