Wooden hot tubs are often made of redwood or cedar and assembled from vertical staves and the structure is held together like wooden barrels, with metal bands. Some examples of covers are insulated, aluminum, rolling, or a tonneau. Hot tubs should also be periodically shocked, which means oxidizing or breaking down organic material left behind from the sanitizer, as well as non-filterable material such as soap films and perspiration.
The jets may use a venturi effect to incorporate air into the water stream for a lighter massage effect; this requires another set of hoses. The hot tub pump and hot tub heater represent most of the power consumption in a hot tub and vary in use of power depending on their size. They typically can seat two to seven persons or more. For aesthetic reasons, and for the sanitizer to work properly, water should be neither too alkaline nor too acidic low pH. Many manufacturers advertise the superiority of their approach to insulation, but few independent side-by-side comparisons are available. Such incidents include hot tub folliculitis and legionellosis. Some examples of covers are insulated, aluminum, rolling, or a tonneau. Hot tubs are also found at natural hot springs ; in this case, the water may be dangerously hot and must be combined with cool water for a safe soaking temperature. Swimming pool sanitation Since hot tubs are not drained after each use it is necessary to treat the water to keep it attractive and safe. To reduce the risk of entrapment, US safety standards require that each spa have two intakes for each pump, reducing the amount of suction. A pressure system delivering water to the jets A suction system returning water to the pumps. It must be neither too alkaline nor too acidic, and must be sanitised to stay free of harmful microorganisms. Partly due to their high water temperatures, hot tubs can pose particular health risks if not regularly maintained: Heating and energy use[ edit ] Hot tubs are usually heated using an electric or natural gas heater, though there are also submersible wood fire hot tub heaters, as well as solar hot water systems. Hot tubs should also be periodically shocked, which means oxidizing or breaking down organic material left behind from the sanitizer, as well as non-filterable material such as soap films and perspiration. In the same period 18 incidents were reported to the CPSC involving body part entrapment. Some covers are better for insulation and therefore are lighter on internal parts and energy efficiency. Wooden hot tubs are often made of redwood or cedar and assembled from vertical staves and the structure is held together like wooden barrels, with metal bands. The plumbing of the hot tub consists of: There are several different styles of hot tub insulation: The Uniform Swimming Pool, Spa and Hot Tub Code is a model code developed by the International Association of Plumbing and Mechanical Officials IAPMO to govern the installation and inspection of plumbing systems associated with swimming pools, spas and hot tubs as a means of promoting the public's health, safety and welfare. They have molded seating. Some models use an air blower to force air through a separate set of jets for a different "bubbly" massage effect; this is a separate system from the induced air. The hardness level of the water, measured as the amount of dissolved calcium, is also important. A temperature of 37 degrees is considered safe for a healthy adult. Insufficient hardness can lead to corrosion and water foaming.
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