Water Heater Replacement, With a Source and a Date on Every Number

Venting, fuel supply, electrical capacity and permits move a job from the low end to the high end, not the badge on the unit. A gas tankless install runs to the top of its range mainly because the priced job assumes a vent ducting upgrade and a gas connection upgraded to 200,000 BTU, per Homewyse, May 2026.

An electric tankless swap looks cheap on paper because the equipment is simple, but that estimate assumes three 40 amp 240 volt circuits already exist. Where they do not, running them is extra work the headline figure does not include. A heat pump unit adds its own list: air space, condensate routing and sometimes an electrical service upgrade, all named as cost drivers by ENERGY STAR, February 2024.

None of the published national ranges include permit and inspection fees, sales tax, or general contractor overhead, which Homewyse puts at an extra 13 to 22 percent where a general contractor supervises the job. Two quotes that differ by several hundred dollars are usually differing on scope, not on the appliance itself. The cost page walks through each driver with its own source, plus what repair, maintenance and conversion cost separately from a straight replacement.

When something is actively escaping or dangerous, not simply when the water runs cold. A smell of gas, water reaching outlets or the electrical panel, or a tank that has burst or is spraying are genuine emergencies. No hot water on a dry floor, with nothing to smell, is not.

That distinction is worth getting right before you do anything else, because a gas smell has one correct response and it is not troubleshooting: leave the building and call from outside. The emergency page covers what to shut off first, when to leave rather than investigate, and what a relief valve discharging, standing water, or a flood damaged heater actually means for safety, each point sourced to a federal agency or a manufacturer's own instructions.

Every price, date and standard on this site traces to a named publisher: a national cost calculator that stamps its own page with a month, a federal regulation, or a manufacturer's own warranty document. If a figure cannot be traced that way, it does not go on the page, and that rule applies to every page on this site, including this one.

The reason that matters here specifically is that the cost guides that usually rank for water heater searches publish wide price ranges with no source and no date attached to either end of them. A number with a publisher's name and a month on it is a different object from an unattributed one, because you can go check whether it still holds. Prices move, so treat the dates above as the point of the exercise: check them against the day you are reading this, not the day this page was written.