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Legacy Systems heat pumps: how do their ratings compare?

A typical Legacy Systems heat pump beats 44% of similar heat pumps (same size and type), which is below average. Legacy Systems has 11 heat pump models in this list.

Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated

Overall score

44%

of similar heat pumps beaten by its typical model

Below average

Legacy Systems has no QMID (the manufacturer ID the 25C tax credit needs) on file, so it is not ranked against other brands. Based on 11 models with every rating.

Legacy Systems, rating by ratingStrongest on hot-day cooling efficiency (beats 87%), weakest on heating power kept at 5°f (beats 17%).
  • Efficiency on a 5°F dayCOP at 5°FBeats 40%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBeats 17%
  • Winter-long heating efficiencyHSPF2Beats 32%
  • Summer-long cooling efficiencySEER2Beats 31%
  • Hot-day cooling efficiencyEER2Beats 87%

Average (50%)

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

Want Legacy Systems’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.

  • 0%

    meet CEE 2025 Tier 1, the level many utility rebates use.

    0 models. All brands: 57%.

    See them

  • 0%

    meet Xcel Energy Colorado’s cold-climate rebate levels.

    0 models. All brands: 53%.

    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: 3%.

Legacy Systems 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, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

3 of Legacy Systems’s 3 models of this size and type have all five ratings.

  1. 1GLZS4BA6010A*with ducted air handler AMST60DU1300ALegacy Systems4.5 tons · 56,500 Btu/h · DuctedNot a cold-climate pick: keeps 48% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    48% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    8.2 (HSPF2)
    Good
    Cooling efficiency
    14.5 (SEER2)
    Below the middle
    Hot-day cooling
    12.5 (EER2)
    Top 10%
    53.3score / 100Heating 43 · Cooling 64
  2. 2GLZS4BA4810A*with ducted air handler AMST48CU1300ALegacy Systems4 tons · 45,500 Btu/h · DuctedNot a cold-climate pick: keeps 43% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    43% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    7.8 (HSPF2)
    Below the middle
    Cooling efficiency
    15.2 (SEER2)
    Below the middle
    Hot-day cooling
    12.5 (EER2)
    Top 10%
    52.5score / 100Heating 37 · Cooling 68
  3. 3GLZS4BA4210A*with ducted air handler AMST42CU1300ALegacy Systems3.5 tons · 40,500 Btu/h · DuctedNot a cold-climate pick: keeps 50% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    51% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.85 (COP at 5°F)
    Below the middle
    Winter efficiency
    7.8 (HSPF2)
    Below the middle
    Cooling efficiency
    15.2 (SEER2)
    Below the middle
    Hot-day cooling
    12.5 (EER2)
    Top 10%
    50.3score / 100Heating 32 · Cooling 68

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 Legacy Systems’s ranks on each rating, its models inside every size and type, cold-weather curves and its newest certifications.

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