Lifespeed
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I have a slightly unusual water heater requirement, for a "Granny Unit", if you will. It will be a new installation, preferably under-sink as space is limited, with 240V service available at the panel. I am checking on the ampacity now, but with the installation of a ductless mini-split heat pump, it may be that not more than 20A to 30A are available. I will, of course, confirm before proceeding further.
I mention this because a 20A tankless has very limited capacity - 45F temperature rise at 0.5GPM. So probably this is an application for a small 240V tank, not the typical 2-gallon under-sink 120V "hand washing" tank fed from a real hot water heater. This application will be standalone, fed from the cold water supply.
I mention this because a 20A tankless has very limited capacity - 45F temperature rise at 0.5GPM. So probably this is an application for a small 240V tank, not the typical 2-gallon under-sink 120V "hand washing" tank fed from a real hot water heater. This application will be standalone, fed from the cold water supply.