Relief Sciences heat pumps: how do their ratings compare?

A typical Relief Sciences heat pump beats 66% of similar heat pumps (same size and type), which is well above average. Relief Sciences has 10 heat pump models in this list.

Covers older R-410A heat pumps, no longer installed new. See models sold today · Updated Oct 11, 2026

Overall score

66%

of similar heat pumps beaten by its typical model

Well above average

Relief Sciences has no QMID (the manufacturer ID the 25C tax credit needs) on file, so it is not ranked against other brands. Based on 16 models with every rating.

Relief Sciences, rating by ratingStrongest on summer-long cooling efficiency (beats 76%), weakest on efficiency on a 5°f day (beats 38%).

Efficiency on a 5°F dayCOP at 5°FBeats 38%
Heating power kept at 5°FCapacity at 5°F vs 47°FBeats 72%
Winter-long heating efficiencyHSPF2Beats 73%
Summer-long cooling efficiencySEER2Beats 76%
Hot-day cooling efficiencyEER2Beats 67%

Average (50%)

Each bar: the share of similar heat pumps a typical model beats on that rating.

Want Relief Sciences’s ranks and its models inside every size class? Switch to Advanced

Rebate standards

Share of this brand’s models that meet the efficiency levels rebate programs use. Programs can have other rules too.

100%
meet CEE 2025 Tier 1, the level many utility rebates use.
10 models. All brands: 48%.
See them
90%
meet Xcel Energy Colorado’s cold-climate rebate levels.
9 models. All brands: 38%.
See them
0%
reach the cold-climate tier: full heating output and a COP of 2.1 or more at 5°F.
None of its models yet. All brands: 1%.

Relief Sciences all-around best, by size

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?

4 of Relief Sciences’s 4 models of this size and type have all five ratings.

1LANG27OD25-3Relief Sciences2.5 tons · 28,000 Btu/h · DuctedNot 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)
Good
Efficiency at 5°F
2.00 (COP at 5°F)
Good
Winter efficiency
9.2 (HSPF2)
Good
Cooling efficiency
21.0 (SEER2)
Top 10%
Hot-day cooling
11.7 (EER2)
Good
75.5score / 100Heating 65 · Cooling 86
2LANG27OD35-3Relief Sciences2.5 tons · 28,000 Btu/h · DuctedCold-climate pick, score 65.0Meets CEE 2025, CEE 2026, Xcel CC
Heat kept at 5°F
90% (Capacity at 5°F vs 47°F)
Top 10%
Efficiency at 5°F
1.76 (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
73.8score / 100Heating 65 · Cooling 83
3LANG36OD35-4Relief Sciences3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 64.2Meets none of the standards tracked here
Heat kept at 5°F
89% (Capacity at 5°F vs 47°F)
Great
Efficiency at 5°F
1.70 (COP at 5°F)
Below the middle
Winter efficiency
10.0 (HSPF2)
Top 10%
Cooling efficiency
19.0 (SEER2)
Great
Hot-day cooling
11.7 (EER2)
Good
71.5score / 100Heating 64 · Cooling 79
4LANG36OD25-3Relief Sciences3 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
56.6score / 100Heating 44 · Cooling 69

These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.

What to do next

The advanced view has Relief Sciences’s ranks on each rating, its models inside every size and type, cold-weather curves and its newest certifications.

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