Geothermal Heat Pump Installation in Oklahoma | Hartzell’s Heat & Air
Dave Hartzell designed and installed his first geothermal system in central Oklahoma in the early 1990s — before most area contractors had heard of ground source heat pumps. He pursued IGSHPA Accredited Installer certification specifically because it covered loop field design, which is where most geothermal failures happen. A system can have a top-of-the-line ClimateMaster unit inside and still underperform if the loop is undersized or improperly installed. Every geothermal installation Hartzell’s does starts with a Manual J load calculation and a proper loop field design — not a rule-of-thumb estimate. Kingfisher, Edmond, El Reno, Watonga, and communities across Oklahoma — we travel for geothermal.
Geothermal installation starts at $15,000 for a residential system, before Oklahoma utility rebates. With CKenergy ($2,000/ton up to $24,000), OG&E ($1,000/ton), or PSO ($1,400) rebates, your net cost drops significantly. Free estimates on all installs.
✓ IGSHPA Accredited Installer
✓ ClimateMaster GeoElite Dealer
✓ Free Estimates Statewide
IGSHPA Accredited Installer · ClimateMaster GeoElite Dealer · Free Estimate · 405-375-4822
Free consultation — we will tell you if geothermal fits your property
Watch: Geothermal Loop Field Drilling in Oklahoma
Most homeowners never see what happens underground. These two videos show our crew drilling and installing a closed-loop geothermal system in central Oklahoma — start to finish.
Part 1 — Drilling the loop field
Part 2 — Loop installation & backfill
What Makes Geothermal Different
Every other heating and cooling system — gas furnace, air conditioner, air-source heat pump — fights against the outdoor climate. Geothermal ignores it. The system exchanges heat with the earth, which maintains a stable 55–60°F temperature year-round in central Oklahoma regardless of whether it’s 108°F in August or 8°F during an ice storm.
The result: 300–500% efficiency in both heating and cooling modes, year-round. Not seasonal efficiency — all-season efficiency. And because it uses the same loop field for both, you have one system instead of separate heating and cooling equipment.
300–500%
Year-round efficiency
50 yrs
Ground loop warranty
$2,000/ton
CKenergy rebate (max $24k)
Free
In-home estimate
Loop Field Types We Install
The loop field is the buried pipe network that exchanges heat with the earth. The right type depends on your property. We assess this during the free estimate visit.
Horizontal Closed Loop
Pipe laid in trenches 4–6 feet deep. Requires adequate land area — typically 400–600 linear feet of trench per ton of capacity. Most central Oklahoma rural homes qualify. Least expensive loop type when land is available.
Best for: Rural lots with 1/4 acre or more of open space
Vertical Closed Loop
Boreholes drilled 200–400 feet deep with U-bend pipe installed. Requires much less surface area than horizontal. Higher installation cost due to drilling, but works on smaller lots and gives excellent thermal performance in Oklahoma’s clay soils.
Best for: Suburban lots, limited yard space, rocky terrain
Pond / Lake Loop
Coiled pipe submerged in a pond or lake at least 8 feet deep. Usually the least expensive option when a suitable water body exists. Excellent thermal performance since water has good heat transfer. Requires a properly sized water body on the property.
Best for: Properties with a pond or lake of sufficient size and depth
Open Loop (Well Water)
Uses groundwater from a well as the heat exchange medium. Very efficient where available. Requires a well with sufficient yield and acceptable water quality, and a discharge method (return well or drainage). Common in rural Oklahoma where wells are already present.
Best for: Properties with high-yield wells and good water quality
The Installation Process
- Free property assessment — We walk your lot, review your utility bills, discuss your goals, and determine which loop type is right for your property.
- Manual J load calculation — Before sizing equipment, we calculate your home’s actual heating and cooling load. A properly sized geothermal system performs correctly; an oversized or undersized system does not.
- Loop field design — We design the loop to match your system size, soil conditions, and available space. This is where IGSHPA training matters — loop undersizing is the most common geothermal installation failure.
- Permit and utility coordination — We pull the necessary permits and confirm your rebate eligibility with your utility before work begins.
- Loop field installation — Excavation (horizontal) or drilling (vertical), pipe installation, pressure testing, backfill and site restoration.
- Heat pump and air handler installation — Equipment installed inside the home, connected to loop field and ductwork.
- System commissioning — Flow rates, refrigerant charge, controls, and performance verification. We don’t leave until it’s right.
- Rebate documentation — We provide the AHRI certificate, contractor license, IGSHPA credentials, and completed utility rebate application.
Equipment We Install
Hartzell’s is a ClimateMaster GeoElite Dealer. We also install WaterFurnace and other major geothermal brands. Equipment selection depends on your system design, load requirements, and budget.
ClimateMaster
GeoElite Dealer. Tranquility and Genesis series. Industry-leading variable-speed compressor technology for maximum efficiency and comfort.
