SaunaLife Model S4N

No, this tub is entirely wood-fired. It relies on an integrated stainless steel heater, meaning you do not need to run any electrical lines or worry about proximity to an outlet.

With the integrated wood-fired heater, you can expect the water to reach a comfortable soaking temperature in under two hours, depending on the ambient air temperature and the quality of your firewood.

Thermo-Spruce undergoes a thermal modification process that removes moisture and resin, making it significantly more resistant to rot, decay, and warping than standard cedar, which helps the exterior maintain its structural integrity over time.

The Model S4N is designed to accommodate up to six bathers. The interior features a contoured fiberglass lining that helps define the seating area and ensures comfort for everyone.

Because the tub weighs nearly 3,000 pounds when filled with water, you must place it on a level, solid surface capable of supporting that weight, such as a concrete pad, reinforced deck, or a compacted gravel base.

Maintenance is straightforward but requires consistency. You will need to clean the fiberglass interior regularly, manage the water chemistry as you would with any soaking tub, and ensure the wood heater is cleared of ash after each use.