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I'm redoing our masterbath and replacing the old tub shower combo with a glass enclosed tiled shower and bench. I am concerned about the surface temp of the bench. I'm going to be adding a dedicated hot water return for instant hot water as part of the project using a pump powered by the light switch. (We're retired so a timer is out.) The instant hot water system will only be for the master bath.
I'm considering embedding some 1/4" pex loops under the bench top tiles in the modified thinset and running my instant hot water return through the pex loops as a low budget bench heating system. I'm not sure if the water temp will be too high? Or if there's anything else that I'm not considering with this idea. Thanks for any comments.