"Harry Everhart" wrote in message
1. I must wait 90 seconds before I have hot water in the bathrooms -
they are served by a water heater 90 feet away through a 3/4 copper
buried in the slab.
2. I am keeping 100 gallons of water heated for two people - in one day
- we each shower at about 10 AM - then do one load of laundry at 11 AM -
then do a load of dishes at 6 PM. That's it.


Perfect candidate for the instnad point of use heater. Keeping that 100
gallons hot is costly and wasteful.