SewerRatz
Illinois Licensed Plumber
I can't remember if it was on this thread or another related thread but the observation was made that plumbing codes didn't address tankless sizing. Another poster observed that 8 gpm (Bradford White calculator) was unrealistic if I wanted to supply a shower, a dishwasher or kitchen sink, and a clothes washer simultaneously (peak demand).
I then remembered that we had done some work in Florida a few years back. I humbly submit to you a Residential Tankless Water Heater worksheet, 2001 Florida plumbing code. Adjust as necessary for your minimum incoming water temp and required temperature rise; the physics and math will work across state lines. I think the worksheet would make a great sticky.
I'm done, here.
Nice, thank you for posting that. I will check to see if Illinois has something like that. The last continued education class I was at they never did bring this up. I may take another continued education class early to pick the brains of the plumbing code writers.