What the Tech: Why are air handling units (AHUs) impor­tant for a healthy indoor climate?

There are any number of different AHUs. They vary according to the purpose for conveying the air. In general, they are designed to regu­late the quality and temper­a­ture of supplied air. Areas of appli­ca­tion include rooftops and tech­nical floors of large build­ings, such as resi­den­tial complexes and indus­trial build­ings, with a high demand for fresh air.

Their mode of oper­a­tion is rela­tively simple: Outside air is drawn in, filtered and appro­pri­ately handled, for example heated or humid­i­fied, and is then trans­ported via ducts to the desig­nated room. An inte­grated heat exchanger prevents warm air from leaving the building, which saves energy costs. Addi­tional energy can be saved by installing highly effi­cient fans with EC motors. With effi­cien­cies of well over 90 percent, these are far above the values of the Euro­pean effi­ciency class IE5.

To accom­mo­date different instal­la­tion situ­a­tions, centrifugal fans are avail­able in stan­dard or short versions, for example. The space-saving instal­la­tion of an EC FanGrid not only saves energy, but also ensures oper­a­tional reli­a­bility.