Quote:
Originally Posted by j-c-c
I'm toying with the complexities of using my RV engine coolant to pre heat my RV's potable water tank while driving, allowing my shower point of use water heater to be downsized by having slightly above ambient water temp to heat.
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I remember reading something about a Brazilian family who used a Peugeot Boxer motorhome with an exhaust-heated water tank. Nobody would take a shower with the vehicle running, so it had to be well insulated to retain the waste heat for a while.