DIRECT Configuration Unit serves as collector + self-contained storage No control valve needed Application: functions as stand-alone system if backup is not required Toll-Free Tech Support
2-WAY Configuration Includes Standard Kit + complete plumbing kit 2-way selection valves Application: functions as a pre-heat system used w/backup water heater Reduce Energy Costs!!!
3-WAY Configuration Includes Deluxe Kit + 3-way selection valves Application: functions as a stand-alone system or a pre-heat system used w/backup water heater Utilizes FREE Energy!!!