Start with the stove. Cozy builds distinct wood-burning sauna heaters with structural-steel firebox walls about 67% thicker than a typical standard-stove wall, clean welds, and three-path combustion that uses about 25% less wood without making the fire fussy. Sauna Marketplace met the Cozy team in Estonia and came home excited about the build quality and the way these stoves burn. They are built to last, and they are the kind of straightforward stove many of our Estonian friends use at home. Compare all ten Cozy stove families.