Joel Key has joined Raleigh, N.C.-based Healthy Home Diagnostics (HHD) as general manager of the indoor air quality solution company.

Key brings to the company 20 years of experience as an HVAC, plumbing and refrigeration contractor and 13 years of experience as a state-licensed contractor. He developed a pilot training program for weatherization technicians that lead to the state-approved training procedure used in North Carolina.