A.O. Smith debuts 90% efficient residential water heater

摘要

A. O. Smith Water Heater Co. has introduced its Vertex 90% efficient condensing residential water heater that the company said can produce "endless hot water." The 50-gal., 76,000 Btuh power vented unit was produced in cooperation with the U.S. Department of Energy and engineering consulting firm TIAX LLC, Cambridge, Mass.