Geothermal.contractors

A+ Derr Heating & Cooling is a fourth-generation, family-owned HVAC contractor with over 50 years of service to the Kentuckiana region. Operating from Louisville, Kentucky, and Newburgh, Indiana, the company offers geothermal system installations and replacements, alongside repair and twice-yearly maintenance programs. Their dedicated geothermal page describes evaluating whether horizontal or vertical ground loops make sense for each site, including soil-condition assessment and access points for drilling or trenching — indicating real loop-side design work, not product-line upselling. A+ Derr holds Lennox Premier Dealer status and multi-state licensing in Kentucky (HM06269) and Indiana (HAC31423), serving residential and light-commercial customers across the region. The Louisville office at 1225 Gardiner Lane is the primary Kentucky service address. Verified active operator per https://aplusderr.com/heating/geothermal/ + BBB Newburgh IN profile (KY HOLD-upgrade import 2026-05-28)