Gas-fired water heaters Termica PSW with a heating coil, they allow water to be heated all year round. The built-in coil enables connection to central heating boiler, which in winter is used to heat water, while in summer the water is heated by its own built-in gas burner. Heater is equipped with several safety devices which allow safe use, such as a device that cuts off the gas supply when flame goes out, a chimney draught sensor with a limiter which protects heater against water boiling.

To protect heater itself it is equipped with a safety valve. Heater itself is fired with natural gas. When one device is not sufficient to meet the hot water demand, several devices can be connected in series in batteries.