Temp overshooting in front room

Joined
5 May 2004
Messages
437
Reaction score
24
Country
United Kingdom
Ok, in our front room we have two large cast iron rads (about 3 years old). We have known for some time that they cause the temp to overshoot quite badly due to latent heat etc. So now I am trying to mitigate this but not having much success.

I have tried using the TRVs to limit the temp but because these rads get so hot they overwhelm the TRVs causing them to cut the water supply too early - even before the room gets up to temp. Its like trying to tune an old radio !!!

So, what are my options ? heating water temp ? lockshield valves ? - what do heating engineers usually do to tackle this ?

Thank you.
 
Sponsored Links
Fit radiators that are sized to the room. Alternatively, you could throttle the lockshields down to a trickle so you don't keep forcing very hot water through them. Take a look at the many posts on balancing.
 
Fit radiators that are sized to the room. Alternatively, you could throttle the lockshields down to a trickle so you don't keep forcing very hot water through them. Take a look at the many posts on balancing.

Thank you - I'm defo not going to rip the rads out - but will look into the lockshield option.
 
My Honeywell DT90E room stat temporarily stops the heating at 1.5°, 1.0° and 0.5° Before the set temperature is reached as the room is warming up to prevent overshooting.
 
Sponsored Links
Danfoss, Pegler, Drayton etc., manufacture TRV's with a remote sensor that can be located away from the radiator.

You could try setting one slightly lower than the other, so that one would cool down whilst the other finishes off the final heating the room to the set temp. That would reduce the latent heat at the point of cut-off.
 
TRV's are a very coarse method of regulation. For close control you need a more sophisticated thermostat which will enable you to 'tune' them better. If this room is your usual sitting room, then don't forget that if it warms up quickly, it may cause problems elsewhere.
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Back
Top