Dear Readers,

My house has hard water. My hot water pressure if very low due to, I
assume, the scaling in the tankless coil hot water maker in my boiler
which is original to the houe (1959). I plan on upgrading to an
indirect water heater. Should I choose an indirect water heat that is
a tank-in-tank model, or a coil model? Does either type make a real
difference in avoiding hard water scaling within the tank and the
reduced efficiency it causes?

Any advice appreciated!
-Anthony Falcone