Like any custom design, you may find that the design parameters weren't quite right and the solution requires a bit of in-field adjustment.įollowing is just one approach of many. You're going off the well-beaten path, though, so a bit of design (aka engineering) will be necessary. You can save a little space and energy by using an electric instant heater to supplement the hot water stored in the tank. With that one can estimate whether it's even possible to get there from where you're at, and if so, how many tank water heaters you should have in service. You'd do a bit of math to figure out how many gallons you want to be able to consume in a window of time and how much recovery time you'll allow for the heaters to come back up to temperature before the next demand cycle hits. The simplest thing is to add more electric-fuel tank for heating and storing water. Is there anything like a thermostatic mixing valve (but the opposite) that can use water from a secondary supply line if the main supply line (in this case the tankless heater) falls below a certain temperature?.Alternatively could we feed the tankless heater into the hot water supply line?.
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