Charlie D. wrote:
I wonder how one can justify the cost of one of those things. There does not appear to me that there is a payback. I, like many, use electric when available. Running the heater for an additional 10 minutes or so would reheat the water enough for a second person.
There's not any meaningful payback in any meaningful time for a tankless, in the home or RV. Unless you take hour long showers your propane use will be minimal in both.
A tankless for the home costs at LEAST $1k. A tanked unit $3-500. I can buy a LOT of natural gas for $5-700! As it is now our tank style natural gas unit fires maybe 2x a day for a few minutes when we are not using it. Our gas bills in the summer (only the HWH, clothes dryer and stove) are under $30, most of that the distribution charges.
So if you need the space or lots of hot water, a tankless makes sense. Otherwise they don't "save" as much as you think.