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Can anyone provide feedback on the HTP Combi Boiler, either the EFTC-144W or the EFTC-199W. I'm mainly interested in a users experience with DHW performance. For example, can it manage occasional low flow rates well, does it have any cold water sandwich issues?
According to its manual, it can recirculate internally to maintain the temperate of a small internal indirect tank (1.5gal) which sounds like it would address any low flow rate and cold water sandwich issues, but it would be great to hear from someone who has used it. Interestingly the manual also says it needs 0.5gpm to activate which is reasonable, but sounds contradictory if it's going to maintain the internal tank temperature.