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I have a new Lochinvar WHN-199 combined with a new Squire 67 gallon indirect water heater. The Squire has a 1/2” recirc line, which is run with a Taco 006-BT4 pump (installed 10+ years ago). This Taco pump is controlled by an Intermatic switch programmed to cycle on during priority times, depending on the day of the week. Now that I can monitor the temperature of the Squire tank via the Lochinvar controller, it is clear that when the recirc line is flowing that the loss of BTU’s is relatively substantial. Might there be a more efficient pump to use on the recirc line, in place of the Taco, which would provide a lower/slower flow, while not compromising the objective of having hot water available throughout the house when needed? My thought is that a new pump on the recirc line will save both NG, due to less cycling, and electricity.
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