You may use the sauna as much as you like.
The cost of electricity is approx 7-10 SEK an hour which will be charged over the electricity bill.
Turn on the sauna (in the hallway) about 15 minutes before use. The timer can be set from 1-4 hours.
You can turn off the power when you exit the sauna – that will save you some electricity.
You are NOT allowed to pour water on the stove!