Then turn the heat down and/or throw some water on the stove.
You don't have to 'induce' sweating, your body does it automatically when it gets hot and a sauna will make you hot.
No. Room plan is a blueprint. Sauna is a hot room.
Yes. Sauna doesn't get as hot as say a hair dryer.
4000000000 degrees not incredibly hot, but hot enough to make you sweat
Overheat
Everything harbors bacteria and germs. Though, if it were hot enough in the sauna, you could boil the bacteria alive and rid it of germs, but only what is boiling hot.
Not long, combustion gases (hot) generally enter the cooling system and cause the engine to overheat.
There are a few companies online that offer this service. The most highly recommended ones are called Oasis Hot Tub and Sauna, Joco and Solhem Sauna.
You can, but I wouldn't recommend it, since it is really humid and hot in sauna, and both levels are above recommended electronics use levels.
There are many ways once can do a facial sauna at home. These include using hot water in a plugged sink, a steamer (with care), or a specially designed face sauna device.
Finnish sauna doesn't have steam - Turkish sauna has steam. In Finnish sauna you sit on the bench, throw water on the stove with the ladle and sweat a lot.
Instead of using steam like in traditional saunas an infrared sauna uses infrared heaters. Both are just as hot, but some claim more health benefits from infrared.