Can be from the wall-hung boiler "product serial number" to determine the Bosch wall-hung boiler when imported, or domestic, in the product box, as well as the wall-hung boiler equipment on the sticker on the logo to view the product serial number, the product serial number consists of four parts, of which the first part of the "wall-hung boiler products The first part is the "factory code of the wall-hung boiler product", "8290" for Turkey, "3290" for the Netherlands, "2750" for Shanghai.
Now Bosch is basically Shanghai production assembly, now imported wall-hung boilers and domestic difference is not very big, because all the wall-hung boilers are assembly plant, water pumps, solenoid valves, heat exchangers are purchased from other factories, all the wall-hung boiler factories do not produce, so the quality of the difference is not very big.
Extended information:
1, model labeling: most of the international use of the output power to do for the model labeling, the domestic wall-hung boilers using the input power. For example, the domestic model labeled L1PB20, is the input power 20KW, the output power of 18.5KW or so. European imports of wall-hung boilers labeled L1PB20 model, the input power is 21.5 or so, while the output power is 20KW.
2, thermal efficiency: domestic wall-hung boilers thermal efficiency is a little lower, the European wall-hung boilers thermal efficiency is a little higher, this is because of the different manufacturing standards, the European standard is higher than the national standard, the same power wall-hung boilers, the higher the thermal efficiency, the more fully combusted, the same amount of heat, the more gas saving. The same amount of heat is the more gas saving.
3, the source of parts and service life: European parts production standards are high, long service life, the failure rate is lower, the price is high. Domestic parts prices are low, but the production standards are a little lower. But the domestic supply of parts and components is sufficient, with good. In recent years, the quality of domestic parts and production level has improved greatly, the domestic more formal factory production of wall-hung boilers and European production gap is gradually narrowing.