![]() 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?.Are there any models that can take hot water effectively as a pass-through to augment hot water demands?.I'm wondering if there's a way for the on tankless heater to leverage hot water from the tank when it's unable to meet the GPM demands. I may be overthinking this and the laundry may be able to run on cold water alone (verifying with the manufacturer), but electric hot water heaters are pretty limited and it's unlikely we'd even be able to run the shower and tub at the same time from what I understand. We will be moving our laundry into the master bathroom (there is already a supply line and 240V connection), we'll have a freestanding tub and a shower. The problem is we are on oil so we're limited to electric tankless water heaters which have limited GPM. ![]() ![]() ![]() Our current 50 gallon hot water tank runs out after about 2.5 consecutive showers. We are doing a master bathroom renovation and are considering adding a tankless hot water heater to supply just that bathroom. ![]()
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