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An air handling unit AHU is a unit that helps to maintain indoor temperature and air flow in high quality. Swegons GOLD and SILVER C RX units are designed for comfort ventilation. To ensure superior performance Swegon designs its own components such as the rotary heat exchanger fan impeller and control equipment. Units with rotary heat exchangers allow to achieve the ultimate in temperature and annual energy efficiency heat exchangers with turbulent air flow are uniquely effective. This combined with the short installation length typically makes them the first choice for most applications. The turbulent flow in the rotor and the Carry Over Control feature make them ideally compatible with VAV and DCV system applications. Swegons GOLD and SILVER C RX units are designed to minimize the risk of air and odor transmission between the air flows. The reference unit weight of a Swegon AHU in size 070 080 is 2482 kg however the weight can differ between different configurations. In terms of material content an AHU consists primarily of steel aluminium different types of polymer materials insulation materials and electronic components. AHUs are expected to be used for 20 years before they reach the end of life.