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Can an instant heater be used inline with a tank heater? Will the instant stop heating once the tanked hot water gets to there?
Like the other guy, I wish I bookmarked more stuff.
I've seen setups where the instant heater maintains a super-insulated large tank, and starts up before the tank gets very low so as to keep hot water flow constant. For a household of commuters (students & workers) where use is at peak hours with high consumption of hot water it made sense to me to investigate.
One can add in all the other types of hot water generation as desired (solar, A/C heat exchanger, etc) to further offset costs.
One does not need 3, 4, 5, 6, small instant heaters but modifies the present plumbing system to best effect.
Granted each situation deserves careful examination, as a hot water system that has nothing to do with heating the house itself can be problematic as to cost, complexity and reliability in a hurry.
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