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2. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   Liquid-to-water heat pumps (also called water-to-water) are hydronic systems that carry heating or cooling through the building through pipes to conventional radiators, underfloor heating, baseboard radiators and hot water tanks. These heat pumps are also preferred for pool heating. Heat pumps typically only heat water to about 55 °C (131 °F ...

3. Hand pump - Wikipedia

   en.wikipedia.org/wiki/Hand_pump

   A hand pump opens access to deeper groundwater that is often not polluted and also improves the safety of a well by protecting the water source from contaminated buckets. Pumps such as the Afridev pump are designed to be cheap to build and install, and easy to maintain with simple parts.

4. Solar water heating - Wikipedia

   en.wikipedia.org/wiki/Solar_water_heating

   The controller starts the pump when the water in the collector is sufficiently about 8–10 °C warmer than the water in the tank, and stops it when the temperature difference reaches 3–5 °C. This ensures that stored water always gains heat when the pump operates and prevents the pump from excessive cycling on and off.

5. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   This water wastage can be avoided if a recirculator pump is installed, but at the cost of the energy to run the pump, plus the energy to reheat the water recirculated through the pipes. Some recirculating systems reduce standby loss by operating only at select times—turning off late at night, for example.

6. 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 ...

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