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ThermAll Heating, Cooling & Electric has served Yakima and Kittitas Counties for more than 30 years, offering geothermal installation, replacement, repair, and routine maintenance alongside a full HVAC and electrical service menu. Their geothermal page explicitly distinguishes ground-source systems from air-source alternatives: ThermAll's geothermal installations use the earth's stable subsurface temperature rather than ambient outdoor air, providing more consistent efficiency across eastern Washington's cold winters. The company operates from offices in both Yakima and Ellensburg, positioning it to cover a large stretch of central Washington. Emergency HVAC service is available outside normal business hours. ThermAll's dual-city footprint makes it one of the few contractors able to serve both the Yakima Valley and the Kittitas/Ellensburg corridor from established local offices.
Verified active operator per https://www.thermallheating.com/air-conditioning/geothermal-heating-and-cooling (WA import 2026-06-02)
ThermAll Heating, Cooling & Electric installs ground-source geothermal heat pumps in Yakima and Ellensburg WA. 30+ years serving central Washington.
Service Details
schedule
Years in Business
30 years
factory
Brands Installed
Service Area
Serves 13 areas across Washington
YakimaEllensburgCle ElumSelahGrangerKittitasMoxeeNachesRoslynTietonToppenishWapatoZillah+1 more
Regulatory Context
Geothermal Permitting in Washington
Geothermal heat pump installations in Washington require specific permits and compliance with state regulations regarding well drilling, loop installation, and refrigerant handling. Contact your local building department for specific requirements in your area.
How much does geothermal installation cost in Yakima, Washington?add
Geothermal heat pump installation in Yakima typically costs between $18,000–$45,000 depending on system size, loop type (vertical vs. horizontal), lot conditions, and home square footage. Available state and utility incentives can reduce net cost (federal §25D credit ended Dec 31, 2025 under OBBBA; §48 commercial ITC may still apply). Request quotes from multiple certified installers in Washington to compare pricing.
Do I need a permit for geothermal drilling in Washington?add
Most Washington municipalities require permits for geothermal well drilling and ground loop installation. Requirements vary by county — some require driller licensing, environmental impact review, or water well permits. Your geothermal installer should handle the permitting process. Contact your local Yakima building department for specific requirements.
How long does a geothermal system last in Yakima?add
Geothermal heat pumps typically last 20–25 years for the indoor unit and 50+ years for the ground loop. In Yakima's climate, a properly maintained system provides reliable heating and cooling with minimal degradation. Annual professional maintenance and filter changes every 3 months help maximize system lifespan.
Is my property in Yakima suitable for geothermal?add
Most properties in Yakima, Washington can support geothermal systems. Vertical loop systems require minimal land area (as little as a standard residential lot), while horizontal loops need more yard space. A qualified installer will conduct a site assessment including soil conductivity testing to determine the best loop configuration for your property.
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If you need to reach ThermAll Heating, Cooling & Electric directly: (509) 248-8368
Geothermal heat pump installations in Washington may require drilling permits, environmental site assessments, and compliance with local well and thermal energy regulations. Requirements vary by jurisdiction and system type (vertical, horizontal, open-loop). Contact your local municipality, state energy office, or a licensed geothermal installer for specific permitting requirements in your area.
