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Recreational Mechanic
Join Date: Sep 2000
Location: Northern Colorado, USA
Posts: 3,326
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My Dad installed a Rinnai in a house he built about 10 years ago. After a couple years he added a small electric water heater, fed by the Rinnai, and a circulating pump that was set on a timer. This pump would circulate hot water (heated first by the Rinnai, then kept warm by the small electric tank heater). During the times he needed hot water at the far end of the house (dinner, shower time, etc) it would circulate hot water so it was available on demand. The Rinnai would only run when the small electric tank heater called up for hot water, so it would not run the tankless all the time. He did have to run a return line or two in the house so the hot water plumbing was a loop for circulation purposes.
I thought this was pretty ingenious. Dad's plumber thought so too and he has installed this setup on several houses in the area since then.
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P Cars: 2022 Macan GTS / One empty garage space ---- Other cars: 2019 Golf R 6MT / 2021 F-250 Diesel / 2024 Toyota GR86 6MT ---- Gone: 1997 Spec Boxster Race Car, 2020 GT4, 2004 GT3, 2003 Carrera, 1982 911SC, 2005 Lotus Elise and lots of other non-Porsches
PCA National DE Instructor #202106053 / PCA Club Racing / WRL Endurance Racing
Last edited by Nickshu; 05-23-2018 at 05:07 AM..
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