Currently, many types of domestic solar water heater manufacturer on the market, in accordance with the types of solar collectors to distinguish can be divided into a vacuum tube and a plate; structural distinction can be divided into one and split; based on the production process,divided into pressure and non-pressure type. Currently, the most common household solar water heaters on the market mostly non-pressure vacuum tube solar home water heater. Buy home solar water heater, we should note the following:
    1.Thermal performance indicators, the average daily efficiency as high as possible, the average heat loss coefficient as low as possible.
    2.Key components of domestic solar water heaters is the all-glass vacuum solar collector tube (referred to as the vacuum tube), vacuum the tube quality direct impact to the performance of the entire domestic solar water heaters. Buy glass vacuum tube should be carefully observed pipe on the coating, the coating layer is called the solar selective absorbing coating, coating color due to the production process of the manufacturers,differ, but are generally black, dark blue or dark gray, good quality coating color uniform, the film no scratches, no peeling or shedding phenomenon, no stone or tumor in the glass, the supporting supporting pieces of glass placed in correct, not loose action.
    3.It should also be noted. Purchase the pipe spacing between the vacuum tube, usually two center distance in about 70mm is appropriate.
    4.Stent design of domestic solar water heaters should be reasonable and should have sufficient strength and stiffness (Supplementary: there is corrosion-resistant erodibility, do not use the two-year bracket down) in order to ensure that there is sufficient load-bearing capacity. In some areas of the day-to-day wind, especially in coastal areas, the product should also be noted that if there is wind resistance designed to buy home solar water heater.
    5.Currently on the market, the domestic solar water heater system reflectors form a variety of flat reflectors, curved reflectors reflectors design, embossed aluminum, the purchase should pay attention to the product can take full advantage of the heat-absorbing surface of the vacuum tube.The vacuum can be greatest extent by light. (Added: now most are not reflective panels cost savings, businesses with household products increased wind resistance, not worth mentioning)
    6. Should also be considered in the purchase of your home number of the resident population, in order to determine the purchase of a water capacity of domestic solar water heaters size. Generally appropriate standard of 40 liters of water per person. In addition, many products nominal capacity of water by calculating each vacuum pipe capacity and water tank capacity is calculated from the sum, but in fact, water heater and vacuum tube water outlet of the following can not be put out of use, users can really use to water only into the water between the outlet and the overflow port, so the election purchase should ask the sellers, their nominal capacity of water is the water capacity of full water capacity or actual use, How much difference.
    7 home solar water heater after-sales service is also very important. The best choice for a well-known brand products and after-sales service good dealer. Home solar water heaters, consumer durables, and is usually installed in the roof.