"Good acoustics" is usually the target in room acoustics. The meaning of this depends on the type of room and the intended use. Rooms for musical presentations need a good sound quality at as many seats as possible while lecture halls demand good intelligibility of the teaching person. In case of open-space offices a productive working environment should be ensured. This can mean a focused individual work or a good communication between workers within the same team. CadnaR offers the tools to efficiently handle any of these room acoustic situations and guides you through setting up your acoustic model and assigning reasonable absorption, scattering and transmission properties. Sound pressure levels, reverberation time, speech transmission index (STI) and further psychoacoustic parameters allows you to assess the acoustic quality according to the appropriate standards or cutting-edge assessment approaches.