Data through April 2026
Water Heaters (Electric) · 421 certified models
Water Heaters (Electric) Under 24" Wide
Filtering to water heaters (electric) under 24" wide narrows the field to 421 of the 566 certified water heaters (electric) in this data, ranging $121–$292 a year at national-average electricity rates (median $174).
The 50 most efficient (of 421)
Other size facets
Questions, answered with the data
- How much does it cost to run water heaters (electric) under 24" wide?
- Among 421 certified models in this data, water heaters (electric) under 24" wide cost $121 to $292 a year to run at the U.S. average electricity rate (18.8¢/kWh) — a median of $174.
- Do water heaters (electric) under 24" wide cost more or less than the average electric water heater?
- The median model here runs $174 a year, 15% less than the $204 median across all certified water heaters (electric).
- What's the cheapest model among water heaters (electric) under 24" wide?
- The Friedrich PROH40 T2 FD400-15 costs about $121 a year at the U.S. average rate (643 kWh/yr) — the lowest certified figure in this group.
- What does the certified annual-kWh figure assume for water heaters (electric)?
- The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.