Zephyr ZE-18CB22O
At South Dakota energy prices this heat pump costs $15.67 per million BTU of heat. The register lists it in 2 configurations, and the ratings below are the range across all of them.
Computed from electricity at 15.36¢/kWh, the EIA average for SD in June 2026. A kilowatt-hour is 3412 BTU. This is a rate times a rating, not a prediction of your bill.
Against the alternatives, at South Dakota prices
Dollars per million BTU delivered into the house. Lower is cheaper to run; it says nothing about what the equipment costs to buy or install.
What the register says
| Rating | 21.00 (20.00–21.00 across 2 configurations) SEER2 |
|---|---|
| SEER2 (cooling efficiency) | 21.0 |
| HSPF2 (heating efficiency) | 9.8 |
| COP at 5 °F | 2.50 |
| Nominal cooling capacity | 18,000 BTU/h |
| Capacity kept at 5 °F | 76% of its 47 °F rating |
| ENERGY STAR cold-climate | No |
| Fuel | Electricity |
| Type | HP - Mini or Multi Split |
| Refrigerant | R-32 (GWP:675 | Lower GWP) |
| AHRI reference | 215414825 |
| Published configurations | 2 |
| Certified | 2026-03-26 |
Priced in your state
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Other Zephyr heat pumps
The nearest by SEER2 rating.
- ZE-18CB25O 21.00 SEER2
- ZE-18M222SCO 21.00 SEER2
- ZE-36M422SCO 21.00 SEER2
- ZE-09DB22O 20.00 SEER2
- ZE-12DB25O 22.00 SEER2
- ZE-24M322SCO 22.00 SEER2
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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. This page is a record of a published certification; it is not an endorsement, not a quote, and not advice. Corrections.