Our 4 gal isotemp is also performing well. It is installed in the center of the floor over the spare tire. A detailed write-up with pics is here:
Marine Style IsoTemp Spa Van Water Heater Install in our Promaster: Hot water was a non-negotiable in our DIY RV Van design. You can see from our floor plan that we had designed a wet bath with a shower, and this definitely required a hot water heater installation in the DIY RV. We considered on...