Expansion moves KSA closer to becoming one of the Mid-Atlantic’s largest PHVAC manufacturers’ rep (Pottstown, PA – September 26, 2018) At the start of 2018, Keystone Sales & Associates (KSA) owner and CEO, Bob Della Sala, said that the company was dedicated to quickly becoming one of the Mid-Atlantic region’s largest PHVAC manufacturers’ representative. The… Full Article