Oklahoma Geothermal Heat Pumps: 2026 Guide to Costs, Savings & Oil Country Advantage

By Sarah Chen, Energy Policy Analyst · Updated March 28, 2026 · 36 min read

Why Oklahoma Is Quietly Good for Geothermal

Oklahoma doesn't show up on most "best states for geothermal" lists. It has no state tax credits, no utility rebate programs, and some of the cheapest electricity in the country at 9.09¢/kWh (EIA 2024, rank 48 nationally). On paper, that should kill the geothermal case before it starts.

But Oklahoma has something most states don't: an army of experienced drillers. The same oil and gas industry that made Oklahoma City and Tulsa energy capitals left behind a deep bench of drilling contractors, rig operators, and well technicians who can install vertical bore ground loops faster and cheaper than drillers in states without that infrastructure. When your neighbor's cousin runs a drilling company, vertical bore quotes come in 15–25% below national averages.

Three things define the Oklahoma geothermal conversation:

1. Extreme climate swings. Oklahoma experiences genuine four-season extremes — 110°F summer highs and single-digit winter lows are both common. That means significant heating and cooling loads, which is exactly where geothermal delivers the most value. Heating degree days range from 3,200 (southeast) to 5,200 (Panhandle), and cooling degree days from 1,500 (Panhandle) to 2,400 (south-central). Both modes generate savings.
2. Propane and electric resistance heating. Oklahoma has 3.9 million people spread across 69,899 square miles, with vast rural areas where natural gas service doesn't reach. Thousands of homes rely on propane at $2.50–$3.50/gallon or electric resistance heating. These are the homes where geothermal delivers 7–10 year payback even with cheap electricity.
3. No state incentives — but also no obstacles. Oklahoma's minimal regulatory environment means no permitting nightmares, no special geothermal licensing beyond standard well-drilling permits, and fast project timelines. The federal 30% ITC (IRC §25D) is your only incentive, which means the economics are transparent and don't depend on legislative mood swings.

Let's be direct: if you heat with cheap natural gas in Oklahoma City or Tulsa and have a modern HVAC system, geothermal payback will likely exceed 18 years. But if you're on propane, building new, or replacing a dying system — the numbers are surprisingly competitive, especially with Oklahoma's drilling cost advantage.

Quick Verdict: Should You Go Geothermal in Oklahoma?

Does Geothermal Work in Oklahoma?

Geothermal heat pumps work exceptionally well in Oklahoma. The state's ground temperatures are near-ideal for both heating and cooling, and the climate demands significant energy for both modes — maximizing the annual savings window.

Ground Temperatures by Region

Oklahoma's sweet spot is that ground temperatures cluster between 60–65°F statewide — warm enough for efficient heating (COP 3.8–4.5) and cool enough for efficient cooling (COP 4.5–5.5 when rejecting heat into 63°F earth vs. 100°F+ air). The balanced heating/cooling demand in the OKC and Tulsa corridors means both modes generate savings year-round, unlike cooling-only states like South Texas or heating-only states like Minnesota.

Geology & Drilling Conditions by Region

Oklahoma's geology varies dramatically across the state — from soft Permian red beds in the center to hard Ozark limestone in the northeast and sandy Ogallala formations in the Panhandle. The good news: decades of oil and gas exploration have mapped Oklahoma's subsurface more thoroughly than almost any state, and your installer can access existing well logs from the Oklahoma Geological Survey (OGS) database to reduce drilling uncertainty.

Pre-drill research tip: Oklahoma's oil and gas exploration has generated millions of well logs. The Oklahoma Geological Survey maintains a searchable database of subsurface data. Your installer (or you) can look up existing wells near your property to preview formation types and estimate drilling costs before getting quotes. This is a unique Oklahoma advantage — most states have far less subsurface data available.

Oklahoma Geology: Red Dirt and Drilling

The geology story in Oklahoma is simple: most of the state is easy and cheap to drill. The Permian red beds that cover central Oklahoma are soft, predictable, and drill quickly. The western plains are sandy and straightforward. Only the Ozark Plateau (harder limestone), Ouachita Mountains (folded formations), and Arbuckle Mountains (ancient granite) present meaningful drilling challenges — and even there, Oklahoma's drilling expertise keeps costs competitive.

For horizontal loops, Oklahoma's deep soils and abundant land in rural areas make it one of the best states in the country. A 3-ton horizontal slinky system that would cost $16,000–$22,000 in a tight-lot Northeast state can be installed for $10,000–$16,000 on Oklahoma acreage.

