After all, every person who has no experience about a subject will look for information. The same is in this case. If you begin to show interest in saunas, this ABC will have answers to most of your questions.
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What is the difference between a sauna and an infrared cabin?
We will start our ABC by answering this question. All in all, the only similarity is the heat your body receives, while there are plenty of differences.
Heater is the thing which heats the sauna, and the temperature swing between 60 degrees to 105 degrees Celsius. Warm air heats the body and the more time you spend inside, the more heat you absorb, and the more your body sweats. The temperature of the body rises.
Infrared cabin works a bit differently. Short wave lights heat the skin directly, and the room temperature goes up to just 35 degrees Celsius. After you leave the room, take some time to cool off.
As you can see, sauna is meant for relaxing, skin cleansing, etc., whereas infrared cabin is great for people who have rheumatic problems and want their muscles to become more relaxed.
Do saunas require a lot of energy?
Not necessarily. Small rooms of about 4 squared meters will be fine with heaters of 220 volts. On average, you need 0,3 - 1 kW heat power for one cubic meter.
How long do saunas last for?
This question arises quite often as people begin to wonder whether it is worth investing money into sauna in the first place. It comes down to the quality of materials you use to build the sauna. If the materials are good, a sauna can last for up to 25 years, even more.
Of course, if the sauna is used often, the lifespan becomes shorter. In this case, you would be better off renovating the sauna whenever you see that there are potential problems.
What sort of maintenance is necessary for saunas? 
Everybody can agree that saunas have to be clean, first and foremost. And here are a few extra tips to make it all better:
Door sealants have to be in great condition to prevent heat leaving the room. As soon as they stop functioning, replace them.
Worn out sauna stones should be replaced every year, and every 5 years you should replace all the stones. For saunas that are used every day replace their stones once every three months.
Benches need to be hard and have a solid construction. If they are not, replace them.
Infrared and electric heaters require a yearly cable check maintenance.
How to keep the room clean?
We recommend to not use water hose. Spraying water means that the water will remain in the sauna. It is best to use a mop and a special disinfectant for saunas. The same method applies to plastic or wooden sauna mats.
If you want to avoid wood in the sauna from rotting, use paraffin oil. It prevents humidity and should be applied at least once every year.
How long does it take for the sauna to heat up to the right temperature?
Depending on the materials quality, isolation, heater power, etc. it should not take more than half an hour. It comes down to the thickness and type of timber. The bigger the volume, the more heat it retains. On one hand, it will increase the time, while ensuring that the temperature is consistent.
Thin timber (around 16 mm) means that it does not take as long to heat, but it will cool off faster as well. Massive timber (around 22 mm) takes longer, which is a plus for professional saunas, but a minus for private use.
The same can be said about the amount of stones on the heater. The more stones you have, the longer it will take. Usually, 9 to 12 kilos is more than enough for a regular sauna. Professionally made saunas might have more than this amount.
What is the ideal temperature?
It comes down to the individual. The more often you use sauna, the easier it will be to find the perfect temperature for yourself. With humidity or without it. The lower the humidity, the easier it is to persevere high temperature.
The temperature depends on how high or low you are in the room. The higher you sit or lay, the higher the temperature, and vice-versa.
Do saunas improve your body's natural resistance? 
Absolutely. If you use sauna every week, you should notice the improvements to your health. The swings of temperature strengthen the body. Sweating helps get rid of toxins, so it becomes easier to fight against various diseases.
Do saunas help with losing weight?
We say that this is nothing more than a myth. During the stay in the sauna we will lose a lot of body fluids, but we will replace them later. If you try to weight yourself immediately after leaving the sauna, you will see that the weight is lower. But it will be back soon.
If you want to lose weight, start to regulate your diet and begin to work out.