Introducing the Almost Heaven Serenity 4-Person Wood-Fired Hot Tub, a sustainable outdoor spa solution that blends relaxation with environmental consciousness. Perfect for those who appreciate a cold plunge after the sauna or a warm soak to ease muscles and melt away stress, this hot tub requires no electricity, gas, pumps, wiring, or filtration systems. The natural heating process is efficient and straightforward: fill with water, light the wood in the firebox, and enjoy the soothing warmth in just a few hours.