Oklahoma's Regulated Energy Market

Unlike Texas's deregulated ERCOT market, Oklahoma operates a traditional regulated utility model. You don't choose your electricity provider — it's determined by where you live. This creates predictable but generally low electricity rates.

Major Utilities

What the Regulated Market Means for Geothermal

Oklahoma's statewide average of 9.09¢/kWh makes it one of the cheapest electricity states in the country. That's good for consumers but challenging for geothermal payback in natural gas homes. The saving grace: Oklahoma's natural gas is also cheap, which means many rural homes that lack gas service are paying premium prices for propane — and those are the homes where geothermal shines.

The state's grid CO2 intensity sits at 673 lbs/MWh (EIA 2024, rank 31) — cleaner than the national average thanks to Oklahoma's massive wind energy buildout. Oklahoma generates approximately 40% of its electricity from wind, one of the highest percentages in the nation. This means a geothermal heat pump in Oklahoma is running on increasingly clean electricity.

Regional Costs & ROI

Installed System Cost by Region

Why Oklahoma costs less than national averages: Three factors. First, the oil and gas drilling infrastructure means competitive vertical bore pricing — drillers here have equipment, experience, and competition that other states lack. Second, land costs and labor rates are below national averages. Third, Oklahoma homes tend to be smaller than the national median, keeping system sizes moderate. A 3-ton system in Norman costs less than a 5-ton system in Houston.

Annual Savings by Fuel Replaced

Real-World Case Studies

Month-by-Month Energy Profile

Based on a 2,200 sqft home in Oklahoma City replacing propane heat + SEER 12 AC with a 3-ton geothermal system:

Annual total: Old system $4,560 → Geothermal $1,720 = $2,840 savings

Note: Unlike Texas (where summer drives the biggest savings) or Minnesota (where winter does), Oklahoma generates substantial savings in both seasons. January/February and July/August are nearly equal savings months — a sign that Oklahoma's balanced climate is ideal for geothermal.

Open-Loop System Assessment

Oklahoma sits atop several productive aquifer systems that can support open-loop geothermal installations. The Oklahoma Water Resources Board (OWRB) regulates all water wells in the state, and open-loop geothermal systems require specific permits.

OWRB Permitting for Open-Loop Systems

Oklahoma law requires a groundwater permit from the OWRB for any well that will produce more than domestic-use quantities. For open-loop geothermal:

• Domestic wells (under 5 acre-feet/year, roughly 4,400 GPD): No permit needed for household and domestic use — but open-loop systems that discharge water may trigger additional review.
• Return flow: Open-loop systems must have an approved discharge method. Options include: return well (reinjection), surface discharge to drainage (may require ODEQ permit), or irrigation use of discharge water.
• Well construction standards: All wells must be drilled by an OWRB-licensed well driller and meet the state's minimum well construction standards.
• Closed-loop systems do not require OWRB water permits since they don't produce or consume groundwater. A well permit is still needed for the borehole itself.

Contact the Oklahoma Water Resources Board early in your planning process if considering open-loop. Their staff is generally helpful and can advise on permit requirements for your specific location and aquifer.

Loop Type Cost Comparison

Oklahoma pond loop advantage: Oklahoma has over 200 reservoirs and lakes, plus countless farm ponds across cattle country. If your property has a pond of at least ½ acre and 6+ feet deep within a reasonable distance of the house (under 200 feet is ideal), a pond loop is almost always the cheapest and most efficient option. The pond's thermal mass acts as a natural heat exchanger, and Oklahoma's ponds generally maintain adequate temperatures year-round.

Incentives: Federal ITC and the Honest Picture

Oklahoma has no state tax credits, no state rebates, and no mandatory utility energy efficiency programs that specifically target ground-source heat pumps. The state does not have a renewable portfolio standard that includes geothermal heat pumps, and the Oklahoma Corporation Commission (which regulates utilities) has not mandated efficiency incentive programs for GSHP adoption.

Your sole incentive is the federal Residential Clean Energy Credit (IRC §25D):

• Credit amount: 30% of total installed cost (equipment + labor + drilling)
• No cap on credit amount
• Applies through 2032 (steps down to 26% in 2033, 22% in 2034)
• System requirements: Must meet ENERGY STAR criteria at time of installation
• Carryforward: If your tax liability is less than the credit, unused portion carries forward to future tax years

For a typical Oklahoma installation of $22,000, that's a $6,600 credit — reducing net cost to $15,400.

