Ozone Spirit vs PRIME: heat pump ratings compared
Against heat pumps of the same size and type, a typical Ozone Spirit model beats 47% and a typical PRIME model 20%. Ozone Spirit rates higher overall.
Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated
Ozone Spirit
47%
of similar heat pumps beaten by its typical model
About average19 models listed
PRIME
20%
of similar heat pumps beaten by its typical model
Well below average18 models listed
- Efficiency on a 5°F dayCOP at 5°FOzone Spirit: Beats 72%PRIME: Beats 44%
- Heating power kept at 5°FCapacity at 5°F vs 47°FOzone Spirit: Beats 15%PRIME: Beats 15%
- Winter-long heating efficiencyHSPF2Ozone Spirit: Beats 14%PRIME: Beats 21%
- Summer-long cooling efficiencySEER2Ozone Spirit: Beats 23%PRIME: Beats 18%
- Hot-day cooling efficiencyEER2Ozone Spirit: Beats 17%PRIME: Beats 32%
Average (50%)Dashed outline: the other brand, for comparison
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Rebate standards
CEE 2025
- Ozone Spirit
- 16%
- PRIME
- 11%
Xcel CC
- Ozone Spirit
- 0%
- PRIME
- 11%
CEE Advanced
- Ozone Spirit
- 0%
- PRIME
- 0%
ENERGY STAR CC
- Ozone Spirit
- 0%
- PRIME
- 0%
All-around best, ductless up to 1.5 tons
Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.
Showing Ductless, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?
Ozone Spirit
- 1COPXIH122Awith ductless indoor unit EOPXIH122AOzone Spirit (sold as Ozone Spirit)1 ton · 12,000 Btu/h · DuctlessNot a cold-climate pick: keeps 66% of its heat at 5°FMeets CEE 2025, CEE 2026
- Heat kept at 5°F
- 67% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.15 (COP at 5°F)
- Great
- Winter efficiency
- 10.0 (HSPF2)
- Good
- Cooling efficiency
- 21.0 (SEER2)
- Below the middle
- Hot-day cooling
- 12.0 (EER2)
- Below the middle
- 2COPXIH182Awith ductless indoor unit EOPXIH182AOzone Spirit (sold as Ozone Spirit)1.5 tons · 17,000 Btu/h · DuctlessNot a cold-climate pick: keeps 65% of its heat at 5°FMeets CEE 2025, CEE 2026
- Heat kept at 5°F
- 66% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.17 (COP at 5°F)
- Great
- Winter efficiency
- 9.0 (HSPF2)
- Below the middle
- Cooling efficiency
- 21.0 (SEER2)
- Below the middle
- Hot-day cooling
- 12.0 (EER2)
- Below the middle
PRIME
- 1CMPRN121-W1with ductless indoor unit EMPRN121-W1PRIME1 ton · 12,000 Btu/h · DuctlessNot a cold-climate pick: keeps 66% of its heat at 5°FMeets CEE 2025, CEE 2026
- Heat kept at 5°F
- 67% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.05 (COP at 5°F)
- Good
- Winter efficiency
- 9.0 (HSPF2)
- Below the middle
- Cooling efficiency
- 22.0 (SEER2)
- Good
- Hot-day cooling
- 10.0 (EER2)
- Below the middle
- 2CMPRN182-W1with ductless indoor unit EMPRN182-W1PRIME1.5 tons · 18,000 Btu/h · DuctlessCold-climate pick, score 42.2Meets CEE 2025, CEE 2026, Xcel CC
- Heat kept at 5°F
- 70% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.09 (COP at 5°F)
- Good
- Winter efficiency
- 9.0 (HSPF2)
- Below the middle
- Cooling efficiency
- 19.0 (SEER2)
- Below the middle
- Hot-day cooling
- 11.0 (EER2)
- Below the middle
- 3CMPRN122-W1with ductless indoor unit EMPRN122-W1PRIME1 ton · 12,000 Btu/h · DuctlessCold-climate pick, score 37.8Meets Xcel CC
- Heat kept at 5°F
- 74% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Good
- Winter efficiency
- 8.3 (HSPF2)
- Below the middle
- Cooling efficiency
- 18.5 (SEER2)
- Below the middle
- Hot-day cooling
- 9.5 (EER2)
- Below the middle
These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.
Next steps
The advanced view adds ranks, both brands’ models inside every size class, standout models per rating and cold-weather curves.
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