WATER PRESSURE. 0.5 bar 1/4 -Model: ARENA 20C, DOMICOMPACT F24B, DOMINA 80E, GN4 - C.O. I39806180 … Installing-n output humosAntes choosing a boiler must know how c-mo is to be installed vent and ask boiler model that best suits your necesidades.Una decided on the vent , the next step be confirmed ‡