Originally Posted by mredge73
Natural Gas on demand water heaters have much better reviews than that of electric ones and are very efficient. Should help a lot in conjunction with a bulk water heater or hlt.
You could also tee off of them for cleaning water.
If you can live with a reduced flow rate you could probably run two in series and eliminate the HLT all together. Just a thought...
We debated this today. I was concerned with 2 things.
a) Overriding the control unit in an electric instant water heater we had available to look at seem like it would be more difficult than the regular water heater. They usually max at like 130*F
b) Would we be able to get a constant temperature within 1 or 2*F, I fear there may be fluctuation
But the idea is very interesting. This was a discussion today with my Shop man.
Note: I have not had a NG instant HWH to look inside the guts or see one run. But as you said mredge73 they seem to get better reviews.