Important note about Oklahoma state income tax: Unlike Texas, Oklahoma does have a state income tax (0.25–4.75% graduated). While there is no state geothermal tax credit, having state income tax means you're likely to have sufficient federal tax liability to absorb the 30% ITC in 1–2 years — a practical advantage over Texas homeowners who sometimes face carryforward issues.

Incentive Stacking Table

Rural Electric Cooperatives: The Hidden Incentive

Oklahoma has 27 electric distribution cooperatives serving rural areas. While the major investor-owned utilities (OG&E, PSO) don't offer geothermal rebates, some cooperatives do offer HVAC efficiency incentives. These vary by co-op and change over time, but are worth investigating:

• Contact your specific cooperative's member services department
• Ask about heat pump rebates, energy efficiency loans, or on-bill financing
• Some co-ops have offered $200–$1,500 for ENERGY STAR heat pump installations
• The Oklahoma Association of Electric Cooperatives (OAEC) may have current program information

USDA REAP: Oklahoma Farmers' and Ranchers' Advantage

Oklahoma's agricultural economy makes USDA REAP particularly relevant. If your property qualifies (rural location, agricultural operation, or small business), you can receive:

• Grant: Up to 25% of project cost
• Guaranteed loan: Up to 75% of project cost
• Combined with 30% ITC: Up to 55% of total cost covered

Example — Canadian County cattle ranch:

• 3-ton system for ranch house: $20,000 installed
• USDA REAP grant (25%): −$5,000
• Federal ITC (30% of $15,000 remaining): −$4,500
• Net cost: $10,500 (48% reduction)
• Annual savings (replacing propane): $2,400
• Payback: 4.4 years

Contact the USDA Oklahoma State Office for current application cycles and deadlines.

Oil Country Drilling Advantage

Oklahoma is the 5th-largest oil-producing and 3rd-largest natural gas-producing state in the nation. This legacy has created something invaluable for the geothermal heat pump industry: a deep pool of drilling expertise and equipment that other states simply don't have.

How Oil & Gas Infrastructure Benefits Geothermal

• Drilling equipment availability: Oklahoma has hundreds of drilling rigs and service companies. A geothermal vertical bore (150–300 feet) is trivial compared to oil wells (5,000–15,000+ feet). Many drilling companies offer geothermal boring as a side business, driving competitive pricing.
• Experienced operators: Oklahoma drillers understand subsurface geology, well completion, grouting, and casing — skills that directly transfer to geothermal loop installation. Less learning curve means fewer mistakes and faster installations.
• Competitive pricing: With more drilling companies per capita than almost any other state, Oklahoma benefits from market competition. Vertical bore costs in Oklahoma typically run $10–$16/ft vs. the national average of $15–$22/ft.
• Geological knowledge: Oil and gas exploration has thoroughly mapped Oklahoma's subsurface geology. Your installer can often access existing well logs and geological surveys for your area — reducing uncertainty in loop design and eliminating surprises during drilling.

The practical impact: A 3-bore vertical loop system that might cost $24,000 in a Northeastern state often comes in at $15,000–$20,000 in Oklahoma, purely because of drilling competition and expertise. This single factor can knock 2–4 years off your payback period.

Finding Drillers Who Do Geothermal

Many Oklahoma water well drillers and small oil field service companies will bore geothermal loops. However, the drilling is only part of the job — the loop design, heat pump selection, and system commissioning require HVAC and geothermal expertise. The ideal installer either has both skillsets in-house or works with a drilling subcontractor who follows their specifications exactly.

Tornado Resilience: The Underground Advantage

Oklahoma averages 56 tornadoes per year — among the highest in the nation. The state has experienced some of the most powerful tornadoes ever recorded, including the 1999 Bridge Creek-Moore EF5 (301 mph winds) and the 2013 Moore EF5 that killed 24 people and destroyed 1,150 homes.

Geothermal offers a unique resilience advantage in Tornado Alley:

What Survives a Tornado

The real-world scenario: After a severe tornado damages your home but doesn't destroy it (the most common outcome for homes in the damage path but not direct hit), a conventional system likely needs a full outdoor condenser replacement — a $3,000–$8,000 expense during a time when HVAC contractors are overwhelmed with demand. A geothermal system's ground loop is completely unaffected, and the indoor unit is protected. Getting your HVAC back online after repairs is dramatically faster and cheaper.

