Data from the schweizerischen Holzenergiestatistik show that the number of installations of categorie 1 to 5 (single room heating appliances) grows by typically 2% per year.
The situation for small automatic heating systems is similar, as can be derived from the Schweizerische Holzenergiestatistik. The increase is mainly caused by installation outside of wood processing industries.
updated
21. July 2006