Geothermal Well Drilling in Union County, NC

Geothermal heat pumps use closed loops in vertical boreholes to exchange heat with the ground. In Union County, Environmental Health permits private, irrigation and water-producing geothermal wells (summary). Check with the county about permitting for closed-loop boreholes.

Questions to ask

• How many boreholes and how deep, based on the HVAC load calculation?
• Who coordinates the driller and the HVAC installer?
• Grouting method and permit responsibilities
• Eligibility for federal or utility incentives (check current rules; they change)

Geothermal costs vary widely with system size. Get itemized quotes from both the HVAC contractor and the driller.