Fixing a Hot-Water Problem
It could be a case of unrealistic expectations, or possibly a flawed plumbing design. In either case, John Metcalfe has discovered that installing a pair of tankless water heaters in his San Francisco house has done anything but solve his hot-water delivery problems.
In a post at GreenBuildingAdvisor’s Q&A Forum, Metcalfe laments that even with the new heaters plus a recirculation pump, there is a two-minute wait for hot water at the kitchen sink or at an upstairs shower. What gives?
Tankless heaters will mean a slightly longer wait than would be the case with a conventional tank heater, says GBA senior editor Martin Holladay, but Metcalfe may see some improvement by making sure the recirculation pump is activated by a switch in the kitchen or bathroom. Moving the heaters closer to where hot water is needed also would help.
Others question a key detail of the plumbing system: the new tankless heaters are connected in series. More than one GBA reader finds the arrangement puzzling.
Metcalfe’s hot-water woes, and some possible solutions, are the focus of this Q&A Spotlight.