He inquired about my tankless

Best way to hook up 2 hot water heaters

At the very least, lowering the maximum temperature of the upstream unit would lower the change of inadvertently generating scalding water. The tankless unit could be of moderate capacity and still work well, be more efficient and reliable than a second tank unit. Just one more option to consider. We tried again after half an hour, same thing.

You connect them with the tankless

Even if you turn off the hot water, then back on, you'll get hot, followed by cold, by warm and then eventually hot again. This would be essentially equivalent to a standard tank water heater with an increased the recovery rate or first hour rating.

The unanswered question so far is how to set the thermostats in the two so one does not assume all the load. You connect them with the tankless unit first. If you go that route you may as well go with one sized for the application. Another way to think of it is the tankless unit is acting as a supplemental hot water system that supplies pre-heated hot water to the tank unit.

The unanswered question so far

Being an owner of a tankless wh only from a practical standpoint, I have to disagree. The whole house has copper supply lines. He inquired about my tankless. So, the water comes out quite cold for quite a while before it gets warm, then eventually hot. Additionally, unlike a tank wh, the water in the lines won't be kept warm by the hot tank that they're connected to.

Takes longer to heat, and not as hot once heated. The unit itself is quite compact though, and that can be a big benefit.