Air handling unit
Heko forward curved centrifugal fans and backward curved centrifugal fans are widely applied in AHU all over the world. Air handling unit (often abbreviated to AHU), is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system.

Heat Recovery System
Heat recovery ventilation (HRV) is an energy recovery ventilation system using equipment which employs a cross flow or counter-flow heat exchanger (countercurrent heat exchange) between the inbound and outbound air flow.