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Hentkowski Inc. has served the greater Wilmington area since 1968, making it a 57-year family business founded by Barbara Roberts and the Hentkowski family, now spanning three generations including John and Stephen Hentkowski. The company is a NATE-certified Carrier authorized dealer and a member of the Plumbing-Heating-Cooling Contractors Association (PHCC). Hentkowski provides geothermal heat pump installation for residential and commercial clients throughout northern Delaware.
Family-owned NATE-certified Carrier dealer in Wilmington since 1968 — three generations of Delaware HVAC leadership.
Geothermal heat pump installations in Delaware 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 Wilmington, Delaware?add
Geothermal heat pump installation in Wilmington 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 Delaware to compare pricing.
Do I need a permit for geothermal drilling in Delaware?add
Most Delaware 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 Wilmington building department for specific requirements.
How long does a geothermal system last in Wilmington?add
Geothermal heat pumps typically last 20–25 years for the indoor unit and 50+ years for the ground loop. In Wilmington'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 Wilmington suitable for geothermal?add
Most properties in Wilmington, Delaware 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 Hentkowski Inc. directly: (302) 998-2257
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Geothermal heat pump installations in Delaware 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.