I am trying to choose between electric water heating and gas-fired heaters for showers.
These are for new houses, thus they should not be the mounted at shower stall type, should be mounted somewhere out of sight, and not require further attention. i.e. they must be designed to take full water supply pressure.
My father has avoided instant (unlimited) gas types because of past bad experiences where the gas heater was not able to give a steady supply temperature... it seemed as if the burner was cycling between full-on and full-off, producing water that was either too hot or too cold.
But I find it hard to believe that the present models being sold by CityGas are still incapable of producing water at steady lukewarm temperature, say 40 degrees C.
The largest Ferroli heaters sold by CityGas are 20L/min at delta-t of 25 degrees. 40 kW. And start from $742 for outdoor type without pump.
And I understand that the "built-in-pump" types (+ about $360) are designed to maintain a loop of hot water pipe at the set-point temperature to reduce waiting time and water wastage, at the start of your shower.
Also understood that the 40kW models are rated for about 4 simultaneous showers.
In order to decide, I need to hear from actual users...