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2. 6 Money-Draining Appliances To Quit or Cut Down on - AOL

   www.aol.com/finance/6-money-draining-appliances...

   Water Heaters. Average Wattage: 4,500. ... a tankless water heater — heating water only as needed — is worth considering. ... Giant bluefin tuna the size of a motorcycle sells for $1.3 million.

3. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   Gas tankless water heater (Taiwan) On the other hand, tankless water heaters also have some disadvantages: [8] Startup costs: Beyond the 2x-4x larger initial purchase price (as compared to a tanked water heater), installing a tankless system comes at an increased cost, particularly in retrofit applications. They tend to be particularly ...

4. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   Gas tankless water heaters shall have an energy factor of 82% or greater under the 2015 standards, which corresponds to the pre-2015 Energy Star standard. In 2022 the Department of Energy proposed rules that would take effect in 2026 and would effectively eliminate inefficient non-condensing gas water heaters in commercial buildings.

5. Storage water heater - Wikipedia

   en.wikipedia.org/wiki/Storage_water_heater

   Solar heat is clean and renewable. This is the most modern system. Increasingly, solar powered water heaters are being used. Their solar thermal collectors are installed outside dwellings, typically on the roof or walls or nearby, and the potable hot water storage tank is typically a pre-existing or new conventional water heater, or a water heater specifically designed for solar thermal.

6. Energy factor - Wikipedia

   en.wikipedia.org/wiki/Energy_factor

   The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...

7. Hydronic balancing - Wikipedia

   en.wikipedia.org/wiki/Hydronic_balancing

   Hydronic balancing, also called hydraulic balancing, is the process of optimizing the distribution of water in a building's hydronic heating or cooling system by equalizing the system pressure. In a balanced system every radiator is set to receive the proper amount of fluid in order to provide the intended indoor climate at optimum energy ...