Comment Re: Grundfos? (Score 1) 56
What you describe makes perfect sense in a commercial setting. Our house really is that large, but we still don't need hot water 24/7 at all fixtures, and there are only 2 of us. Our showers and baths in the master bathroom are served by the larger 80 gallon water heater which does not have a recirculation pump. The delay is about 1 minute and tolerable.
The smaller 50 gallon water heater serves the other 3.5 bathrooms, but the showers are only used when we have guests. The rest of the time, the hot water from that water heater is used only by the dishwasher and clothes washer. We cook with filtered water, and thus boil it separately on induction. Therefore, the water heater is on the lowest setting, and the circulation pump is off 99.9% of the time. My previous Miele dishwasher actually specified colder water inlet. The newer Bosch says to connect to hot water, so that's what was done. The LG clothes washer requires both hot and cold inlets, and I don't know what would happen if both were cold. If they could really function on cold only, I could just turn off that water heater altogether.