Both formats can work well. Compare the exact models and drawings because the labels barrel and cabin do not guarantee a particular build standard or installation scope.
Space and seating
Curved barrel walls reduce standing room at the edges and shape the bench layout. Cabin walls can make foot space and tiered benches easier to arrange.
Weather and maintenance
Inspect how the roof, end walls, glazing, door and lower timbers shed water. Ask what covering or treatment is required and whether it affects the warranty.
Installation and services
Compare foundation drawings, component sizes, delivery access, assembly time, heater clearances and cable or flue routes for the actual model.
Frequently asked questions
Is a barrel sauna more efficient than a cabin sauna?
Shape alone does not prove lower real-world energy use. Volume, insulation, air leakage, glazing, heater sizing, controls and weather conditions all matter.