Schlagmann Poroton has introduced a two-shell ceramic chimney system designed for space-constrained applications. The compact design addresses demand in retrofit scenarios and modern residential construction where floor space is at a premium. Two-shell chimneys combine an inner flue liner with an outer shell, meeting requirements for condensing boiler installations and multi-fuel compatibility. The system is suited for both new-build and renovation projects where conventional chimney footprints are impractical.