Bring a jacket. And shorts. You never know what you're going to get in the mountains in springtime.

Some tankless water heaters have language in the warranty fine print that voids or shortens the warranty if they're used in recirculating systems. They're not designed for that kind of constant duty.

You should consider point of use heaters (as other users have suggested).

I noticed recently that I had a very symmetrical bell curve distribution of Wordle outcomes and thought y'all would find it mildly interesting. Obviously, my 6 failures (not shown but implied by the 280 total attempts) don't fit the bell curve distribution.

It always bothered me that they didn't call it "Sombrero" instead of Mexican Hat.