05/11/2026
Heating with oil or propane?
The Fröling S3 Turbo is a high-efficiency indoor cordwood boiler designed for modern hydronic heating systems. Manufactured by Fröling in Austria since the 1960s, the S3 Turbo combines advanced wood gasification technology, low emissions, and thermal storage integration for clean, efficient, and comfortable wood heating.
Unlike traditional outdoor wood boilers, the S3 Turbo is designed to burn hot and clean while storing excess heat in insulated thermal storage tanks for consistent system performance and improved efficiency.
Froling Wood Boilers works with homeowners and local installers throughout the U.S. to help design and commission complete cordwood boiler systems.