The ProLine® 120-gallon indirect solar booster water heaters are specially designed for installation as part of closed loop solar water heating system. The SUNX-120 provide storage for the hot water produced by the solar panels and a supplementary for water produced by the solar panels and a supplementary electric heating element that maintains consistent water temprature during periods when solar energy is not available. Count on A. O. Smith for innovative products that provide hot water solutions for residential renewable energy applications.

Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings.

This ProLine® water heater is designed with A. O. Smith's superior commercial-grade tank protection. Advanced tank features include stainless steel CoreGard™ anode rod, Blue Diamond® glass lining and DynaClean™ automatic sediment-cleaning system, all designed to help protect the tank from the corrosive effects of water and extend the life of the water heater. This model also includes built-in Dry-Fire protection to protect the heating elements from damage during initial start up. All of these features are accompanied by a 6-year limited tank warranty.

A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.