7 INSTALLATION 7.1 Overall dimensions Appliance with CH, DHW and gas connections backwards: Appliance + wall mounting jig + bracket Intergas Heating Ltd 20 A = Supply CH Ø22 B = Return CH Ø22 C = Gas Ø22 D = Cold tap water Ø15 E = DHW Ø15 F = Condensate drain Ø25 (flexible) G = Drain PRV Ø15 H = 840 Combi Compact HRE 36/30 & HRE 36/40 H = H = 780 720 Combi Compact HRE 28/24 Combi Compact HRE 24/18 Z = Flue pipe / air supply Ø60/100 (concentric)