Since 1966, R.P. O'Connell, Inc. has served Massachusetts, New Hampshire and Rhode Island in the sale of commercial heating, ventilation and air conditioning equipment and direct digital control (DDC) systems. Representing over thirty different manufacturers of the highest quality HVAC equipment and controls, our sales engineers have the ability and experience to assist owners, architects, engineers and contractors with the selection, application, installation and service of mechanical equipment and building control systems.