In centralized residential ventilation, one device controls the supply and exhaust air via piping systems in relevant rooms of the residential building. The advantage of a centralized unit is that heat recovery and air filtering are effectively implemented. The centralized control system also enables evenly regulated air distribution and optimization across the entire building.

The RadiCal has proven itself for over 10 years in use in centralized domestic ventilation units and is now in its second generation with impressive noise and efficiency levels. Aerodynamic optimizations include its “twisted” blade geometry and the completely revised housing box with diagonally arranged struts. Compared to its predecessor, the RadiCal 2 has a 9 percent higher peak efficiency level in size 190, for example. In addition, the maximum air flow per size is considerably higher. The noise level has been significantly improved and is up to 3 dB (A) lower depending on the operating point. Thanks to the new FlowGrid and the revised EC motors, additional noise benefits can be achieved in the ventilation unit.

The RadiCal fan in scroll housing continues to set new standards in ventilation technology. Users don’t need their own air duct design as the round outlet is connected to the ventilation unit’s air ducts. The vane anemometer in the outlet of the scroll housing enables automatic control to provide a constant air flow. This makes it suitable for smart ventilation, which ensures a predefined air exchange in living spaces. This vane anemometer is now also available in 4 sizes as a single sensor for installation in ventilation systems.

With its integrated vane anemometer, the RadiCal not only functions as a powerful fan, but also as a smart sensor. When combined with an appropriate control system and software, it can precisely monitor the pollution degree of filters in a residential ventilation system and issue a timely warning message to replace them. This not only ensures good air quality, but also enables further potential energy savings, while at the same time avoiding additional costs for other pressure sensors in the ventilation system. Compared to centrifugal blower fans of the same design, the RadiCal in scroll housing is 34 percent more efficient and up to 3.5 dB (A) quieter. The integrated humidity and temperature sensors make the RadiCal in scroll housing particularly suitable for residential ventilation systems – a further step toward measurable indoor air quality.