Why one price is the wrong answer
If a page says a water heater “costs $1,800,” it is guessing which house you have. Kayefi shows three numbers instead. Low is the easy version: same fuel, clear access, nothing extra. Typical is that job in the example home on the city page. High is the same machine when the quote picks up a pan, a flue, a permit delay, or a second trip. High is not a different project.
What actually changes the price
Labor is the local part. A city at 1.30 times a national crew is charging you for time and permitting, not for a fancier water heater. Materials barely move. If a bid sits inside the range, still read the scope line by line. If it sits far above the high number, either the scope changed or you are looking at a different job. Ask which one it is, in writing.
The bill after the install
Degree days and the electric rate do not change the sticker by themselves. They change whether the efficient machine is the one you meant to buy. A heat-pump water heater in a cold garage on cheap power can be a worse deal than the same unit in a high-rate city with a cool basement. Keep the install price and the monthly bill in separate sentences.
Your home, not the example home
Every city page uses one example house so the numbers have a place to stand. If that is not your place, set your city, your square feet, and whether you rent at the top of the site. The calculator follows you. Nothing here is a bid, a listing, or your utility tariff. The review date is the last day we stood behind the row. After that, treat it as old.