Air Diffusion Agencies (ADA) is a renowned Australian manufacturer of state of the art accessories and technologies to provide you with a comprehensive range of components for your heating, ventilating, and/or air-conditioning (HVAC) system. We are the leading Australian supplier of quality air conditioning equipment and refrigeration components to the industry, and a holder of several patented products. We offer a complete range of products including air diffusers, flexible ducting, fittings, ductboard, sheetmetal, zoning equipment, combustion heating components, spare parts and units. We are a proudly 100% Australian family owned and managed company that is market driven by our valuable customers to design and provide innovative products that will meet your needs today, and in the future.