Hot Water - Radiator Always Hot

[DIYamTrying]

Can anything be done about this?

Conventional Boiler located downstairs in kitchen. When heating isn't needed, but hot water is, you can't turn off the bathroom radiator. I.e, the only way to get and store hot water is having to put up with a hot bathroom even in a heatwave.

Is there a solution to this?

 

[oldbutnotdead]

Depends on the make/model of your conventional boiler and whether your hot water is gravity or pumped?
Lots of older boilers ( 80s/90s) required a radiator always connected to the boiler (ie before any motorised valves) to prevent heat exchanger overheating. Modern requirement on fully pumped systems is an automatic bypass valve (again permanently connected) minimum 5 metres pipe run from boiler.

 

[Deleted member 267285]

Could the 3 tee rule have been broken?

 

[ianmcd]

your system was probably solid fuel at one time and the bathroom rad has been fitted as a heat dump, very common way back, just close one of the valves when you dont want it on , wont do any damage to your gas boiler

 

[sxturbo]

As Ian said,

In your thread yesterday I thought you meant all the radiators were on permanently and you closed all the valves so only bathroom rad was on.

 

[Agile]

Some installers used to connect the bathroom radiator to the cylinder heating coil.

The explanation was that people wanted the rad in the bathroom to be hot to heat/dry towels.

Slight problem with that was that the cylinder reheats after the hot water has been used so after the bath/shower use has ended.

Some manufacturers "solved" that problem by producing towel rads with a small electric heater.