I had a greatly oversized Polaris propane water heater that just served one (residential) kitchen. I am looking to replace it. I would like to be energy efficient. Everything is in place for a direct vented, up to 100,000 BTU water heater with a short intake and exhaust run to outside. All this needs to service is a kitchen sink and dishwasher. All other hot water needs are at the far end of the house(over 40 feet away) and serviced by another hot water heater.

Is there any small propane solution available? There are plenty of electric options but these would be much less energy efficient that even a large propane unit.