The best for filling is to take a garden hose and fill the wooden hot tub up to 4/5 with water. There must be at least 3 cm of water above the stove before it is allowed to start heating the furnace.
Please be careful with fire, fire can cause irreparable damage!
While heating, the hot tub must always be filled with water.
You can use the water from the lake, from the river or the sea.
The water is heated up to +35 to +38 degrees in Celsius.
The barrel should be emptied after the furnace has cooled down. It`s not necessary to empty the barrel every day, but only as needed.