Their main advantage is the utilization in premises where forced ventilation is required. Ventilation can be thus combined with heating. Investment costs for hot-water heating system distribution are reduced; useful plan coverage area is maintained, operating energy demands are lower.

Their main advantage is the utilization in premises where forced ventilation is required. Ventilation can be thus combined with heating. Investment costs for hot-water heating system distribution are reduced; useful plan coverage area is maintained, operating energy demands are lower.