Can an on-demand hot water heater solve my problem?
Our master bathroom is at the end of the house, far from the hot water heater. It takes over a minute, about 80 seconds (more in winter,) to get water warm enough for hand-washing when one tap is open. (If I turn on all the taps and showers, it comes faster.)
Re-plumbing is absolutely NOT an option, for various reasons. So, we can't install a return loop. Also, this is the only part of the house where this is a problem. The other bath, and kitchen, are fine since they are near the boiler.
I'm wondering if there is a way to install a small, inexpensive on-demand electric heater in-line on the hot water feed, which could heat the first minute or so of water until the regular domestic hot water arrives.
That sounds like it would work in theory, no? Can you think of a reason why it won't work?
I'm thinking something like this:
Here is a link that might be useful: inexpensive on-demand heater