Closed System Water Heater

Closed feedwater heaters in case of closed feedwater heaters extracted steam or bled steam will not be mixed with feedwater.

Closed system water heater.

Closed systems are often used in second homes or primary residences in areas prone to long power outages. The heating fluid is self contained within the system and stays there unless removed for maintenance completely separate from the domestic hot water. A closed water heater system means that the hot water cannot expand beyond the valves and mix with the municipal water. When water heats it expands.

Radiantec s closed system uses a high efficiency water heater or boiler to heat water or another heating fluid such as anti freeze. Some new water meters also have a check valve. A water heater heats water that is constantly being replenished since it is connected to taps. 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.

The heated water then flows into the storage tank before it s channeled into the heat exchanger. 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. A closed system is created when there is a check valve between the water heater and the city water main. This is usually in the form of a bell shaped pressure regulator which is normal located very close to the water pipe s entry to the house.

If freeze protection is an issue than a closed system with anti freeze is a good idea. All water heaters waste heat energy even when the burner is off and the unit is sitting idle between heating cycles. 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. The down side is two heat sources.

The valves that are usually found in the closed systems are the check valve pressure reducing valve mixing valve backflow preventer and other.