60 / 68 hwam 17/18 s 60 all drawings: the measurements for the flue outlet and fresh air connection have been given to the centre of the hole. technical data capacity 3-8 kw nominal heat output 8 kw smoke outlet ø 150 mm net efficiency autopilot? 79% chimney draught, min. (recommended) 12 pa energy efficiency class autopilot? a weight weight 108 kg weight with