Central Heating Central System Boiler YTP-Y3G (232-2326 KW) Central System Boiler YTP-Y3G-K (232-1160 KW) 4-Pass-Stoker Fired Heating Boiler YTP-4G (116-581 KW) Natural Gas Fired and Liquid Fuel Heating Boiler YT-3G (116-931 KW) Solid Fuel Central System Heating Boiler YTK-Y3G (232-930 KW)