We are building a 4 stall horse barn with a guest room upstairs with a full bath. What would be the best water heating method? Would a point of use heater work for both the sink and the shower? Tankless system? Or just a plain old water heater? No kitchen so I assume we need something rather small. The barn is located in South Central Georgia so the winters are fairly mild and the summers are Africa hot. We have well water, not sure if this makes any difference.
Whatever we choose the unit will be in the bathroom. Hope someone can give me some good advice. Thanks!
Your sizing references are backwards. A bathroom needs more hot water than a kitchen. A shower, with water saving head, uses 2-1/2 gallons per minute. Having well water, I would advise against a tankless unit. They have small tubing in them that can get clogged easily with mineral deposits. You can enclose the unit for safety reasons, and since it is not always going to be in use (guest room), I would go electric so you don't need a vent out the roof.
If you have never made a mistake, you haven't done much.