Data through June 2026
Water Heaters (Electric) · 9 certified models
GSW WATER HEATERS
This data covers 9 certified GSW WATER HEATERS — annual running costs span $168 to $246 at national-average rates (median $169; the whole-category median is $222).
All certified models
| # | Model | kWh/yr | $/yr (US avg) |
|---|---|---|---|
| 1 | GSW WATER HEATERS GHPCO-45 1**+GXST-50LBTTP 1 | 915 | $168 |
| 2 | GSW WATER HEATERS GHPCO-45 1**+GXST-50S 1 | 923 | $169 |
| 3 | GSW WATER HEATERS GHPCO-45 1**+GXST-50STTP 1 | 923 | $169 |
| 4 | GSW WATER HEATERS GHPCO-45 1**+GXST-50T 1 | 923 | $169 |
| 5 | GSW WATER HEATERS GHPCO-45 1**+GXST-50TTTP 1 | 923 | $169 |
| 6 | GSW WATER HEATERS GHPCO-45 1**+GXST-80 1 | 1,306 | $240 |
| 7 | GSW WATER HEATERS GHPCO-45 1**+GXST-80TTP 1 | 1,306 | $240 |
| 8 | GSW WATER HEATERS GHPCO-45 1**+GXST-66 1 | 1,341 | $246 |
| 9 | GSW WATER HEATERS GHPCO-45 1**+GXST-66TTP 1 | 1,341 | $246 |
Other brand facets
Questions, answered with the data
- How much does it cost to run GSW WATER HEATERS water heaters (electric)?
- Among 9 certified models in this data, GSW WATER HEATERS water heaters (electric) cost $168 to $246 a year to run at the U.S. average electricity rate (18.3¢/kWh) — a median of $169.
- Do GSW WATER HEATERS water heaters (electric) cost more or less than the average electric water heater?
- The median model here runs $169 a year, 24% less than the $222 median across all certified water heaters (electric).
- What's the cheapest model among GSW WATER HEATERS water heaters (electric)?
- The GSW WATER HEATERS GHPCO-45 1**+GXST-50LBTTP 1 costs about $168 a year at the U.S. average rate (915 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.