Geothermal.contractors

David Armstrong Jr Services, LLC has provided heating and cooling service to Washington County and the northeastern North Carolina coastal plain since 1974, founded by David Durwood Armstrong and now operated by his son. Based in Columbia, NC, the company handles residential and commercial HVAC installation, maintenance, and repair across a service area stretching from Washington County to the Outer Banks corridor. Their commercial systems capabilities include water-sourced geothermal heat pump installations, along with rooftop units, split systems, and make-up air units. The company holds a North Carolina HVACR contractor license (no. 21460) and offers 24-hour on-call emergency service. Brands serviced include York, Carrier, Trane, and Comfortmaker. Armstrong's decades of experience in the region's mixed-coastal climate give them practical familiarity with the humidity and temperature swings that define eastern NC HVAC demand. Verified active operator per https://armstrongheatingandair.com/index.php/commercial-systems/ + https://www.bbb.org/us/nc/columbia/profile/heating-and-air-conditioning/david-armstrong-jr-services-llc-0593-90070599 (Bundle 6 audit 2026-05-29)