Quote:
Originally Posted by Quoth
The actual boiler (fireplace, stove, oil, gas etc) doesn't use fresh water. Some are pressurised. It uses a coil in the "hot tank" to heat the tap water without mixing.
|
The gas water heater in my home definitely uses tap water. Cold water enters from the top and is directed to the bottom of the tank where it is heated with the hot water rising to the top exit. Drain the sediment every few months and replace the anode as needed.
We looked at a tankless water heater when we last replaced our hot water heater but our basement needs some renovation before we have the space to install one so went with the old fashioned storage tank.