For Oklahoma homeowners who've lived through tornado damage or near-misses, this resilience factor carries real weight — even if it's hard to quantify financially.

Hail Damage

Oklahoma also experiences significant hail events. Conventional outdoor AC condensers are vulnerable to hail damage — bent fins, punctured refrigerant lines, and damaged fan motors are common insurance claims. A geothermal system's indoor installation eliminates this exposure entirely. Over a 25-year system life, avoiding even one hail damage repair ($500–$3,000) helps the payback math.

New Construction Economics

If you're building new in Oklahoma, geothermal economics are dramatically better than retrofit. Here's why:

The Incremental Cost Advantage

Every new home needs an HVAC system. The question isn't "should I spend $24,000 on geothermal?" — it's "should I spend an extra $8,000–$12,000 for geothermal instead of conventional?"

After the 30% ITC on the geothermal system, the incremental cost drops to $3,000–$6,000. With annual savings of $900–$1,500 over conventional (even with cheap Oklahoma gas), the incremental payback is typically 3–6 years.

Builder Advantages

• Trenching is already happening: During new construction, excavation equipment is already on site for foundation, plumbing, and electrical. Adding horizontal loop trenching is minimally incremental.
• No retrofit disruption: Landscaping, driveways, and finished yards don't exist yet. No restoration costs.
• Mortgage financing: The geothermal system cost rolls into the construction loan/mortgage at 6–7% interest rather than requiring a separate home improvement loan at 8–12%.
• Better load calculation: The builder's HVAC design is done from scratch, allowing optimal sizing. Retrofit systems often deal with existing ductwork limitations.

If you're building in tornado-prone areas like Moore, Norman, or Joplin-adjacent northeast Oklahoma, the underground resilience factor adds practical value to the financial case.

How to Claim the Federal Tax Credit

Permits & Licensing

Oklahoma's permitting process for geothermal is among the simplest in the country. No special "geothermal system permit" exists — the existing well drilling and HVAC frameworks cover everything. Here's what's required:

Contractor Licensing

Permit Requirements by Type

County-by-County Notes

Typical Project Timeline

Oklahoma's regulatory advantage: Compared to states like New York, California, or even neighboring Colorado, Oklahoma's permitting process is remarkably straightforward. No environmental impact assessments, no special geothermal permits, no coastal zone reviews, no historic preservation reviews. The existing well drilling and HVAC frameworks cover everything. Rural properties in unincorporated counties may need only the OWRB well permit — nothing else.

Finding & Vetting an Oklahoma Installer

Oklahoma's geothermal installer network is unique: the oil and gas drilling infrastructure provides a deep bench of experienced drillers, and IGSHPA's headquarters at Oklahoma State University means a high concentration of trained professionals. The challenge is finding contractors who combine drilling capability with proper geothermal design expertise.

Where to Find Installers

• IGSHPA Certified Installer Directory — the gold standard. IGSHPA HQ is at OSU, so Oklahoma has more certified professionals than most states.
• WaterFurnace Dealer Locator — authorized dealers with manufacturer training
• ClimateMaster Dealer Locator — ClimateMaster is headquartered in Oklahoma City, giving OK strong dealer representation
• Bosch Dealer Locator
• GeoExchange / Geothermal Exchange Organization
• CIB License Lookup — verify any contractor's mechanical license status
• Rural electric co-op referrals — many OK co-ops maintain lists of contractors who've installed geothermal in their service territory

Regional Installer Availability

8-Point Vetting Checklist

1. IGSHPA certification — In Oklahoma, there's no excuse for a geothermal contractor not to have it. IGSHPA HQ is at OSU in Stillwater.
2. CIB mechanical contractor license — verify at ok.gov/cib. Active license, no disciplinary actions.
3. OWRB well driller license — either held directly or a documented subcontractor relationship with a licensed driller.
4. Minimum 10 residential systems installed — ask for a reference list. OK geology varies; an OKC installer may lack Ozark limestone experience.
5. Design software — should use LoopLink RLC, GLD, or GLHEPro for loop sizing. "Rules of thumb" or "we always do 200 feet per ton" is a red flag.
6. Written Manual J load calculation — refuse anyone who sizes by "square footage rule of thumb." Demand the calculation.
7. Antifreeze specification — should specify food-grade propylene glycol concentration for OK's climate (typically 15–20% for central OK, 20–25% for Panhandle).
8. Warranty terms in writing — separate warranties for equipment (5–10 yr), compressor (10 yr), and ground loop (25–50 yr). Understand registration requirements.

