There is rust on the stove body. Is this normal, and does it affect the product?
Some rust may form on the stove body soon after it is put into use. This is normal for a wood-burning stove and does not cause any harm to the product or users. Any rust spots remain hidden under the stones or the sauna heater’s casing.
The black exterior (outer casing or stone cage) of the stove should remain rust-free for a long time. This also applies to the glass door and ash pan.
Below is a model of the sauna stove body, which has accumulated more rust over time. Despite surface rust, the stove body may still be in good condition.
The image below shows the areas of the body where surface rust typically forms. Sauna heater model: Legend 240 Greenflame.
Can I prevent my sauna stove from rusting?
Yes. Make sure the sauna dries thoroughly after each use. You can make the drying process more effective by adding a few logs to the stove at the end of your sauna session. Leave the ashpan slightly open so the logs burn evenly until they’re completely gone.
A sauna room that remains damp for long periods of time promotes rusting of metal parts and causes the wooden surfaces to deteriorate. Ensure adequate ventilation and air circulation, including after each sauna session!
Related: Protective paint on new stoves
The stove body (under the outer casing or stone cage) has been painted with protective paint that peels off during the first heating. This will cause the stove body to emit smoke. When the smoking stops, the stove is ready for normal use. However, the paint on the outer casing should not peel off, but it may change color slightly.
More information here: Why is the black paint on my new stove peeling or flaking?