I need to keep the oil burner up to par, since it's my main back-up.
My Plan 'C' backup is wood, but I don't normally have a lot on hand.
I'm hoping some Solar PV assist on the boiler will provide most of our
summer hot water needs. I'm about ready to order some panels.
If Sanyo doesn't want the old unit back, I think it might be valuable as a source of spare parts.