Red Flags

• No IGSHPA certification despite operating in Oklahoma (IGSHPA HQ state)
• Can't provide 5+ local references with verifiable contact info
• "One-size-fits-all" pricing without site visit or load calculation
• No familiarity with your specific region's geology
• Refuses to quote multiple loop types for comparison
• No ClimateMaster, WaterFurnace, or Bosch dealer authorization
• Driller has oil/gas experience but no geothermal-specific training (grout requirements differ)

The ClimateMaster advantage: ClimateMaster is headquartered in Oklahoma City, making Oklahoma one of the best-supported states for this major geothermal brand. ClimateMaster dealers in OK often have direct factory relationships, access to training, and faster warranty service than dealers in other states.

Get at least 3 quotes. Oklahoma's installation costs vary by region, geology, and whether the contractor has their own drilling equipment. A system quoted at $28,000 in Tulsa's limestone might come in at $20,000 in Enid from a driller who also does geothermal.

Maintenance & System Longevity

Geothermal systems have far fewer moving parts than conventional HVAC and no outdoor equipment exposed to Oklahoma's extreme weather — hail, ice storms, dust, tornadic winds. Here's the maintenance schedule and what to expect over the system's lifetime.

Recommended Maintenance Schedule

Component Lifespan

The Oklahoma longevity advantage: Geothermal's indoor-only equipment placement is a genuine advantage in Tornado Alley. No outdoor condenser to replace after hailstorms ($2,000–$5,000 per incident for conventional AC), no ice-storm damage to outdoor coils, no tornado debris. Over a 25-year ownership period, avoiding 2–3 hail damage events alone can save $4,000–$15,000 in repair/replacement costs that aren't captured in standard payback calculations.

Second-generation savings: When the indoor heat pump equipment eventually needs replacement (year 20–25), the ground loop is still there. Your second system costs only $6,000–$10,000 for equipment replacement — essentially a conventional HVAC replacement price — but you get geothermal efficiency for another 20+ years. This is the hidden long-term value of geothermal.

Vacation Rental & Lake Property Economics

Oklahoma's lake country and tourism destinations create a compelling geothermal case for vacation rental and investment properties — where energy costs are especially variable and marketing advantages matter.

Oklahoma Lake Country

Oklahoma has more man-made lakes than any other state — over 200 — and lakefront property is a major vacation rental market:

• Grand Lake O' the Cherokees (NE Oklahoma): Premium vacation rental market. Ozark limestone geology = excellent ground loop performance. Cabins renting $200–$500/night can market "geothermal heated and cooled" as a premium amenity. Propane-heated lakefront properties see 6–9 year payback.
• Lake Texoma (South-Central): Shared with Texas. Red bed geology, easy drilling. High summer cooling demand. Properties with both heating and cooling needs see balanced year-round savings. Typical rental: $150–$350/night.
• Broken Bow Lake / Beavers Bend (SE Oklahoma): Fastest-growing vacation rental market in Oklahoma. Luxury cabins $250–$600/night. Ouachita Mountain geology — get site-specific assessment. Hot tub desuperheater integration is a selling point. Many cabins on propane — the replacement case is strong.
• Lake Eufaula (East-Central): Cross Timbers geology, easy drilling. Moderate rental market. Properties often on propane or electric resistance — strong geothermal case.
• Turner Falls / Arbuckle area: Smaller market but growing. Limestone geology, good loop performance. Day-trip tourism is evolving into overnight rental market.

Vacation Rental Math

Vacation rentals benefit from geothermal in ways that primary residences don't always capture:

• Unoccupied efficiency: Geothermal maintains set-back temperatures more efficiently than propane or electric resistance during vacant periods. A cabin that's unoccupied 60% of the year still saves on maintaining 55°F in winter.
• Marketing premium: "Eco-friendly, geothermally heated and cooled" is a genuine differentiator on Airbnb/VRBO in Oklahoma's competitive lake cabin market. Early data suggests $15–$40/night premium for eco-marketed properties.
• Propane elimination: No propane delivery logistics for remote cabins. No tank rental. No price volatility. One electric bill.
• Hot tub efficiency: Desuperheater provides essentially free hot water during cooling season — significant for cabins with hot tubs that are a major energy draw.
• Tax treatment: Rental properties qualify for the 30% ITC under §25D (if you use the property 14+ days/year) or the §48 commercial credit. MACRS 5-year accelerated depreciation may also apply. Consult your tax advisor.

