Heat-fab, manufacturer of high-performance products for the hearth and heating industries, celebrated its 25th anniversary in June by sponsoring a community open house. Heat-fab was founded in Greenfield, Mass., in 1978 by Lloyd and Millie Green, both of whom are still active in the company. Their son, Harold Green, has directed Heat-fab’s day-to-day operations as president since 1999. Heat-fab moved to the Turners Falls Industrial Park facility in 1997 and currently employs approximately 100.