How to distinguish between good and bad
Two weigh weight: water tank is very important for water heater. General weight of the water tank is good quality. The weight is mainly determined by the material of the water tank shell and the foaming layer between the water tank shell and the water tank liner.The general poor water tank, the outer housing is made of shiny stainless steel (the big city has banned the use of water heater made of this material because of the existence of light pollution), and the shell thickness is not enough, the weight is light.
A vacuum tube: vacuum tube is the most important part of the solar water heater, there is a thick pipe (usually 58mm diameter) and a thin tube (usually 47mm diameter) points. Relatively speaking, thick tube heat collection area, fast heat collection, high water temperature, so the choice should be given priority to the use of solar water heater tube.A single drone and drone three two main manufactured materials, the quality of the three target is better, when consumers buy the appearance identification. Single target vacuum tube color is gray, color, and inner wall of vacuum tube is light black; and three drone vacuum tube appearance blue, no color difference, the inner wall is dark red.
There are many kinds of water heater, which can be divided into vacuum tube type and flat plate according to the type of solar collector, which can be divided into integral type and split type according to the structure. At present, most of the domestic solar water heaters sold in the market are mostly non pressure vacuum tube type solar water heater. General:
