I've read that water heater depreciation is not considered an appliance,
That has been a grey area for as long as I can remember. The current take is that, since a water heater becomes a physical part of the plumbing system, and there's no question that the plumbing system is a physical part of the structure, a water heater gets classified as residential rental real estate and depreciated over 27.5 years.
my invoice groups together heater + install = 3039
Just curious, because the last time I had a water heater installed, it was a 70 gallon electric. Including installation, cost was a total of around $800. So just what is it that costs so darn much about your water heater? Gold plated? The price you are stating even though in includes installation, seems beyond price gouging. I'd call it statutory financial rape.
