Glazed solar collectors are similar to domestic hot water heating systems but they are not normally used to heat swimming pools. Glazed collector systems are generally made of copper tubing on an aluminum plate with a sheet of glass covering to prevent heat loss but it increases their cost. They can be two to three times more expensive per panel than unglazed solar panels. In addition to high costs, high levels of chlorine, or having a salt-water pool, can be extremely corrosive to the copper piping inside glazed panels. But if you plan to use your solar pool collectors in colder climates, or they need to operate all year-round even in sub-zero temperatures, you will probably need glazed collectors.
Before you purchase and install a solar pool heating system you need to determine the size of the collectors. Basically, you should take into consideration the following factors:
- your pool’s location and size
- average regional temperatures
- desired pool temperature
- all year-round uses or uses restricted to a part of the year
- the system’s type, model and efficiency