Wood-fired hot tubs are made for year-round outdoor bathing. The recommended bathing temperature is 35 °C. With most the wood-fired hot tubs available in the UK (common wooden bathing barrels made by “specialists”) it takes up to five hours to heat up the water. But when we are talking about Kirami products, we are talking about the best-selling hot tubs in their homeland, Scandinavia. These efficient heaters require only about two hours’ heating time. All the fuel that’s needed is just one sack of wood to have your bath ready for your garden SPA treatment.