Search the forum,

temperatures

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.

View More On Wikipedia.org
Recent contents Top users
  1. R

    What are the normal cycling temperatures of a boiler

    I have a Glowworm Ultimate 35C boiler. It shuts off at its max temp of 60C when heating radiators and the pump carries on running pumping heat round system but it seems to let temperature drop at least 30 degrees before burner comes back in by which time radiator temperature has dropped...
  2. J

    2 different Temperatures from same shower

    Hi All New here and have a bit of a weird one for you! Installed a concealed shower valve on a job with a rainfall shower head, and a handheld as well. The customer specifically wanted to be able to have both the rainfall and handheld on at the same time, and the supplier i was using only...
  3. M

    I need a hot water tank thermostat for hotter than normal temperatures

    I have a need for for a thermostat for a copper cylinder connected to solar power so I'm looking for an accurate thermostat which will allow me to store water at up to 90c ? I have tried a bog standard Honeywell and a couple of cheaper stats but none of them even work up to the advertised 80c...
    • mpooley
    • Thread
    • hot hot water hotter normal tank temperatures thermostat water water tank
    • Replies: 15
    • Forum: Central Heating Forum
  4. W

    Rayburn 460K Flue temperatures?

    Greetings! Having just rebuilt a Rayburn 460k with (ecoflam burners) due to the dreaded warped oven protection plate, I am trying to work out if the test point temperature readings for the Rayburn are, ‘what you’d expect’ Flue ways on cooker side & boiler side, including boiler baffles all now...
    • William86
    • Thread
    • america flue rayburn temperatures usa
    • Replies: 2
    • Forum: USA
  5. N

    Help with wet under floor heating temperatures

    We had a wet UFH system installed a couple of years ago. Two weeks ago we had vinyl tiles laid. The instruction from the flooring guy is to start the UFH at 5 degrees and increase by 5 degrees per day until we reach a comfortable temperature. Also, instructions from the flooring company read...
  6. T

    Have added an underfloor zone to existing heating have issue with temperatures

    So I have just added an underfloor zone to a house extension. Boiler is Worcester Greenstar 30Cdi. has a Comfort II RF stat fitted that controls the radiator zone. I have added a zone valve to my new zone and used the 230V side of the control board to fire the boiler. the boiler fires fine but...
    • Timlazisa
    • Thread
    • added central heating system existing forum heating issue plumbing temperatures underfloor zone
    • Replies: 0
    • Forum: Plumbing Zone
  7. J

    Room temperatures

    Can you get your room temperatures right (19° for a bedroom, 21° for a living room etc) right without room stats. Is the desired temperature taken into account when sizing radiators?
  8. B

    Hot water temperatures at the basin

    Hello I recently had a new cylinder install. The temperature at the basin sinks is between 56-58C and is far too hot to use. Is there a legal maximum that is applicable for domestic properties? What should the temperature be for basin sinks? Thanks.
  9. J

    Hot Water Cylinder Temperatures

    150 litre cylinder, top 100 litres are heated by a coil (average temp 70C), the bottom 50 litres (or the whole 150 litres in summer) are heated by a solar coil. There are PT1000 probes fitted in numerous places and the HW zone valve is controlled very accurately by a spare output from the solar...
  10. H

    Lowering return temperatures

    Evening all. Enthusiastic have a go guy here! I did get into the whole calculation of heat capacity of flow and calculated resistance after we had a few terrifying quotes when I bought the house - Quite a large 3 floor 7 bed Edwardian house. I fitted a 300 litre unvented cylinder and...
    • Hollinside
    • Thread
    • america balancing condensing boiler flow and return return temperatures usa
    • Replies: 12
    • Forum: USA
  11. P

    Erratic shower temperatures.

    My shower used to deliver water at an ideal temperature to both the main shower head and the the smaller head on a flexible hose. Suddenly the temperatures are erratic,either boiling hot or freezing cold. What do I need?
    • Pobbles
    • Thread
    • america shower temperatures usa
    • Replies: 7
    • Forum: USA
  12. E

    Shower temperatures all over the place

    Hi all, I was having issues with my shower temperatures being stuck too hot - it wouldn't ever get cold. It's fed from a combi boiler and has a hand shower head as well as a fixed head on the tiles. I managed to educate myself on how to configure the temperature and found my happy medium...
  13. I

    Varying dhw temperatures

    Hi newbie here, I have a vaillant ecotec pro 24 boiler, the heating side is fine, but im struggling with variation in temperature on the dhw side. Ive cleaned and now changed the p.hex and changed the ntc sensor myself. Im still having probs and want some info on locating and cleaning the canoe...
  14. D

    Underfloor heating - supply & return flow temperature question

    Hi I have a wet based underfloor heating system and I've noticed that the stone floor in our kitchen isn't warming up evenly. There is one patch that is much warmer than other areas. I have noticed that when I look at the manifold the supply temperature is running at around 50 to 55 degs but...
    • dl1973
    • Thread
    • flow heating manifold question return supply temperature temperatures ufh under floor heating underfloor underfloor heating
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  15. J

    Secondary heat exchanger - flow/return temperatures

    Hi all, I'm a Gas Engineer, and new to fault diagnosis/repairs. I've measured the temperature on the flow/return pipes across my combi's secondary heat exchanger, with the hot bath tap on full. I have a Vaillant Ecomax 24 (year 2003). The flow was 70c, the return was 43.8c. I'd be interested...
  16. T

    Ufch off thermal store, flow temperatures too high??!

    Hi guys, any advice for my situation Ov thermal store with ufch tappings but ufch manifold v close to store, Problem is store temp at 72/73'c Manifold has phial type trv and is shutting down v quickly due to flow temperatures Clearly don't want 72 going through ufch (45ish ideally)...
  17. P

    BPS242RF Thermostat Auto Issues

    Have a thermostat (BPS242RF) and the receiver box on the wall (BR1 Boss Therm). Setting the thermostat as per the manual, but the auto setting seems to have a mind of its own and keeps turning the heating on when not required. For example. The thermostat clock is set to a 24hour clock. The...
  18. S

    HELP! What happens if we introduce sudden 80degree water in a radiator..

    Hi all , I'm working on boiler ramp up timings.. I was just curious that what are the things that can happen if we suddenly introduce 80C water in home radiators. I mean is it dangerous for radiators, do radiator manufacturers warn about it :93: what about its noise levels or expansion of...
    • sukhjeetgrewal
    • Thread
    • happens help radiator radiators sudden temperature temperatures water
    • Replies: 16
    • Forum: Plumbing Jobs | The Job-board
  19. M

    boiler temperatures

    Hi all, does anyone know what the most economic temperature to run a well controlled heating system at using a condensing boiler with standard panel radiators. I had heard 70 degrees celsius was best with at most 50C return to get the latent heat from the flue gasses. Or can I run at 80C for a...
  20. S

    Rad temps

    Hi allGot a custard who thinks that there's something wrong with a few rads cause there not hot enough, I mean they put there hand on and it doesn't take the skin off so they think it's not hot enough, even though there not cold! So what is the temp of a rad supposed to be when boiler on full...
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock