Editing Sauna (section)

==Technologies==
Today there is a wide variety of sauna options. Heat sources include wood, electricity, gas, and other unconventional methods such as solar power. There are wet saunas, dry saunas, [[infrared sauna]]s, smoke saunas, and steam saunas. There are two main types of stoves: continuous heating and heat storage type. Continuously heating stoves have a small heat capacity and can be heated up on a fast on-demand basis, whereas a heat storage stove has a large heat (stone) capacity and can take much longer to heat.

===Heat storage-type===
====Smoke sauna====
[[Smoke sauna]] (Finnish ''savusauna'', Estonian ''suitsusaun'', Võro ''savvusann'') is one of the earliest forms of the sauna.<ref name="Sweat1978" /> It is simply a room containing a pile of rocks but without a chimney. A fire is lit directly under the rocks and after a while, the fire is extinguished. The heat is retained in the rocks, and the earlier fire becomes the main source for heating the sauna. Following this process, the ashes and embers are removed from the hearth, the benches and floor are cleaned, and the room is allowed to air out and freshen for some time. The smoke deposits a layer of soot on every surface, so if the benches and back-rests can be removed while the fire is alight the amount of cleaning necessary is reduced. Depending on the size of the stove and the airing time, the temperature may be low, about {{convert|60|C}}, while the humidity is relatively high. The tradition almost died out in Finland but was revived by enthusiasts in the 1980s. These are still used in present-day Finland by some enthusiasts, but usually only on special occasions such as Christmas, New Year's, Easter, and ''juhannus'' ([[Midsummer]]).<ref name="Birt 1988" /> Smoke saunas are popular in the southern Estonia and smoke sauna tradition in [[Võrumaa]] was added into UNESCO Intangible Cultural Heritage Lists in 2014.<ref name="news.err.ee">[https://news.err.ee/114404/smoke-sauna-tradition-in-vorumaa-added-to-unesco-intangible-cultural-heritage-list "Smoke sauna tradition in Võrumaa added to UNESCO Intangible Cultural Heritage List"] ERR, 27.11.2014</ref>

<gallery>
File:Smoke sauna stove Utsjoki.JPG|''Smoke sauna'' stove
File:Leppoja keris.JPG|''Smoke sauna'' stones
</gallery>

====Heat storage-sauna====
The smoke-sauna stove is also used with a sealed stone compartment and chimney (a heat storage stove) which eliminates the smoke odor and eye irritation of the smoke sauna. A heat storage stove does not give up much heat in the sauna before bathing since the stone compartment has an insulated lid. When the sauna bath is started and the ''löyly'' shutter opens a soft warmth flows into the otherwise relatively cold ({{convert|60|C|F|disp=semicolon}}) sauna. This heat is soft and clean because, thanks to combustion, the stove stones glow red, even white-hot, and are free of dust at the same time. When bathing the heat-storage sauna will become as hot as a continuous fire-type sauna ({{convert|80|–|110|C|F|disp=semicolon}}) but more humid. The stones are usually durable heatproof and heat-retaining [[peridotite]]. The upper part of the stove is often insulated with rock wool and firebricks. Heat-storing stoves are also found with electric heating, with similar service but no need to maintain a fire.

<gallery>
File:Heat Storage Sauna Stove.jpg|''Heat storage'' type sauna stove stone compartment
</gallery>

===Continuous heat-type===
====Continuous fire sauna====
A continuous fire stove, instead of stored heat, is a relatively recent invention. There is a firebox and a smokestack, and stones are placed in a compartment directly above the firebox. It takes a shorter time to heat than the heat-storage sauna, about one hour. A fire-heated sauna requires manual labor in the form of maintaining the fire during bathing; the fire can also be seen as a hazard.

Fire-heated saunas are common in cottages, where the extra work of maintaining the fire is not a problem.

==== Electric stove sauna ====
The most common modern sauna types are those with electric stoves. The stones are heated up and kept on temperature using electric heating elements. There is a thermostat and a timer (typically with eight hours' maximum delay time, followed by one hour's continuous heating time) on the stove. This type of heating is generally used only in urban saunas.

==== Far-infrared saunas ==== 
Far-infrared saunas utilize infrared light to generate heat. Unlike traditional saunas that heat the body indirectly through the air or by conduction from heated surfaces, far-infrared saunas use infrared panels or other methods like a sauna blanket<ref>{{Cite web |title=The Far-Infared Sauna Blanket |url=https://saunablanket.net |last=Publishing |first=Sauna Blanket |website=Sauna Blanket |access-date=2022-05-14}}</ref> that emit far-infrared light, which is absorbed by the surface of the skin. The heat produced by far-infrared saunas is generally lower, making it more tolerable for people who cannot withstand the high temperatures of traditional saunas.<ref name="pmid19602651">{{cite journal | author = Beever R | title=Far-infrared saunas for treatment of cardiovascular risk factors: summary of published evidence | journal= [[Canadian Family Physician]] | volume=55 | issue=7 | pages=691–696 | year=2009  | pmc=2718593 | pmid=19602651}}</ref> Infrared heat penetrates more deeply into fat and the neuromuscular system resulting in a more vigorous sweat at lower temperature than traditional saunas.<ref name="pmid19602651" /> These effects are favorable for the neuromuscular system to recover from maximal [[Endurance training|endurance exercise]].<ref name="pmid26180741">{{cite journal | vauthors = Mero A, Tornberg J, Mäntykoski M, Puurtinen R | title=Effects of far-infrared sauna bathing on recovery from strength and endurance training sessions in men | journal= [[Springer Science+Business Media|SpringerPlus]] | volume=4 | pages=321| year=2015 | doi= 10.1186/s40064-015-1093-5 | doi-access=free | pmc=4493260 | pmid=26180741}}</ref>