Here is another gorgeous outdoor sauna with room for up to 8 people. The BZBCabins 8-Person Outdoor Barrel Sauna comes with a Harvia heater included. Its sauna room measures 6’10” (L)x 7’2″ (W) x 6’10” (H). This 2-room sauna igloo ships in an easy-to assemble kit. You can customize heater, windows, and water tank options before ordering.