The “ROTEX Compact Class” lives up to its name. Measuring just 0.36m² or 0.62m², it includes a complete heating system, water boiler and a 300- or 500-liter solar stratified storage tank. The heating system combines heat pump technology and hygienic water heating in a single, small unit. The integrated heat-storage device is also suitable for use with solar collectors. The solar back-up space heating unit is built directly into the 500-liter model.