Gary KW4Z wrote:
My plans are to specify a (Gas) Tankless Hot Water Heater in our new home
for my wife and myself.

1) Demand- 2 shower heads, 8 body washers in one shower and trying to
fill a whirlpool ain't going to cut it.
2) Location- some one in the northern part of the country where service
water comes in @ 40 degrees 4-6 months out of the year is a lot
different from someone in the south where service water is seldom under
70 degrees.

Run the numbers and you'll be fine, don't believe what someone tells
you.

kenny b