Giant water heaters
12 water heaters listed under Giant.
| Model | UEF | Costs to run |
|---|---|---|
| GTHPCO-45 1**+GTXST-80TTP 1** | 3.80 | $240 a year |
| GTHPCO-45 1**+GTXST-80 1** | 3.80 | $240 a year |
| GTHPCO-45 1**+GTXST-66TTP 1** | 3.70 | $246 a year |
| GTHPCO-45 1**+GTXST-66 1** | 3.70 | $246 a year |
| GTHPCO-45 1**+GTXST-50LBTTP 1* | 3.55 | $168 a year |
| GTHPCO-45 1**+GTXST-50TTTP 1** | 3.52 | $169 a year |
| GTHPCO-45 1**+GTXST-50T 1** | 3.52 | $169 a year |
| GTHPCO-45 1**+GTXST-50STTP 1* | 3.52 | $169 a year |
| GTHPCO-45 1**+GTXST-50S 1* | 3.52 | $169 a year |
| GHPCO-45 1**+GXST-50TTTP 1** | 3.52 | $169 a year |
| GHPCO-45 1**+GXST-50T 1** | 3.52 | $169 a year |
| UTM-199X3-P 1*1 | 0.95 | Not published |
Computed from electricity at 18.34¢/kWh, the EIA average for US in June 2026. A kilowatt-hour is 3412 BTU. This is a rate times a rating, not a prediction of your bill.
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Source: ENERGY STAR certified product data, published by the U.S. EPA and used with attribution. This is a register of certified models, not of every model on the market. ENERGY STAR is a registered mark of the U.S. EPA; this site is not affiliated with or endorsed by EPA or DOE.