In 1960, Patrick J. Kennedy & Sons expanded to provide heating and air conditioning services and has since installed thousands of systems in buildings ranging from multi-story apartments and condominiums, to schools and universities. The company is bonded in excess of $40 million, and has completed projects ranging from $5,000 to $25 million. Patrick J. Kennedy & Sons is proud to be a union contractor signatory to Pipefitters Local 537 in Boston.