FRANKLIN vs ZERO: heat pump ratings compared
Against heat pumps of the same size and type, a typical FRANKLIN model beats 54% and a typical ZERO model 49%. FRANKLIN rates higher overall.
Covers older R-410A heat pumps, no longer installed new. See models sold today · Updated
FRANKLIN
54%
of similar heat pumps beaten by its typical model
About average74 models listed
ZERO
49%
of similar heat pumps beaten by its typical model
About average69 models listed
- Efficiency on a 5°F dayCOP at 5°FFRANKLIN: Beats 44%ZERO: Beats 48%
- Heating power kept at 5°FCapacity at 5°F vs 47°FFRANKLIN: Beats 45%ZERO: Beats 43%
- Winter-long heating efficiencyHSPF2FRANKLIN: Beats 44%ZERO: Beats 46%
- Summer-long cooling efficiencySEER2FRANKLIN: Beats 50%ZERO: Beats 53%
- Hot-day cooling efficiencyEER2FRANKLIN: Beats 64%ZERO: Beats 46%
Average (50%)Dashed outline: the other brand, for comparison
Want ranks, distributions per size class and cold-weather curves? Switch to Advanced
Rebate standards
CEE 2025
- FRANKLIN
- 32%
- ZERO
- 59%
Xcel CC
- FRANKLIN
- 22%
- ZERO
- 48%
CEE Advanced
- FRANKLIN
- 0%
- ZERO
- 0%
ENERGY STAR CC
- FRANKLIN
- 19%
- ZERO
- 25%
All-around best, ducted 2.5–3 tons
Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.
Showing Ducted, 2.5–3 tons (27,000–38,999 Btu/h cooling), the most-listed ducted size. Pick yours above. What size is my system?
FRANKLIN
- 1MST363F25MHAAFRANKLIN3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 79.9Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 100% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 1.90 (COP at 5°F)
- Good
- Winter efficiency
- 10.0 (HSPF2)
- Top 10%
- Cooling efficiency
- 19.4 (SEER2)
- Great
- Hot-day cooling
- 12.0 (EER2)
- Great
- 2MST273F25MHAAFRANKLIN2.5 tons · 27,000 Btu/h · DuctedCold-climate pick, score 80.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 101% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 1.90 (COP at 5°F)
- Good
- Winter efficiency
- 10.0 (HSPF2)
- Top 10%
- Cooling efficiency
- 19.0 (SEER2)
- Great
- Hot-day cooling
- 11.8 (EER2)
- Great
- 3MST283F25MHAAFRANKLIN2.5 tons · 28,000 Btu/h · DuctedCold-climate pick, score 66.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 89% (Capacity at 5°F vs 47°F)
- Great
- Efficiency at 5°F
- 1.80 (COP at 5°F)
- Below the middle
- Winter efficiency
- 9.5 (HSPF2)
- Great
- Cooling efficiency
- 20.0 (SEER2)
- Top 10%
- Hot-day cooling
- 11.7 (EER2)
- Good
ZERO
- 1Z3SOV-27HDM-USZERO2.5 tons · 28,000 Btu/h · DuctedCold-climate pick, score 57.4Meets CEE 2025, CEE 2026, Xcel CC
- Heat kept at 5°F
- 71% (Capacity at 5°F vs 47°F)
- Good
- Efficiency at 5°F
- 1.83 (COP at 5°F)
- Below the middle
- Winter efficiency
- 9.2 (HSPF2)
- Good
- Cooling efficiency
- 21.0 (SEER2)
- Top 10%
- Hot-day cooling
- 11.7 (EER2)
- Good
- 2Z4SOV-36HDM-USZERO3 tons · 36,000 Btu/h · DuctedNot a cold-climate pick: keeps 64% of its heat at 5°FMeets none of the standards tracked here
- Heat kept at 5°F
- 65% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 1.68 (COP at 5°F)
- Below the middle
- Winter efficiency
- 9.2 (HSPF2)
- Good
- Cooling efficiency
- 20.0 (SEER2)
- Top 10%
- Hot-day cooling
- 11.0 (EER2)
- Below the middle
- 3ZSOV-36HDM-USwith ducted air handler ZAV-36HDM-USZERO3 tons · 36,000 Btu/h · DuctedNot a cold-climate pick: keeps 63% of its heat at 5°FMeets none of the standards tracked here
- Heat kept at 5°F
- 63% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.06 (COP at 5°F)
- Great
- Winter efficiency
- 9.0 (HSPF2)
- Good
- Cooling efficiency
- 15.4 (SEER2)
- Below the middle
- Hot-day cooling
- 8.2 (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.
Open the advanced view