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START | wall-hung condensing boilers VIEW FROM ABOVE VIEW FROM BELOW DIN HYDRAULIC CONNECTIONS FLOW F DHW OUTLE T O GAS G DC W INLE T I RE TURN R F O G I R TECHNICAL DRAWINGS B23P-B53P FLUE OPTIONS > FLANGE INSTALLED AS STANDARD > QUICK INSTALLATION WITHOUT THE NEED FOR AN EXTERNAL COLLAR > BOILER DEPARTURE WITH RIELLO SPECIFIC FLUE OPTIONS 80-80A 80-80B 80-8 B23P-B53P 80-80A 80-80B 80-80A 80-80B 80-80C 80-80A 80-80B 80-80C 80-80A 80-80B 80-80C CONCENTRIC FLUE Ø60-100 mm CONCENTRIC FLUE Ø80-125 mm FLUE TYPES B22P- B52P TWIN FLUE Ø80-80 mm TWIN FLUE Ø80-80 mm with ADAPTER TWIN FLUE Ø80-80 mm with COMPACT ADAPTER 80 . 5 °C 10