Our pizza oven "Valoriani Baby" is outdoors and has not been used for 1 year. We fired it up for 3 hours, but it did not reach more than about 150°C. Can it be that it is damp inside?

It can be assumed that the fireclay bricks have drawn moisture if the furnace has not been in operation for a long time and it has also rained frequently. In this case, we recommend heating the furnace at least 2 more times for at least 3 hours to achieve drying of the fireclay bricks. Then everything should work as usual.