Towel Rail off DHW

Hi

After a few weeks of working out my UFH
woes which now seem to be mainly solved, I was bleeding the few radiators we have when I noticed the towel rail in our bathroom doesn’t get hot when the central heating is on, but just when the hot water tank is topping up.

House is 20yrs old, and from reading other threads it seems this is a pretty old design. Could there be another reason for this, maybe as a buffer for the hot water circuit (although it doesn’t seem to affect the return temps at all)?

Many Thanks

Paul

Common set up to have the bathroom towel rail either as a bypass or on the hot water circuit. Folks seem to like having warm dry towels all year round.

Ah thanks!