The heating, ventilation, and air conditioning industry refers to the technology of indoor temperature control. A sub-discipline of mechanical engineering, HVAC systems are crucial in the design of residential as well as commercial structures. These systems control the temperature, and also the quality of the air that gets circulated, by replacing or exchanging the air in a particular space. Heating, cooling and ventilation systems require high-quality, precision-engineered parts, such as those manufactured by Proco Products, Inc. Proco operates worldwide, and maintains one of the largest product inventories in North America. For more information on expansion joints and check valves from Proco Products, Inc. and to check pricing and availability, contact us today. For an interactive PDF Applications Form, click here.