The complete LWZ 304/404 SOL heat pump and ventilation system was designed especially for energy-efficient houses. It is used to supply heating, ventilation and hot water, in particular in houses with an almost airtight building envelope. In addition to these fundamental characteristics, the appliance also has an integrated cooling function to reduce room temperatures in summer. The ergonomic layout of the operating panel makes it simple for all users to handle. A swivelling front casing allows for easy access to the main components when maintenance work is needed and continues the ergonomic concept. The superior design is characterised by clean, striking lines. Distinct contrasts in materials and finishes as well as the rounded, fluid style lend the product dynamics and elegance. The use of superior aluminium finishes ensures that the appliance is long-lasting both mechanically and in terms of style.