What the Giant GTHPCO-45 1**+GTXST-66 1** costs to run
The Giant GTHPCO-45 1**+GTXST-66 1** is certified by ENERGY STAR at 1,341 kWh a year, more expensive than most models in its category to run among electric water heaters currently certified.
That $252 is priced at 18.8¢/kWh, the average of all 51 state rates this site tracks. Your own state's rate is one click away.
How the Giant GTHPCO-45 1**+GTXST-66 1** compares to other electric water heaters
The category average is 1,105 kWh/yr; this model runs 21.4% above it, ranking 499 of 596 electric water heaters tracked here for running cost. 596 certified electric water heaters, one average, about $44/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Giant GTHPCO-45 1**+GTXST-66 1** on that list: American MHPCO-45 1**+MXST-66TTP 1** ($252/yr, 1,341 kWh/yr) runs slightly less, while Giant GTHPCO-45 1**+GTXST-66TTP 1** ($252/yr, 1,341 kWh/yr) runs slightly more.
Comparing Giant's own models
Ranked 12 of Giant's 13 certified electric water heaters, this sits between the GTHPCO-45 1**+GTXST-50LBTTP 1* ($172/yr, the brand's cheapest) and the GTHPCO-45 1**+GTXST-66TTP 1** ($252/yr, its priciest).
What this adds up to over time
Over the 11-year service life NAHB reports for this category, running the Giant GTHPCO-45 1**+GTXST-66 1** costs roughly $2,773 in electricity, separate from the purchase price.
Shopping for a new one
Running above the category average, $252/year is exactly the kind of number that makes a newer, more efficient model pay for itself faster.
Compare current ENERGY STAR certified electric water heaters before buying.
If you're keeping it
$252/year to run is the predictable cost of the Giant GTHPCO-45 1**+GTXST-66 1**; a protection plan covers the unpredictable one, a repair bill.
How this was checked
Nothing here is estimated from a nameplate wattage; the 1,341 kWh/yr is ENERGY STAR's own certified figure for this model. At rank 499 of 596 for running cost, see the electric water heater category page for the rest of the field, or the guide to how much your state matters.