Execution The panel Iron vitriol treated panel with wide panels. The insert The plastic is rotationally molded in a durable, maintenance-free and UV-resistant polyethylene plastic. The plastic is virtually indestructible and has an estimated lifespan of more than 40 years. The plastic can withstand heat up to 130 degrees and down to -50 degrees. It is environmentally friendly and fully recyclable. The insert comes in a beautiful dark grey color with a stone effect. The stove With flow-through tubes, the heat absorption capacity is excellent. The material is marine aluminum, which also provides maximum heat conduction. The stove is designed and manufactured by us at Swedish hot tubs. Water-coated stove that heats through self-circulation. The water in the stove is drained using a drain plug. Construction Iron vitriol-treated wood panel Planed and tongued and grooved panel where each plank is painted separately to provide the best possible protection. The iron vitriol gives a grayer color over time. Full bottom with drain The hot tub has a full bottom made of wood. This gives you a stable and insulating bottom. In other words, energy efficient. Mounted drain with bottom plug for easy emptying of the tub.