SLIMAIR vs TGM: heat pump ratings compared
Against heat pumps of the same size and type, a typical SLIMAIR model beats 60% and a typical TGM model 45%. SLIMAIR rates higher overall.
Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated
SLIMAIR
60%
of similar heat pumps beaten by its typical model
Well above average48 models listed
TGM
45%
of similar heat pumps beaten by its typical model
Below average77 models listed
- Efficiency on a 5°F dayCOP at 5°FSLIMAIR: Beats 60%TGM: Beats 48%
- Heating power kept at 5°FCapacity at 5°F vs 47°FSLIMAIR: Beats 59%TGM: Beats 42%
- Winter-long heating efficiencyHSPF2SLIMAIR: Beats 73%TGM: Beats 41%
- Summer-long cooling efficiencySEER2SLIMAIR: Beats 61%TGM: Beats 45%
- Hot-day cooling efficiencyEER2SLIMAIR: Beats 53%TGM: Beats 42%
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
- SLIMAIR
- 90%
- TGM
- 58%
Xcel CC
- SLIMAIR
- 77%
- TGM
- 55%
CEE Advanced
- SLIMAIR
- 2%
- TGM
- 1%
ENERGY STAR CC
- SLIMAIR
- 79%
- TGM
- 21%
All-around best, ductless 3.5–4.5 tons
Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.
Showing Ductless, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?
SLIMAIR
- 1SHC6Z55AH2AGSLIMAIR4.5 tons · 51,000 Btu/h · DuctlessCold-climate pick, score 69.9Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 87% (Capacity at 5°F vs 47°F)
- Good
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Below the middle
- Winter efficiency
- 10.6 (HSPF2)
- Good
- Cooling efficiency
- 21.4 (SEER2)
- Good
- Hot-day cooling
- 12.0 (EER2)
- Good
- 2SHC6Z48AH2AGSLIMAIR4 tons · 45,000 Btu/h · DuctlessCold-climate pick, score 68.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 98% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Below the middle
- Winter efficiency
- 10.2 (HSPF2)
- Good
- Cooling efficiency
- 21.2 (SEER2)
- Good
- Hot-day cooling
- 12.0 (EER2)
- Good
- 3SHC6Z48AC2AGSLIMAIR4 tons · 45,000 Btu/h · DuctlessCold-climate pick, score 60.1Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 78% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.10 (COP at 5°F)
- Great
- Winter efficiency
- 10.3 (HSPF2)
- Good
- Cooling efficiency
- 20.9 (SEER2)
- Below the middle
- Hot-day cooling
- 11.9 (EER2)
- Good
TGM
- 1GMRSHT42AS5TGM3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 66.5Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 90% (Capacity at 5°F vs 47°F)
- Great
- Efficiency at 5°F
- 2.10 (COP at 5°F)
- Great
- Winter efficiency
- 10.0 (HSPF2)
- Below the middle
- Cooling efficiency
- 21.0 (SEER2)
- Below the middle
- Hot-day cooling
- 13.0 (EER2)
- Top 10%
- 2TMRHT42AS5TGM3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 32.7Meets CEE 2025, CEE 2026, 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)
- Below the middle
- Winter efficiency
- 10.0 (HSPF2)
- Below the middle
- Cooling efficiency
- 24.0 (SEER2)
- Top 10%
- Hot-day cooling
- 11.2 (EER2)
- Below the middle
- 3MRS5VHT48ASwith ductless indoor unit MC45VHT48STGM4 tons · 48,000 Btu/h · DuctlessCold-climate pick, score 55.4Meets Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 81% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.11 (COP at 5°F)
- Top 10%
- Winter efficiency
- 9.9 (HSPF2)
- Below the middle
- Cooling efficiency
- 19.0 (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.
Open the advanced view