Desuperheater
Optional add-on that uses waste heat from the geothermal process to pre-heat domestic water. Can cut water heating costs 50–70% during heating and cooling operation.
Dual-Capacity Systems
Two-speed or variable-capacity heat pump units for superior humidity control and comfort — particularly valuable in Oklahoma’s high-humidity summers.
What Does Geothermal Installation Cost in Oklahoma?
Geothermal systems cost more upfront than conventional equipment, but operating costs run 40–60% lower. Oklahoma utility rebates significantly reduce net cost (the federal 25D tax credit expired December 31, 2025). These are typical installed ranges for central Oklahoma — exact quotes provided after a site evaluation.
| System / Scenario | Installed Cost | Notes |
|---|---|---|
| Typical residential (2–3 ton, horizontal loop) | $18,000 – $28,000 | Most common in Oklahoma; horizontal loops suit typical rural/suburban lots with open land |
| Larger home or vertical loop (3–5 ton) | $25,000 – $35,000 | Vertical loops required on smaller lots; drilling cost higher than trenching |
| Pond / lake loop (if pond is available) | $15,000 – $25,000 | Most cost-effective loop type when a qualifying body of water is accessible on the property |
| Federal 25D tax credit (expired Dec 31, 2025) | −$4,700 – −$9,100 | Expired December 31, 2025. Not available for 2026 installations. Carryforward from 2024/2025 returns may still apply. |
| CKenergy utility rebate (if eligible) | −$6,000 – −$24,000 | $2,000/ton, max $24k — stacks with other utility rebates. Blaine, Canadian, and 8 other Oklahoma counties. |
Installed estimates for central Oklahoma. Exact quote after Manual J load calculation and site evaluation. Loop field cost is the largest variable. Hartzell’s handles rebate paperwork (AHRI cert, contractor license, IGSHPA credentials) at no additional charge.
Oklahoma Utility Rebates in 2026
The federal 25D geothermal tax credit expired December 31, 2025. Oklahoma utility rebates remain fully active for 2026 installations:
| Utility | Rebate | Territory |
|---|---|---|
| CKenergy | $2,000/ton (max $24k) | Kingfisher, Blaine, Caddo, 10 counties |
| OG&E | $1,000/ton | OKC metro, Edmond, Yukon |
| Cimarron Electric | $600 | Kingfisher area co-op members |
| PSO | $1,400 flat | Eastern Oklahoma |
| OEC | $400–$700/ton | OEC territory |
See full Oklahoma geothermal rebates guide ›
Why Hartzell’s for Geothermal
- IGSHPA Accredited Installer — one of very few in Oklahoma. Proper loop design requires this training.
- ClimateMaster GeoElite Dealer — authorized to install and warranty ClimateMaster equipment.
- Every install starts with Manual J — we calculate the load before sizing the system.
- Rebate paperwork handled — AHRI cert, contractor license, IGSHPA credentials, completed application.
- 45 years of HVAC experience in Oklahoma — Dave knows the soil, the utilities, and the climate across central Oklahoma.
- No subcontractors for the loop field — Hartzell’s owns and operates the excavation work.
Geothermal by City
- Geothermal Heat Pumps in Yukon, OK (CKenergy $2,000/ton)
- Geothermal Heat Pumps in El Reno, OK (CKenergy $2,000/ton)
- Geothermal Heat Pumps in Mustang, OK (CKenergy $2,000/ton)
- Geothermal Heat Pumps in Edmond, OK (OG&E $1,000/ton)
- Geothermal Heat Pumps in Enid, OK (OG&E rebates)
- Geothermal Heat Pumps in Guthrie, OK (OEC rebates)
Is Geothermal Right for Your Home?
Answer 7 quick questions and get a personalized answer based on your property, utility company, and Oklahoma rebates. Free, no email required.
Find Out If Geothermal Makes Sense for You
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Ready to Go Geothermal?
Free estimates on all geothermal installations. Dave will size the system with a Manual J load calculation and design the right loop for your property. IGSHPA Accredited — ClimateMaster GeoElite Dealer.
Nearby Communities We Serve
Frequently Asked Questions
How do I know if my loop is the problem?
We record entering and leaving water temps, pressure, and flow. If numbers are off, we check pumps, air in the loop, and antifreeze mix.
Can you service ClimateMaster and WaterFurnace?
We work on many geo brands and follow model-specific procedures for charge (if DX), water flow, and controls.
Do geo systems need yearly maintenance?
Yes. Filter and coil care, pump and flow checks, and water quality keep performance steady and protect components.
What if part of my house is still uneven in temperature?
We review zoning, duct static pressure, and loop capacity to balance rooms within practical limits.
Can you add a desuperheater for water heating?
Many systems support it. We verify compatibility, piping layout, and homeowner hot-water use before recommending.