How to choose a wall-hung boiler?

Gas wall-hung boiler, the main function is to provide domestic heating and hot water. When choosing a wall-hung boiler, just pay attention to the following details:

1. Imported boilers: ask for customs declaration, commodity inspection certificate, trademark certificate, etc. Prove that the batch you bought is made abroad.

2. Household boilers: the most important accessories: brands and origin of circulating pumps, fans, gas valves and control panels.