We're aware that some users are experiencing technical issues which the team are working to resolve. See the Community Noticeboard for more info. Thank you for your patience.
📨 Have you signed up to the Forum's new Email Digest yet? Get a selection of trending threads sent straight to your inbox daily, weekly or monthly!

Replacing radiator in my loft conversion

Options
2»

Comments

  • pieroabcd
    pieroabcd Posts: 684 Forumite
    Fourth Anniversary 500 Posts Name Dropper
    I've already bled all radiators and rebalanced the system several times. The only combination that works is the current one, with most radiators valves barely open at the first two floors and the valves fully open in thr loft.
    I don't know what are the temperatures.
    I've returned the reader because it proved to be completely unreliable.
    Both valves are two plain lockshield type.

    The inlet water pipe is actually very hot, as hot as all the others (abd much hotter tham the rad surface). I don't understand how the radiator that irradiates heat very well doesn't get as hot as I expect, though.
  • FreeBear
    FreeBear Posts: 18,163 Forumite
    Tenth Anniversary 10,000 Posts Name Dropper Photogenic
    pieroabcd said: The inlet water pipe is actually very hot, as hot as all the others (abd much hotter tham the rad surface). I don't understand how the radiator that irradiates heat very well doesn't get as hot as I expect, though.
    What is your flow temperature and what temperature drop are you aiming for across the radiator ?

    Her courage will change the world.

    Treasure the moments that you have. Savour them for as long as you can for they will never come back again.
  • pieroabcd
    pieroabcd Posts: 684 Forumite
    Fourth Anniversary 500 Posts Name Dropper
    60 degrees.

    I'm not aiming at anything specific because I did all the balancing without measuring anything. Only at my heart's content:-)
  • FreeBear
    FreeBear Posts: 18,163 Forumite
    Tenth Anniversary 10,000 Posts Name Dropper Photogenic
    pieroabcd said:
    60 degrees.

    I'm not aiming at anything specific because I did all the balancing without measuring anything. Only at my heart's content:-)
    OK, a 60°C flow means you should be aiming for a 12°C drop across the radiator - To do this with any degree of success requires the use of a clip on thermometer (or better still, a pair). Doing by ear or feel is doomed to failure.
    A couple of cheap thermometer modules from Amazon or Ebay - They do not need to be accurate.


    Her courage will change the world.

    Treasure the moments that you have. Savour them for as long as you can for they will never come back again.
  • grumbler
    grumbler Posts: 58,629 Forumite
    Part of the Furniture 10,000 Posts Name Dropper Photogenic
    edited 6 January 2024 at 2:00PM
    pieroabcd said:
     I don't understand how the radiator that irradiates heat very well doesn't get as hot as I expect, though.
    Is it not obvious? It dissipates heat faster thaт it's supplied by the low flow of hot water. As a result, water inside cools down.
    This is the case for any radiator - its temperature is a result of balance between supply and dissipation of energy. Cut the supply and the radiator will cool down to   room temperature.
  • Lorian
    Lorian Posts: 6,228 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    Is it possible it's not bi-directional and flow and return are the wrong way round, if it has a baffle.
Meet your Ambassadors

🚀 Getting Started

Hi new member!

Our Getting Started Guide will help you get the most out of the Forum

Categories

  • All Categories
  • 350.8K Banking & Borrowing
  • 253K Reduce Debt & Boost Income
  • 453.5K Spending & Discounts
  • 243.8K Work, Benefits & Business
  • 598.6K Mortgages, Homes & Bills
  • 176.8K Life & Family
  • 257.1K Travel & Transport
  • 1.5M Hobbies & Leisure
  • 16.1K Discuss & Feedback
  • 37.6K Read-Only Boards

Is this how you want to be seen?

We see you are using a default avatar. It takes only a few seconds to pick a picture.