Oklahoma vs. Neighboring States

Oklahoma's position among its neighbors is interesting: it has the cheapest electricity (bad for geothermal payback), but also the lowest installation costs (good for payback), the most balanced climate (both heating and cooling savings), and IGSHPA headquarters in its backyard. None of the neighboring states offer state-level geothermal incentives either, so Oklahoma isn't at a policy disadvantage.

The biggest difference: Colorado's higher electricity rates (13.93¢/kWh) make geothermal payback faster despite higher installation costs. Kansas is the closest comparison to Oklahoma in terms of climate, geology, and economics. Missouri and Arkansas have more moderate climates with less heating demand, which somewhat reduces the geothermal value proposition.

Frequently Asked Questions

Bottom Line

Oklahoma is a geothermal state that doesn't know it yet. The raw economics face headwinds from cheap gas and cheap electricity — but Oklahoma has structural advantages that offset those headwinds in the right situations:

• Rural propane homes: 6–10 year payback, with USDA REAP potentially cutting that to 4–6 years. This is Oklahoma's geothermal sweet spot.
• New construction: 3–6 year incremental payback. If you're building anyway, geothermal should be on every bid.
• Farm and ranch properties: Pond loops (cheapest installation), REAP eligibility, and propane replacement = the best geothermal economics in Oklahoma.
• Oil country drilling advantage: Lower-than-average drilling costs thanks to the oil and gas workforce. This knocks 2–4 years off payback compared to states without drilling infrastructure.
• Tornado resilience: Your most expensive HVAC component is underground and tornado-proof. In Moore, Norman, and Tornado Alley, that matters.
• IGSHPA headquarters: Oklahoma State University's IGSHPA program gives the state a uniquely strong pool of trained geothermal professionals.
• Balanced climate: Significant heating AND cooling loads mean savings in both seasons — unlike states that only benefit in one mode.

Where it doesn't make sense: existing homes in OKC or Tulsa with modern gas furnaces and working AC systems. The $600–$800/year savings on a $18,000–$26,000 net investment (after ITC) means 22+ year payback. Wait until your system dies, then compare geothermal quotes against conventional replacement — the incremental math is much better.

Get three quotes minimum. Verify IGSHPA certification (there's no excuse in Oklahoma). Ask about loop type options for your specific geology. And if you're on propane with a farm pond, stop reading and start calling installers.

Last verified: March 2026. EIA rate data: 2024 annual average. Federal tax credit status: confirmed through 2032 per IRC §25D. OWRB regulations current as of publication.

Sources

1. U.S. Energy Information Administration — Oklahoma Electricity Profile 2024
2. U.S. Energy Information Administration — Oklahoma Natural Gas Prices
3. ENERGY STAR — Geothermal Heat Pumps Tax Credit
4. IRS — Form 5695: Residential Energy Credits
5. Oklahoma Water Resources Board — Well Drilling and Groundwater Permitting
6. Oklahoma Construction Industries Board — Mechanical Contractor Licensing
7. USDA Rural Development — Rural Energy for America Program (REAP)
8. IGSHPA at Oklahoma State University — International Ground Source Heat Pump Association
9. NOAA — Climate Data: Norman, OK Weather Forecast Office
10. Oklahoma Geological Survey — Subsurface Geology Resources
11. U.S. DOE — Geothermal Heat Pumps Technical Reference
12. DSIRE (Database of State Incentives for Renewables & Efficiency) — Oklahoma Incentive Programs
13. WaterFurnace — Dealer Locator and Product Specifications
14. ClimateMaster (Oklahoma City HQ) — Residential Dealer Locator
15. Bosch Thermotechnology — Geothermal Heat Pump Dealer Locator
16. GeoExchange (Geothermal Exchange Organization) — Industry Resources and Installer Directory
17. NREL (National Renewable Energy Laboratory) — Solar and Energy Resource Maps for Oklahoma
18. Oklahoma Corporation Commission — Utility Rate Filings and Service Territories
19. NOAA National Weather Service — Tulsa Weather Forecast Office — Oklahoma Climate Data