Want to buy a solar water heater, but do not know how to choose, too many varieties of goods, I do not know how to choose.
Insulation layer must be careful. The vacuum tube is pulled out, can be used in accordance with the insulation layer of polyurethane foam as a whole, if the hand by a soft feeling, then the foam, its short service life and easy to leak. If the hair is hard for polyurethane, with excellent thermal insulation performance.Depends on whether the stainless steel bracket genuine". Some water heaters say they are ultra-thin stainless steel stent, in fact, the texture is very poor, even galvanized support is not as strong. So be careful when choosing. At the same time it should be noted that, under normal circumstances, each person's water consumption is about 30-40 liters, consumers can choose according to the number of people in their own home to the corresponding capacity of the water heater.
At present, the market has at least 30 solar water heater brands, with the exception of domestic famous enterprises like Beijing Tsinghua Sunshine solar water heater production, there are some fish in the assembly of products and small factory crudely made products.
In the selection, we must see whether it is a regular factory production or assembly. It is understood that there are at least 10 brands of water heaters on the market is the assembly of goods, its quality and after-sales service, of course, can not be guaranteed.To see whether there is a vacuum tube of water heater security signs, which could make a few by filling superior vacuum tube yuanxingbilu.
