Prex 3 GN: Heat output from 2300 to 11600 Kw Hot water boiler with three effective flue passes PREX 3GN is a hot water boiler, mono-bloc in stainless steel, with three effective flue passes, wet end plate and tube plates completely beaded, utilized for the combustion of liquid and gaseous fuels in pressurized furnace MAIN FEATURES - Heat output from 2.300 to 11.600 Kw - Standard desing pressure 6 bar (bigger pressure design on request) - Design temperature 110 °C - Design, certification and checking in accordance to PED 97/23/EC standard - Tube plates beaded with large radius of curvature that permit to render the moulding tensions/stresses useless and increase the water content - Furnace with hot-worked expansion joints at heat, without top weldings, of large dimensions for low volumetric heating load and low polluting emission. - Active exchange surfaces to guarantee a high efficiency (93%) - Insulation made up of high density mineral wool protected by a stainless steel (AISI 430) sheet and consequently limited heating dispersion - With economiser efficiency increase of 5% - Easy cleaning and completely accessibility thanks to particular design solutions - Personalization possibility of the boiler and its components in accordance to specific customer request