Consisting of:1x Atmos P21 pellet boiler (4 - 19.5 kW), with A25 pellet burner and 1.5 m screw conveyor (90 888 82)1 x System manager PM3 (buffer charging) (90 827 38)1 x flue tube, ø 150 mm, adjustable from 0° to 90° (33 013 29)1 x draught regulator, for mounting on the flue tube 150 mm (33 003 ...