U-shaped towel warmers

U-shaped coil

— a kind of coils (see the relevant paragraph), in which the main (leading) pipes are bent in the shape of the letter "P". Most often, between the “legs” of this letter there is an additional coil of pipes of smaller diameter — thus, with small dimensions, the heated towel rail provides a lot of “seats”. However, there are also the most simple models, without an additional coil.