What are the characteristics of home tap water heating system?

1, open system: do not need to set up a safety valve or closed expansion tank, only need to set up a high cold water tank and expansion pipe or high form of heating water tank and other accessories. Pipe network connected to the atmosphere, the water pressure in the system depends mainly on the height of the water tank is set up, but not subject to fluctuations in water pressure outdoor water supply network, the system operates safely, reliably and stably. Its biggest drawback is that the high water tank occupies space, open water tank water quality is susceptible to external pollution. Suitable for hot water users who require stable water pressure and are allowed to set up a high level tank.

2, closed system: pipe network is not connected to the atmosphere, cold water directly into the water heater. The system requires a safety valve, diaphragm pressure expansion tank or expansion tube, automatic exhaust valve and other accessories to ensure safe operation of the system. Due to the poor stability of the system water supply pressure, poor safety and reliability, generally applicable to the hot water supply system without setting the roof tank.