When solar energy is used for heating, efficiencies upwards of 75% are possible, compared with approximately 15% for the best PV cells when making electricity. Since heating devices also consume the largest amount of current, using solar heating for the home offers the maximum potential for payback. Concentrated solar heat allows much higher operational temperature and better efficiency.
Since CSP can easily boil water, designing a CSP heating system requires some extra attention to detail. It's really the same thing as building a small scale boiler. Boiler systems are based on the science of water systems is called hydronics. Many normal industrial scale boiler features need to be incorporated into our home CSP design, in a way that doesn't blow the budget. Here are a few key things to keep in mind when designing a system that can reach boiling temperatures: