I've narrowed down my heater choice to a Rheem heater. I have a 21' round AGP (~10k gallons) and deciding between the 206k BTU or the 266k BTU heater. There's currently only a $100 difference to get the 266kBTU one. Do you think the 266k BTU an overkill?
Also, is it more common these days to not install a bypass valve anymore? My gas line contractor will only install a check valve and not a bypass one.
thanks in advance for your replies.