11/30/2023 0 Comments Radiant floor heaterThere is no separation between the two.Īn indirect system is one in which the heat from the heating unit passes through a heat exchanger before it goes to the in floor heating tubes. Open systems require different mechanicals and materials.Ī direct system uses the same water for both heating and domestic hot water for doing dishes, laundry, taking showers, etc. A domestic water heater is an open system because the heated fluid is constantly changed. A typical use would be to keep the potable domestic hot water separate from the boiler fluid.Ī closed heating system is closed off from the environment and its heating fluid is only changed for maintenance.Īn open system is one that is open to the atmosphere or one in which the heating fluid is replaced often. There is a potential for higher efficiency with a hot water heater because of lower operating temperature and lower exhaust gas temperature, but many low end water heaters do not take advantage of this potential.Ī heat exchanger is a device that exchanges the heat from one fluid to another without a mixing of the fluids. ![]() Many boilers do not work well at lower temperatures and may need expensive controls to make the adjustment.Ī domestic water heater makes moderate temperature water and a storage tank is typically provided. Understanding the meaning of the following phrases will make it easier to understand your heating system options.Ī boiler is a heating device that is engineered to make very hot water (up to 250 degrees F, under pressure) for radiators and baseboards. GLOSSARY AND TERMINOLOGY SECTION If you see words and expressions that you are not familiar with, consult this section. Other benefits of the “Open Direct” System Significant amounts of the pollutants will dissolve in the water and they go harmlessly down the drain instead of polluting the air.
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