O.S., outside stove; G.B., gas bracket; R.T., rubber tubing, which conveys gas to the stove; T., tap, inside bath, by which the bather controls gas supply; M.C.T., metal-covered tube, from tap to stove; F.F., funnel which conveys the hot air, or vapour, from stove into the bath.

Some of the advantages of gas heating were better control of the heat output, the ability to heat the bath quickly before the bather enters, and the low cost, estimated at 'a fraction of a penny' per bath.