A rated efficiency class Height; 700mm Width; 390mm Debth; 285mm Weight; 29kg Maximum Total Distance for flue (Vertical + Horizontal combined) 60/100 flue ; 10 meters* 80/125 Flue ; 20 meters* *(Deduct 1 meter from maximum total distance for every additional 90 degree elbow added) *(Deduct 0.5 meters from maximum total distance for every additional 45 degree elbow added) Maximum total distances if using twin pipe flue system 15 meters Horizontal* 15 meters Vertical* *Deduct 0.5 meters every 90 degree elbow used *Deduct 0.25 meters for every 45 degree elbow used Maximum heat central heating output - 26.95 KW Maximum hot water flow rate @ 35C - 10.2 liters per minuite Maximum Gas rate - 2.76 m3 per hour Gas pipe connection - 22mm 8 litre expansion vessel 125 litre central heating capacity 24 hour pump excercise pump overrun frost thermostat Built in filling loop