CT W9 Limited Direct Exchange Geothermal Contractor Certification Exam

CT W9 Limited Direct Exchange Geothermal Contractor Connecticut’s geothermal sector relies on specialists who understand direct exchange systems—where refrigerant circulates through ground loops instead of water. The W9 credential certifies contractors qualified to design, install, and maintain these efficient heat pumps, serving residential and light commercial projects across the state’s growing renewable energy market.