Hello,
We're currently on a highly efficient Buderus 30 gallon (86.6%) tank. My best guess for its operating cost is $261 per year or so based on my calculations.
Based on the same calculations, increasing to an 80 gallon tank (which would cover my main interest in tankless - the showers) would only increase the price to $275.
At the same time, an 116 AMP electric (cheaper install) at 5 GPM with 70 degree rise (to run the tub) appears to cost $50 extra a year to run (if I have it cover four showers a day). That doesn't include installation, and the propane units didn't seem any better but had higher installation costs.
That appears to be more expensive - both to install and run - than just increasing the tank. My question is - do those numbers sound right? Am I missing something?
Thanks guys!
We're currently on a highly efficient Buderus 30 gallon (86.6%) tank. My best guess for its operating cost is $261 per year or so based on my calculations.
Based on the same calculations, increasing to an 80 gallon tank (which would cover my main interest in tankless - the showers) would only increase the price to $275.
At the same time, an 116 AMP electric (cheaper install) at 5 GPM with 70 degree rise (to run the tub) appears to cost $50 extra a year to run (if I have it cover four showers a day). That doesn't include installation, and the propane units didn't seem any better but had higher installation costs.
That appears to be more expensive - both to install and run - than just increasing the tank. My question is - do those numbers sound right? Am I missing something?
Thanks guys!