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Radiators are heat exchangers used to transfer thermal energy from one medium to another for the purpose of cooling and heating. The majority of radiators are constructed to function in cars, buildings, and electronics.A radiator is always a source of heat to its environment, although this may be for either the purpose of heating this environment, or for cooling the fluid or coolant supplied to it, as for automotive engine cooling and HVAC dry cooling towers. Despite the name, most radiators transfer the bulk of their heat via convection instead of thermal radiation.

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  1. C

    Simple radiator valve question

    How do I fit a Thermostatic valve to that?
  2. M

    Vertical radiator not heating up fully

    I am after an advice, please. We have a vertical radiator from Reina, Evie, that heats up only 2nd column fully, 1,3 and 4 are lukewarm. I borrowed a thermal camera and attached is the thermal image. System is balanced, there doesn't seem to be air coming out of the bleeding valve and was...
  3. P

    Bloc Feed pipe to radiator

    I have a badly blocked feed pipe to kitchen rad, was running very slowly but I’ve made it much worse trying to clear blockage with curtain wire, pushing the blockage to the manifold I think now totally blocked. Return pipe is clear. Exposing manifold is major as it’s between floors and involves...
  4. M

    Replacing Radiator with drain valve

    I want to replace a radiator that has a drain valve. Do I need to replace like for like and keep the drain valve in or can I replace with a thermostatic valve?
  5. G

    Adding a radiator to a mancave

    I would like to add an additional radiator to our central heating system. We have an attached double garage converted to a man-cave and workshop (with dividing stud partition wall) currently not covered by the central heating. The former is not currently user friendly in winter, and we get by...
  6. SteveRobert5a

    Basic Radiator Question

    I have a downstairs rad that has a 23 year old TRV and it's barely heating up. I bled it, and removed the TRV head and it still just gets a bit warm. It seems to be warm over all the rad, not just at the bottom. The rest of the system heats up fine with the other rads getting hot. It's sealed...
  7. J

    Undersized radiator?

    I have had some old radiators replaced. Having checked the btu calculation myself, the new radiator is slightly undersized. It should have been 6150 btus, and the k1 rad that has been fitted (the required width in order to fit the old pipes) is 6025 btus. Output wise the next rad up would be a...
  8. A

    Strange Radiator Valve Screw

    I need to turn on a radiator and want to remove the valve top to put a spanner on it as it as it is stiff, however the screw holding it on looks like a security screw as it has two holes in it. Has anyone seen these before?
  9. S

    Towel radiator not heating

    Hi, I have an electric towel rail which has stopped working. All the lights are flashing from blue to red and the boost light is flashing green I have tried re-setting it but still no luck. Can anyone help please? I have the manual for it and it’s a Smart version from Advanced Heating Solutions.
  10. S

    How do I remove this radiator thermostat?

    Hi, I’m looking for some advice on how to remove this radiator value to check if the pin is stuck. I have two similar values in the house where those radiators aren’t heating up at all. The pipe leading into the value is cold but the rest of the system is working fine. Thanks for any help/advice!
  11. R

    Radiator is heating up only to 1/3 of high

    Hi to all, I have bought a new radiator as replacement for old one. After installation by plumber, the new radiator is heating up only to 1/3 of high. The rest remain cold. Also, radiator is making quite loud noise when heating up. The system/radiator is free of air. My plumber was...
  12. D19A99G

    Radiator not heating up

    I have recently bought my own house and decided to redo the kitchen. There was a radiator in the room already but I wanted to move it. I extended the pipes (8mm microbore) and plumbed in the new radiator. I opened the isolation valves and filled up the radiator with no issues. I've bled every...
  13. D


    Hi Everyone, I hope someone might be able to help please. I hope this isn't a daft question. I am trying to remove the side panels on my radiator to get in to clean it, but they seem to be secured by a small screw underneath (on the valve housing). Can someone please advise me if I can just...
  14. A

    Combi-Boiler Radiator Problem

    Hi, I have a combi-boiler system and while I did some plumbing many years ago I have never fitted a combi-boiler and am confused by this problem . I removed a radiator on the upper floor of my house to clean and paint the wall behind it, when removing it I shut down the lockshield and packed the...
  15. O

    Radiator not heating up

    Hi All, We renovated our house in 2019 and put in completely new plumbing system and piping including new boiler and 9 radiators. Off those, there is one radiator in the living room which does not heat up at all. I have tried balancing myself and also had a professional come in to balance it...
  16. frasmotic

    Radiator comes on with hot water

    Hello all, I've just had a new radiator installed and it comes on with the heating as expected but then also came on when the hot water came on without the heating. Ours is a system boiler worcester greenstar 30cdi with an unvented cylinder. The new radiator has been hung in the w/c on the...
  17. A

    What type of radiator is this?

    Hi, I'm looking to add some radiators into my property and ideally looking to match the style of the existing ones. I cannot seem to find anything online to match. I assume this style of radiator is no longer manufactured, but I might be able to pick one up second hand. Can anyone help me...
  18. M

    Best radiator brands?

    Hi folks. I need to replace a few rads, about 30 years old. Any advice on best quality rads appreciated. I got a quote from City Plumbing for their Halcyon rads, made by Stelrad ... the guy told me they are the same as genuine Stelrad, but cheaper. A good bet? Thanks.
  19. A

    Removing old radiator pipes, do I need to drain the system?

    Hi All, I have two sets of radiator pipes that need removing. Although neither set of pipes have radiators on them anymore they are both still connected to the system and contain water. A plumber I have spoken to says to remove them he'll cut the pipes vacuum out/up any water and then cap them...
  20. J

    Radiator not filling from F&E

    Hi so I changed a towel radiator in bathroom from a normal radiator. I bunged the f&e tank and vent pipe , drained about a pint of water out the pipes. Altered the pipes to the new rad. Then removed the bungs. Gone to bleed the radiator it filled slightly now no air is coming out. I've...
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