If anyone wants 12 unused Radbots (minus batteries), feel free to message me.

Ebay?  Or has the market been saturated as a result of ECO4?

I think part of the ECO4 scheme has a section on heating controls, and Radbots tick a box for fancy room-based control of radiators. Complete waste of money although they do look smart. I did manage to recycle 24 AA batteries from them, so all was not lost. If anyone wants 12 unused Radbots (minus batteries), feel free to message me.

They also left a box of primaflow TRVs so I was hoping to fit them instead (see pic). But they don't fit the radiator valves. Would they be as bad as the Radbots? I just want something where I can leave the rads on high during the day and off at night so the bedrooms don't get too hot. I know programmable ones would be ideal but this would be just a temporary measure, since I have them already.

OK, let me refine my simplified initial statement.  Generally I would recommend that any TRVs except

(a) for aesthetic reasons as described above

(b) set 2-3C above the desired temperature in rooms that might get excess solar gain or heat from cooking, so they act as limiters (but not controllers

(c) in a minority of rooms where constant temperature is not acceptable for comfort. 

If you need to fit TRVs in bedrooms for comfort go ahead, but consider first whether you need variable temperature or whether a fixed lower temperature in these rooms would suffice.  For many its the latter.  If it is the latter, turn down the lockshield valves instead until the room is at the right temperature.  I started off with TRVs in my bedrooms but have now removed them and turned the lockshields down.  Alternatively consider a degree or two night time setback for the whole system, if the controller supports this.

What you do not want to end up with is having anything more than a minority of rooms with TRVs, but a small number is OK if needed for comfort.

The plastic pieces seem to be called 'TRV adapters' or 'TRV head adapters' see eg temu The radbots would probably have come with a set of adapter rings, but the installers would have binned them!

I hope thats more helpful!

Thank you.

They also left a box of primaflow TRVs so I was hoping to fit them instead (see pic). But they don't fit the radiator valves. Would they be as bad as the Radbots? I just want something where I can leave the rads on high during the day and off at night so the bedrooms don't get too hot. I know programmable ones would be ideal but this would be just a temporary measure, since I have them already.

You don't say what your heating us.

If by any chance you have a heat pump don't fit radbots.  In most cases don't fit trv tops either, other than for cosmetic reasons (so leave most on max and slightly unscrewed)

Regards, Toodles.

I have removed a load of radbots, hoping to replace them with these normal TRV tops but they don't quite fit with the plastic ring they were fitted with, or without. So I need slightly smaller rings, but don't know what they're called!