Help with my homework please - TRVs

[The Plumber Guy]

Evening all,

I've decided to try recovering from England's crushing defeat this morning by doing some plumbing homework. I'm on my Central Heating unit and I need to know where NOT to put TRVs. I'm pretty sure the answer is on the radiator(s) where the room stat is located because the room stat won't turn the heating off in the rest of the house if it doesn't heat up enough.

Can anyone confirm I'm right please but also it's made me wonder why you often don't see TRVs on the rad/towelling rail in the bathroom. I'm sure my tutor will answer this but he seems a little unhappy with the class as a whole and I'd like to reassure him someone's interested in the subject!!

Cheers all.

 

[Gray0689]

Yes no trv on where there is a room stat
Old way was towel rails where used as bypass

 

[WHPES]

You don't normally find TRVs on towel rails - they are usually fitted with decorative chrome valves, and as stated above, historically before automatic bypass valves were invented, they were used as a bypass for when the TRVs in the other areas started to close.

 

[SimonJohns]

If you have a trv on the bathroom it won't dry out the damp after a shower or bath due to the heat given off by ho****er

 

[LegionellaSlave]

You wouldn't use a trv on a rad that's got a cover on it.
Unless it had a remote sensor.

 

[WHPES]

.........or rather to clarify the above (re Part L) - you would use a TRV on a rad with a cover but it must be of the remote sensor type.......

 

[LegionellaSlave]

Correct