John P.. Bengi wrote:

The Rinnai units are up to 199,000 BTU and can give 5
GPM at 70F rise.

How hot do you need your two simultaneous showers? I
doubt you shower at over 110F.


Jim Baber wrote:
I went through this analysis, and had a large cost of installation
on the Rinnai units. I would have had to replace over 300 feet of 1/2
inch gas pipe with 3/4 inch line, and paid the gas utility to replace my
meter. Also, my electric water heaters didn't have any roof venting,
but it would be required with the gas heaters. All together this all
would cost about $3,000 plus the heaters. I still have electric water
heaters (2), but they are now on a time of day clocks, restricting their
operation to off-peak power hours.

If I were building a new home I would use the Rinnai gas heaters as a
backup to solar domestic water heating.

"SQLit" wrote in message
...


"Bob Pietrangelo" wrote in


message


news

wrote in message



roups.com...


On-demand water heaters do not produce enough water


for multiple showers,


especially in the winter. They also are more prone


to mineral build-up in


the coils. I do not recommend them for anything


more than a small


apartment.



The total degree temp increase with colder input


water was the turn off for


me. Reading the specs of the various manufactures


was confusing at first


then it all made sense. That and in a city of over a


million people there


were no spare parts available.