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GSW WATER HEATERS ENERGY STAR certified heat pump water heaters: 13 models
GSW WATER HEATERS has 13 ENERGY STAR certified products in heat pump water heaters on the EPA's list as read on November 4, 2026, which puts it number 13 of 50 brands by model count. Its newest certification is GTHPCO-45 1**+GTXST-50T 1**, dated March 24, 2026.
SpecStream is the live web data engine for teams and agents. It reads the EPA's ENERGY STAR certified product lists, keyed on the ENERGY STAR Unique ID, and this page is that reading. Ask for the products you track by category, brand or rating, and each new certification arrives in your sheet, CRM, Slack or agent as the EPA publishes it.
- 13Certified products
- March 24, 2026Newest certification
- 50Brands in this category
GSW WATER HEATERS certified heat pump water heaters
Newest first. Each row links to the product's record in the EPA's open data portal.
| Model | Uniform Energy Factor (UEF) | Storage Volume (gallons) | Electric Usage (kWh/yr) | ENERGY STAR ID | Certified | Source |
|---|---|---|---|---|---|---|
| GTHPCO-45 1**+GTXST-50T 1** | 3.52 | 45 | 923 | 4529419 | March 24, 2026 | data.energystar.gov |
| GTHPCO-45 1**+GTXST-50TTTP 1** | 3.52 | 45 | 923 | 4529415 | March 24, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-50S 1** | 3.52 | 46 | 923 | 4529476 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-50STTP 1** | 3.52 | 46 | 923 | 4529475 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-50LBTTP 1** | 3.55 | 48 | 915 | 4529430 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-50T 1** | 3.52 | 46 | 923 | 4529427 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-50TTTP 1** | 3.52 | 46 | 923 | 4529423 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-66 1** | 3.7 | 60 | 1,341 | 4529411 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-66TTP 1** | 3.7 | 60 | 1,341 | 4529407 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-80 1** | 3.8 | 73 | 1,306 | 4529403 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-80TTP 1** | 3.8 | 73 | 1,306 | 4529399 | March 19, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-50S 1* | 3.52 | 46 | 923 | 4529611 | March 4, 2026 | data.energystar.gov |
| GHPCO-45 1**+GXST-50STTP 1* | 3.52 | 46 | 923 | 4529610 | March 4, 2026 | data.energystar.gov |
More
- All ENERGY STAR certified heat pump water heaters
- All ENERGY STAR certified products from GSW WATER HEATERS
Updated November 4, 2026. Read from ENERGY STAR certified product data, US Environmental Protection Agency (data.energystar.gov). Public domain data from the US EPA and the US Department of Energy. Products are listed as the EPA publishes them on the date this page was read, and the EPA can revise or withdraw a certification. A product is counted once, under the most specific list that holds it. For heat pumps each ENERGY STAR ID is one outdoor and indoor unit combination, so a model number can repeat. Brand names are as published. This page uses EPA data and is not endorsed or certified by the EPA or ENERGY STAR. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.