Ray Magic hydronic radiant cooling & heating panel wall mounted in a bathroom. This is an effective alternative option to condition small spaces especially if the ceiling is filled with lights, fans and speakers.
It can also be covered with tiles.

A 4’x8′ radiant drywall panel can effectively meet the heating and cooling loads, up to 1,000 Btu/h in cooling and up to 1,500 Btu/h in  heating (per panel).