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<blockquote data-quote="Maddog" data-source="post: 333493" data-attributes="member: 5355">Thumbs UpI know you wrote that earlier, but didn't know if that is what you meant.Now with the picture it makes perfect sense.Thanks&lt;&gt;&lt;&gt;&gt;&lt;&gt;&lt;&gt;What are your thoughts on &quot;running&quot; cost?&nbsp; - comparing the following:1) old way of running the faucet for &quot;90&quot; seconds waiting for hot waterVS2) your newly installed base, with the water heater having to do more heat cycles&nbsp; (maybe that isn't true ??&nbsp; as when you run for 90 seconds, you need more heat too.&nbsp; Guess the question is the perceived cost of additional heat loss by making it cycle more)(perhaps, also cost of additional plumbing - how long will it take to recoup those costs?)Just looking at costs -- not nicety of &quot;instant&quot; hot water.&nbsp; Understand I am a tight, old bastard, who pinches my pennies. : )&nbsp; &nbsp; And I have patience for 90 seconds, do I like that, no.&lt;&gt;&lt;&gt;&lt;&gt;You had mentioned cold water being heavier than hot water.&nbsp; I get that but isn't that such a small factor in the relatively small volume you are talking about.&nbsp; Isn't it more about thermal transfer -&nbsp; meaning hot always flows to cold -- and with your water heater below (?) your faucets the heat will always rise more easily to that high point.&nbsp; Now you have introduced the potential for flow.&nbsp; So not only do you just have conduction but you also have flow convection?&gt;&lt;&gt;&lt;&gt;Did you consider an in-line heater close to your outlet?&nbsp; I didn't look into it.&nbsp; But don't they make something that only heats when there is flow?[ATTACH]51066[/ATTACH]</blockquote>

[QUOTE="Maddog, post: 333493, member: 5355"] Thumbs Up I know you wrote that earlier, but didn't know if that is what you meant. Now with the picture it makes perfect sense. Thanks <><>><><> What are your thoughts on "running" cost? - comparing the following: 1) old way of running the faucet for "90" seconds waiting for hot water VS 2) your newly installed base, with the water heater having to do more heat cycles (maybe that isn't true ?? as when you run for 90 seconds, you need more heat too. Guess the question is the perceived cost of additional heat loss by making it cycle more) (perhaps, also cost of additional plumbing - how long will it take to recoup those costs?) Just looking at costs -- not nicety of "instant" hot water. Understand I am a tight, old bastard, who pinches my pennies. : ) And I have patience for 90 seconds, do I like that, no. <><><> You had mentioned cold water being heavier than hot water. I get that but isn't that such a small factor in the relatively small volume you are talking about. Isn't it more about thermal transfer - meaning hot always flows to cold -- and with your water heater below (?) your faucets the heat will always rise more easily to that high point. Now you have introduced the potential for flow. So not only do you just have conduction but you also have flow convection? ><><> Did you consider an in-line heater close to your outlet? I didn't look into it. But don't they make something that only heats when there is flow? [ATTACH=CONFIG]51066._xfImport[/ATTACH] [/QUOTE]

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