Lindner & Sommerauer wood chip boilers, models SL 49 T 4R, SL 50 T 4R, SL 65 T 4R, SL 80 T 4R, SL 99 T 4R, SL 110 T 4R, SL 150 T 4R, SL 199 T 6R, SL 200 T 6R and SL 250 T 6R,