"Eccotemp Tankless Water Heater", indoor propane model FVI12
For cabin, cottage, maybe RV. 75,000 BTU. Still in the box. Needs 110 AC power, though only pulls 2 watts idle and 10 watts during operation. Cost me $400 after shipping & taxes. Because of some mixup, I was sent this model and the outdoor model, which was what I wanted, and it works great. Will sell for $300.