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  2. 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 ...

  3. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    The power through the thermostat is provided by the heating device and may range from millivolts to 240 volts in common North American construction, and is used to control the heating system either directly (electric baseboard heaters and some electric furnaces) or indirectly (all gas, oil and forced hot water systems).

  4. Absorption heat pump - Wikipedia

    en.wikipedia.org/wiki/Absorption_heat_pump

    Natural gas is a common-used heat source, therefore, absorption heat pumps are sometimes called gas-fired heat pumps. [11] Also, when other heat sources heat pumps (waste heat for example) are running at the heating mode, they can meet the overload heating requirements of very cold periods in an efficient manner through additional gas boilers. [6]

  5. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    In general, heat pumps work most efficiently (that is, the heat output produced for a given energy input) when the difference between the heat source and the heat sink is small. When using a heat pump for space or water heating, therefore, the heat pump will be most efficient in mild conditions, and decline in efficiency on very cold days.

  6. Grundig - Wikipedia

    en.wikipedia.org/wiki/Grundig

    Grundig started as a typical German company in 1945. Its early notability was due to Grundig radio.Max Grundig, a radio dealer, built a machine called "Heinzelmann", which was a radio that came without thermionic valves and as a do it yourself kit to circumvent post war rules.

  7. Heat pump and refrigeration cycle - Wikipedia

    en.wikipedia.org/wiki/Heat_pump_and...

    Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]

  8. Reversing valve - Wikipedia

    en.wikipedia.org/wiki/Reversing_valve

    A reversing valve removed from an HVAC heat pump for replacement. A reversing valve is a type of valve and is a component in a heat pump, that changes the direction of refrigerant flow. By reversing the flow of refrigerant, the heat pump refrigeration cycle is changed from cooling to heating or vice versa. This allows a residence or facility to ...

  9. 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 ...