I looked up what that is,
It moves hot water from your water heater through your pipes and back again, keeping the water in the pipes hot and ready for use
While that sounds great from an end point perspective - my water would be hot straight from the tap - this would necessitate keeping the water in the pipes hot 24/7 so that it’d be ready at a moments notice at any time.
That would be SOOO much more expensive! Just imagine! So much energy/money lost keeping some pipes hot for the few times a day you need to use the hot tap.
Sounds like a great system for places like a hospital where on demand, correctly heated water throughout the building complex is a must, but those places have £££ to burn.
I do agree this is a problem though, I’ve sometimes wondered if there’s an instant electric heating system one can install under the sink (I know these exist), but rather than only heating water that way (which would use electricity and be WAY more expensive than the gas boiler), if it heated the water only when needed - and when it detects the incoming water is hot (as the boiler’s caught up) it can stop heating the water itself, you know?
A little initial heat burst for the first 15 seconds basically until the boiler catches up, that’d be great and not too big of an additional cost to run :-D
I say mould because I’m English and that’s just how it’s spelled here (we also pronounce it with a U, pronouncing it without the U as mold would be…strange).
Not an overly exciting response I know, but there you go :P