Cirrex, from A. O. Smith, is a leap forward in solar thermal water heating and one of the “greenest” solutions available to homeowners today. Up to 70% of its energy comes from the sun, significantly reducing homeowners’ utility bills, in addition to helping protect the planet. Cirrex is available in 16 packaged systems, which simplifies specification and installation for the contractor. Its solar thermal collectors can generate as much energy as traditional PV solar panels at one-eighth the cost. Tank sizes range from 76 gallons to 120 gallons. With Solar Energy Factors up to 10.1, the Cirrex system is ENERGY STAR-qualified and eligible for a federal tax credit of 30% of the entire installation cost.