Call Us: 1-844-726-3262 • 1-844-SANDCO2

For Homeowners


The Sanden SANCO2 Heat Pump Water Heater is a highly energy efficient alternative to traditional electric or gas water heaters. It absorbs heat from the outside air to heat water – saving energy, saving money and reducing greenhouse gas emissions.


Flexible 2-Piece Installation


Unlike a conventional heat pump water heater, the SANCO2 can operate in colder climates (to -15°F) and features a 2‑piece split system. The hot water storage tank is installed indoors, the heat pump unit outdoors (up to 50 feet away).

This flexible design offers several advantages including maintaining comfortable indoor air temperatures. The outdoor heat pump unit operation is rated 'whisper quiet,' it won't disturb you or your neighbors!

The hot water storage tank is constructed of long-lasting glass-lined stainless steel to provide years of reliable use.


Ultra High Efficiency Reduces Energy Bills


The highly effecient SANCO2 uses much less energy than an electric water heater while delivering abundant hot water for bathing, dishwashing and laundry. Available in 43- and 83-gallon tank options, choose the size that fits your family's hot water needs. And you'll be helping protect the environment. Our naturally-occuring CO2 refrigerant has minimal impact on global warming.

Mother bathing child

Learn more about the SANCO2 Heat Pump Water Heater

Performance, comfort and convenience…and better for the environment


Quick References

Where to Buy »

Search by zip code to find dealers and installation experts in your area where you can purchase Sanden's innovative energy-saving products.

Product Brochure Adobe PDF icon  »

Read more about the money- and energy-saving features and benefits of the SANCO2 Heat Pump Water Heater. Includes product specifications.

Energy Guide Label, 43-Gal. Tank  Adobe PDF icon  »
Model No. GS3-45HPA-US & SAN-43SSAQA

Energy Guide Label, 83-Gal. Tank  Adobe PDF icon  »
Model No. GS3-45HPA-US & SAN-83SSAQA

Energy Guide Label, 119-Gal. Tank  Adobe PDF icon  »
Model No. GS3-45HPA-US & SAN-119GLBK

See the estimated yearly operating cost for the SANCO2 compared with other similar models, along with estimated yearly energy use.

Owner's Manual Adobe PDF icon  »

The place to find information on safety precautions, installation requirements, care and maintenance guidelines, troubleshooting tips and warranty information.


Installation Manual Adobe PDF icon  »

Learn about installation options, water piping and electrical hookups, system set up and more. Technical specifications and error codes included.