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cold

Cold is the presence of low temperature, especially in the atmosphere. In common usage, cold is often a subjective perception. A lower bound to temperature is absolute zero, defined as 0.00 K on the Kelvin scale, an absolute thermodynamic temperature scale. This corresponds to −273.15 °C on the Celsius scale, −459.67 °F on the Fahrenheit scale, and 0.00 °R on the Rankine scale.
Since temperature relates to the thermal energy held by an object or a sample of matter, which is the kinetic energy of the random motion of the particle constituents of matter, an object will have less thermal energy when it is colder and more when it is hotter. If it were possible to cool a system to absolute zero, all motion of the particles in a sample of matter would cease and they would be at complete rest in this classical sense. The object would be described as having zero thermal energy. Microscopically in the description of quantum mechanics, however, matter still has zero-point energy even at absolute zero, because of the uncertainty principle.

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  1. N

    Low cold water pressure only in bathroom

    Hi, I’m new to the forum and would really appreciate some advice on this problem I have with my bathroom cold water pressure. We recently moved to this one bedroom flat and our hot water comes from a communal boiler in the basement. In the kitchen the water pressure is good for both hot and...
  2. F

    Shower replace cartridge cold hot does not work

    Moen Posi Temp1222A cartridge replacement. I replaced my old cartridge with a new one. I one with the handle goes from cold to hot. Now it goes from warm to hot. I reversed the cartridge and get warm to cold. I don’r what else to do so it can get cold to hot again. I tried at least 2 brand new...
  3. P

    how do I fix the cold water faucet that is barely running?

    My upstairs cold water faucet just barely streams out.. The cold and the hot in the shower are fine but not the cold water of the sink. Is there anything I can do myself without calling for a costly pllumber?
  4. omendata

    Blocked Cold Water Tank Pipes - Doing my head in for over a year

    Ok I have been dealing with this problem for over a year and finally have to ask for some help as backflushing every 2 weeks or so is getting very tiresome. I live in a 60's flat (3 flats per side of the block so 6 flats in all) with two overhead water tanks in a tankhouse on the flat roof for...
  5. T

    Megaflo cold feed hammering.

    Afternoon all, I’ve recently started getting a loud vibration coming from the cold feed. Only when I’ve got the hot tap on. Any ideas what it could be? I’ve managed to stop the vibration by turning the blue valve slightly. Thanks in advance.
  6. Bazza1687

    Shower runs cold when hot taps used

    Hello, I have just installed a new shower which works well, however if you open a hot tap anywhere else in the house the shower runs cold, however if I open a cold taps the temperature does not change. I believe my shower is only a mixer not thermostatic did not do my research when buying the...
  7. S

    Mega flo issue: no water flow from hot tap, cold tap ok

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  8. P

    Heatpump Hot on Gas Side But Cold On Wet Side?

    Mitsubishi Ecodan 2011 8.5kw Hy Guys, I have just installed a second hand ecodan, all seemed to be going well until i noticed that the flow temp doesn't increase much, infact 2 degrees in 40 mins, then the pump shut off with a over temperature warning on the gas side. I have it piped up to a...
  9. A

    Cold water flow problem has stumped 3 plumbers...can you help?!

    Afternoon all - We have a problem with very little/no cold water flow on the ground and first floor of our (fairly new build, 7 years old) 3 story town house. All flow is fine on the top floor and the hot water is unaffected and runs throughout the house. It's an unvented, balanced system...
  10. J

    radiators cold at the bottom

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  11. W

    Mixer shower - mains cold - gravity hot

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  12. W

    URGENT Why does my shower keerunning hot and cold

    Why does my shower keep running hot and cold
  13. J

    Cold water storage tank setup

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  14. L

    Combi hot water cycling hot cold hot cold

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  15. D

    House pressure reducing valve cold water hammer

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  16. A

    Do you have balance hot and cold water pressure with a combi boiler?

    So getting a digital shower and it says the hot and cold water should be balanced. Am I right in thinking they should already be balanced with the hot taking on the cold pressure entering the boiler or am I way off? Cheers
  17. K

    new boiler just in, HW from shower goes cold after (5-10 mins),

  18. RichardWoking

    Cold water overwhelming hot to showers

    Recently 2 of my showers stopped producing hot water following a plumber refitting another of my ensuites. The 2 showers in question are pumped with a Salamander twin house pump. Hot is reaching the showers (hot feed to mixer is hot), yet both showers are luke warm, at best. The other recently...
  19. atorso

    Hisense dishwasher hose won't connect to cold water supply

    We've had a new dishwasher delivered - Hisense HS661C60WUK - and I'm having trouble connecting it to the cold water supply. It just won't screw on all the way. Threads don't look damaged to me. Looks like it's some sort of anti-flood hose (?) which I've never used before. No info about this in...
    • atorso
    • Thread
    • america cold cold water connect dishwasher help hose supply usa water won't
    • Replies: 13
    • Forum: USA
  20. J

    To insulate both hot and cold pipes?

    Hi all, I just learned the external pipes for boiler system should be insulated especially in loft and garage as they are in very cold area. I checked my loft and found some pipes are insulated but others are not! I think it is because the insulated pipes are from previous owner's, since I...
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