Descripción del producto

Product specification:

Inner tank: stainless steel SUS**4, thickness: 0.*1mm*0.5mm
Outer tank: painted steel*0.4mm/aluminum-zinc coated steel*0.*5mm/stainless steel SUS**1/stainless steel SUS **4
Vacuum tube: QB-AL-N/AL*******0/******0
*0m **0m 1.*0mm copper coils
Insulation: *0mm**0 polyurethane
Frame: coated galvanized steel*1.5mm/stainless steel SUS****1.5mm/2.0mm aluminum alloy
5L assistant tank
Accessories: intelligent controller, electric heater, magnesium bar,etc.
Characters:
1). good water quality
It use tap water directly, live water but not sedimentary water.
2) pressure endurance
The thick of coil is 1mm, which can withstand ***2 bar.
3)working automatically
A feed tank on the top, it will supply water automatically. What you need is just to open tap and have a wash.
4) no scale, high efficiency
Water in the tank wouldn't be used just to heat the coil, the water in the tank will keep hot and no scale. The vacuum tubes will be kept clean, and system has a higher efficiency than normal system. 
5) anti-freezing
Because of all hot water in main tank, the feed tank won't be frozen. It can be working well in **0deg.C.
6)good performance in rainy & cloudy days
When tap water comes in and out, it will be just 3deg.C less than water in tank. Viz. if *0deg.C in tank, the outlet water will be at *7deg.C after exchanging. 
If tank water is *0deg.C, and you catch rainy days, no problem, if you use *0L *0deg.C water per day, you can keep getting such hot water for *5 days!!
The electric heater is only backup, we don't use it anytime practically, except in winter.
7)more capacity
Because the water in tank doesn't be used, in fact the circulation is not only water in the tank but also water in the tube. So for example **0L, actually it has **0L in whole system.
Principle:
The vacuum tubes absorb the suns rays and turn the rays into energy, heating the water in the tubes. As the temperature of the water is rising, The density turns slightly, then the hot water in the tubes floats into the tank, and the cold water in the tank goes down to the tubes. Keeping natural cycling like this, the water in the tank will be heated.
  The vacuum tubes heat the water in the tank, but the users do not use the water in it directly. The cold water comes into the exchanger from one side and the hot water heated by the exchanger, and then the hot water comes out from the other side for use.