Closed System Water Heater

Some new water meters also have a check valve.

Closed system water heater.

Closed systems are often used in second homes or primary residences in areas prone to long power outages. Closed loop solar heating system here s how a solar powered water heater works. The valves that are usually found in the closed systems are the check valve pressure reducing valve mixing valve backflow preventer and other. All water heaters waste heat energy even when the burner is off and the unit is sitting idle between heating cycles.

A closed water heater system means that the hot water cannot expand beyond the valves and mix with the municipal water. The heated water then flows into the storage tank before it s channeled into the heat exchanger. In a closed system the extra water volume that results from heating puts stress on other parts of the plumbing system and can result in broken pipes leaky taps relief line leaks or a damaged or leaking water heater. Closed loop solar water heater systems sometimes referred to as anti freeze or glycol systems include the heat collectors insulated piping a circulating pump an expansion tank a hot water storage tank a heat exchanger solar fluid usually a solution of water and nontoxic propylene glycol antifreeze a controller valves and gauges.

The heating fluid is self contained within the system and stays there unless removed for maintenance completely separate from the domestic hot water. Radiantec s closed system uses a high efficiency water heater or boiler to heat water or another heating fluid such as anti freeze. When water heats it expands. The down side is two heat sources.

A boiler is a device used to heat a home using steam and radiant heat techniques and is a closed system which rarely replenishes its supply of water from an external source. A closed system is created when there is a check valve between the water heater and the city water main. When radiant heat is called for by the thermostat a pump comes on and circulates the warm water throughout the radiant floor until the thermostat is satisfied. Closed feedwater heaters in case of closed feedwater heaters extracted steam or bled steam will not be mixed with feedwater.

A water heater heats water that is constantly being replenished since it is connected to taps.