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2. Unplug These Appliances That Hike Up Your Electricity Bill - AOL

   www.aol.com/finance/unplug-appliances-hike...

   Hot Water Recirculation Pump Average Wattage: 28-92 watts Cost per Year: $28-$93 Plug your hot water recirculation pump into a timer and program it to switch the pump off at times when no one is ...

3. 29 Items That Hike Up Your Electricity Bill - AOL

   www.aol.com/unplug-appliances-hike-electricity...

   Hot Water Recirculation Pump. Average Wattage: 28 to 92. Cost per Year: $42- to $137. Plug your hot water recirculation pump into a timer and program it to switch the pump off when no one is ...

4. Circulator pump - Wikipedia

   en.wikipedia.org/wiki/Circulator_pump

   The traditional hot water recirculation system uses the existing cold water line as return line from the point of use located farthest from the hot water tank back to the hot water tank. The first of two system types has a pump mounted at the hot water heater while a "normally open" thermostatic control valve gets installed at the farthest ...

5. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   On-demand recirculating pumps are activated by push-button or other sensor. A water contacting temperature probe installed at the hot water usage point signals the pump to stop. Single-cycle pumping events only occur when hot water is needed, thereby preventing the energy waste associated with constantly heating water within piping.

6. Centrifugal pump - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_pump

   Warman centrifugal pump in a coal preparation plant application A pair of centrifugal pumps for circulating hot water within a hydronic heating system. Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine ...

7. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   Early hot water systems were used in Ancient Rome for heating the Thermæ. [13] Another early hot water system was developed in Russia for central heating of the Summer Palace (1710–1714) of Peter the Great in Saint Petersburg. Slightly later, in 1716, came the first use of water in Sweden to distribute heating in buildings.