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temperature

Temperature ( tem-per-uh-cher) is a physical quantity that expresses the degree of hotness or coldness of a substance. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy, when a body is in contact with another that is colder or hotter. Temperature should never be confused with heat.
Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have used various reference points and thermometric substances for definition. The most common scales are the Celsius scale (formerly called centigrade, denoted as °C), the Fahrenheit scale (denoted as °F), and the Kelvin scale (denoted as K), the last of which is predominantly used for scientific purposes by conventions of the International System of Units (SI).
The lowest theoretical temperature is absolute zero, at which no more thermal energy can be extracted from a body. Experimentally, it can only be approached very closely (100 pK), but not reached, which is recognized in the third law of thermodynamics.
Temperature is important in all fields of natural science, including physics, chemistry, Earth science, astronomy, medicine, biology, ecology, material science, metallurgy, mechanical engineering and geography as well as most aspects of daily life.

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  1. M

    Setting central heating flow temperature

    What temperature is best to set the flow too on a central heating boiler? Setting it at a slightly lower value can make the boiler condense more?
  2. A

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  3. R

    Water temperature fluctuations

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  4. J

    temperature control of hot outside tap

    Is there thermostat that can located internally that has a hot and cold hot feed(obviously) to control the temperature of the outside hot tap? In essence it would be like a shower control but is there any product specific to controlling the temperature of the outside hot tap? Any comments or...
    • Joef
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  5. A

    Polypipe UFH manifold temperature conflicts

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  6. Reddwarf4ever

    Hot water temperature from Domestic immersion cylinder

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  7. J

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  8. A

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  9. S

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  10. B

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  11. B

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  12. M

    Boiler not getting up to temperature (or is it)

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  13. T

    Stiff shower temperature knob - does anyone know the cause?

    Hi all, Would really appreciate any advice. My shower temperature knob/dial on the right has suddenly become so stiff it does not move. So now jammed on the hot setting (and it's not even as hot asit should be either). It's relatively new - only installed about three months ago after a similar...
  14. A

    Will an external thermostat allow me to set two different temperature for water/heating?

    Hello team, first of all, I apologise if this isn't the right section of the forum to ask, if so, please dear moderator, move the thread! I am here to ask help as I just moved in a new house where I have a boiler that doesn't allow me to specify the temperature for water or for the heating but...
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  15. C

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  16. E

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  17. M

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  18. A

    Sonas temperature regulator not working

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  19. S

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  20. B

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