What should I know before replacing a water heater?

Start with the house, not the appliance. Tank, tankless, and heat pump water heaters all make sense in different homes, but the right choice depends on how much hot water you use, what fuel you already have, how much space you can give the unit, and whether your electrical or venting setup can support it.

Heat pump water heaters are usually the most efficient electric option, but they are not plug-and-play in every basement or closet. DOE notes they need enough air volume and the right installation conditions, and federal procurement guidance says an ENERGY STAR heat pump water heater can still save money if its price is no more than about $2,500 above a less efficient model. That is not a universal homeowner rule, but it is a useful sanity check: if the upgrade cost is wildly higher, the payback needs a closer look.

If the old unit failed suddenly, the lowest-stress move is often a like-for-like replacement that fits the existing venting, gas line, or panel capacity. If you are planning ahead, compare the recovery rate, warranty, and operating cost before you sign. The cheapest box on the truck is not always the cheapest water heater over five years.

For the rest of the house-maintenance chain, see why does my sink smell like rotten eggs and how do I prevent pipes from freezing in winter.