D
Dotty
As ever grandpappy comes in with the voice of reason. ...
Discuss Scalding hot water and radiators. in the Plumbing Jobs | The Job-board area at PlumbersForums.net
You are not wrong. It is a common misconception that a TRV provides a radiator with cooler water from the system.
I get where you're coming from but I disagree.
Let's look at a scenario ! If only to demonstrate my point .
It's the dead of winter and the house is cold, around 14 degrees c , it's early morning and the heating has been off all night.
The heating comes on, the TRV's are all open fully. That radiator, until the room temp starts to pass 16 degrees will be on the full temp that the boiler stat is set to.
I follow what you mean, in that, the warmer the room the lower the surface temp of the rads.
However, just because you install a TRV, you are not necessarily going to prevent high surface temperatures and you shouldn't suggest to a customer that installing one will prevent their child from burning themselves.
Am I wrong in your opinion ?
I don't think you're 100% wrong but a decent TRV will start to modulate almost immediately. Remember the boiler stat will also do the same - allow full power initially and then start modulating...
Not modulating on this boiler masood. Simple on off stat. Will go straight to 82 deg if set on Max and then off. What's more, it will maintain that temperature
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