Unit description Autonomous reversible air-to-air Rooftop unit, for the thermo-hygrometric treatment, filtration and air renovation, depending on the selected configuration. Mini WSM units are specifically designed for installation in small to medium sized spaces, such as shops, bars and service areas. Hermetic rotary scroll compressors with R410A refrigerant; single refrigerant circuit; aluminum structure and coated galvanized steel base; air treatment section with sandwich panel and centrifugal fans. According to the selected version, the unit allows for the management of free cooling, with supply and return fans with motorized dampers for return, expulsion and fresh air. The unit is also available with the heat recovery Refrigerant Booster to recover the energy from the exhaust air, increasing the units capacity and the global efficiency. Configurations AR - Air recirculation function MF - Mixing and Free cooling function CE - Centrifugal Extraction/Expulsion and Free cooling function HR - Heat recovery function