As an importer, how can you find a real manufacturer from China when purchasing ultra-thin floor-standing vertical fan coil units from China? How to ensure that

As a dealer, you need to know how to calculate the required cooling and heat in the room? I will explain to you in detail,

Concealed fan coil unit and exposed fan coil unit. The concealed fan coil unit is including the following type: vertical concealed fan coil unit, horizontal