Solar collectors with multiple units ensure reliability. Low Temperature Thermal Systems . This class of systems is commercially available, and both installation and maintenance requirements are familiar to the electrical and plumbing trades. Swimming Pool Heaters . Swimming pool heaters are commonly manufactured of low-cost PVC or CPVC materials and are in the form of a simple piping loop with a circulator pump.
Controls are simple and can even be omitted in most southern latitudes.
Domestic Hot Water Heaters . Domestic hot water heaters are typically closed-loop systems used for providing potable hot water to household or commercial facilities. They come in a variety of shapes and sizes, but generally include a water-heater storage tank, either of the common household water heater type, or of a solar applications design that has an additional heat exchanger and superinsulation. The solar collectors are generally flat-plate designs that vary from manufacturer to manufacturer. These systems are simple to install, and maintenance is low.