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Water Heaters: Tankless vs Traditional
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<blockquote data-quote="guywhofishes" data-source="post: 333521" data-attributes="member: 337"><p>OK, so here's a graph of what happened with the gravity loop.</p><p></p><p>[ATTACH]52350[/ATTACH]</p><p></p><p>I was using about 5 kwh/day for the hot water heater. After installing the gravity loop (Dec 16 or so) you can see the energy use jumped to nearly 3 times as much. I thought that was a bit much - how to achieve a happy medium???</p><p></p><p>I bought a this $31 controller for reptile cages, etc. </p><p><a href="https://www.amazon.com/gp/product/B01486LZ50/?tag=nodakangler10-20" target="_blank">https://www.amazon.com/gp/product/B01486LZ50/?tag=nodakangler10-20</a></p><p>On March 21 or so I placed the temp sensor of the Inkbird on the return gravity loop near the heater. I hooked the Inkbird controller up to one of those zone valve controllers for boilers that I installed into the return ($70 ebay).</p><p></p><p>The zone valve opens until the return water gets to 90F, then it closes until it drops down to 85F, then re-opens. This is equivalent to those water circulators that monitor temperature and don't get carried away by circulating unnecessarily. </p><p></p><p>In addition, this $31 Inkbird controller allows you to set what time you want to be controlling or not (so lizards etc. experience cool nights). So I set it to start allowing the gravity loop at 5 am and end the gravity function at 8:00pm (I think those are the times... it's all programmable but forget)</p><p></p><p>Anywho... it looks like I might be saving 5 kwh/day which at .069/kwh is $10/month - by not running the loop at night when it's not needed. So the $120 bucks or so I spent on controlling the loop will be paid off in a year? I suck at math so I could have this all muffed up. Ha ha.</p><p></p><p>-guywhoisOCDsometimes</p><p></p><p><span style="color: silver"><span style="font-size: 9px">- - - Updated - - -</span></span></p><p></p><p>So the final system sent my hot water usage from something around $17/month to maybe $27 or so. I can live with that - especially in winter when heat is heat - it doesn't get wasted. Summer is a different animal.</p></blockquote><p></p>
[QUOTE="guywhofishes, post: 333521, member: 337"] OK, so here's a graph of what happened with the gravity loop. [ATTACH=CONFIG]52350._xfImport[/ATTACH] I was using about 5 kwh/day for the hot water heater. After installing the gravity loop (Dec 16 or so) you can see the energy use jumped to nearly 3 times as much. I thought that was a bit much - how to achieve a happy medium??? I bought a this $31 controller for reptile cages, etc. [URL]https://www.amazon.com/gp/product/B01486LZ50/?tag=nodakangler10-20[/URL] On March 21 or so I placed the temp sensor of the Inkbird on the return gravity loop near the heater. I hooked the Inkbird controller up to one of those zone valve controllers for boilers that I installed into the return ($70 ebay). The zone valve opens until the return water gets to 90F, then it closes until it drops down to 85F, then re-opens. This is equivalent to those water circulators that monitor temperature and don't get carried away by circulating unnecessarily. In addition, this $31 Inkbird controller allows you to set what time you want to be controlling or not (so lizards etc. experience cool nights). So I set it to start allowing the gravity loop at 5 am and end the gravity function at 8:00pm (I think those are the times... it's all programmable but forget) Anywho... it looks like I might be saving 5 kwh/day which at .069/kwh is $10/month - by not running the loop at night when it's not needed. So the $120 bucks or so I spent on controlling the loop will be paid off in a year? I suck at math so I could have this all muffed up. Ha ha. -guywhoisOCDsometimes [COLOR=silver][SIZE=1]- - - Updated - - -[/SIZE][/COLOR] So the final system sent my hot water usage from something around $17/month to maybe $27 or so. I can live with that - especially in winter when heat is heat - it doesn't get wasted. Summer is a different animal. [/QUOTE]
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