(1) A solar space heating system works with your existing hydronic (hot water) based heating system. The solar collectors circulate a fluid, usually a corn glycol through the solar array, where it is heated, and then transferred back to the solar storage tank.
(2) As the heated fluid is circulated through the storage tank, the storage tank's water is heated. The temperatures in the tank can reach anywhere from 130F to 175F.
(3) The hot water that is used by your existing heating system - such as in a radiant floor system - is circulated through a heat exchanger in the storage tank.
As the water passes through the heat exchanger, it is warmed, and then returned to your heating system.
This effectively keeps your heating system off - or significantly shortens the amount it runs. Your home is now being warmed by free energy provided by the sun.
(4) An added heat exchanger is often used with solar space heating systems to provide for domestic hot water as well. This is especially effective during the summer months, when the heating system is not active.
This is just one example of a solar space heating system. These systems are often designed to fit your specific application and home, and can be used to provide heat for other systems, such as for a pool.
For larger, commercial, space heating or air conditioning systems, please visit our Commercial section.