![]() While these upgrades do address some sanitary and convenience issues, other issues with this design exist. To compete with modern, feature rich spas, some builders have added simple heater and filtration systems as upgrades. If the fire goes out, it must be restarted mid-soak to maintain the temperature. The temperature needs to be checked frequently with a floating thermometer, and the fire dampened to avoid overheating. Wood burning systems do not have temperature regulation. In addition to the extra labor, any breeze will blow soot and ash from the furnace into the water. Wood must be purchased or cut and split, and a fire must be started for each soak well in advance. Now, exterior stoves are available with a chamber that flows hot water into the tub and cold water out. This is similar to the way ocean currents move water.įar from the always ready spas of today, these heaters require much work before getting in the tub to relax. Still made today, these underwater units place the occupants right next to the furnace, protected by a small wooden fence. Wood-fired submersible fireboxes heated early wine-vat tubs, homemade from scrap metal and a little ingenuity. Several adjustable metal bands on the exterior are tightened to secure the staves in place. The slots in the bottom of the staves, called croze, hold the floorboards without nails or glue. ![]() Slotted vertical boards, or staves, are beveled slightly to create a tight fit.įloorboards are connected together using small dowels, called a pin and hole joint. Wooden tubs, often made of redwood or cedar, are constructed in the same tradition as barrel-making, called cooperage. Spas are definitely hot tubs, but wood hot tubs are not usually referred to as spas. They have many more features like advanced filtration, numerous jets, and sanitation. Wondering what the difference is between a hot tub and spa? All hot tubs hold hot water, but spas are made of more durable materials like acrylic or resin. ![]() Some wood spas are still sold and in use today, but largely have been replaced by energy efficient portable spas. The first round wood hot tubs of the 60’s were converted from discarded wine vats from California vineyards. Wood hot tubs are the humble beginnings of the modern spa.
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