A.O. Smith water heaters with X3 scale prevention technologyA. O. Smith launched its concentric vent non-condensing tankless water heater line with X3 scale prevention technology. The technology ensures uninterrupted functionality, eliminates the need for scale-related maintenance and extends the lifespan of tankless units three times longer than unprotected units. Designed to meet the needs of industry professionals, the X3 simplifies installations thanks to contractor-preferred concentric venting. The unit accommodates long venting runs and features quick natural-gas-to-propane field convertibility for added flexibility. 800-527-1953; www.hotwater.com
