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EG4 vs Legacy Systems: heat pump ratings compared

Against heat pumps of the same size and type, a typical EG4 model beats 66% and a typical Legacy Systems model 44%. EG4 rates higher overall.

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

EG4

66%

of similar heat pumps beaten by its typical model

Well above average

11 models listed

Legacy Systems

44%

of similar heat pumps beaten by its typical model

Below average

11 models listed

Rating by ratingEach bar is the share of same-size, same-type heat pumps that a typical model beats, so the two brands compare fairly even if they make different sizes.
  • Efficiency on a 5°F dayCOP at 5°FEG4: Beats 76%Legacy Systems: Beats 40%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FEG4: Beats 75%Legacy Systems: Beats 17%
  • Winter-long heating efficiencyHSPF2EG4: Beats 72%Legacy Systems: Beats 32%
  • Summer-long cooling efficiencySEER2EG4: Beats 58%Legacy Systems: Beats 31%
  • Hot-day cooling efficiencyEER2EG4: Beats 65%Legacy Systems: Beats 87%

Average (50%)Dashed outline: the other brand, for comparison

Want ranks, distributions per size class and cold-weather curves? Switch to Advanced

Rebate standards

Share of each brand’s models that meet the level. Programs can have other rules too.

  • CEE 2025

    EG4
    73%
    Legacy Systems
    0%

  • Xcel CC

    EG4
    73%
    Legacy Systems
    0%

  • CEE Advanced

    EG4
    0%
    Legacy Systems
    0%

  • ENERGY STAR CC

    EG4
    73%
    Legacy Systems
    0%

Top cold-climate picks, ducted 2.5–3 tons

Only units that keep at least 70% of their heat at 5°F, ranked on heat kept, efficiency at 5°F and seasonal efficiency (HSPF2), 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?

EG4

No ducted, 2.5–3 tons model from EG4.

Legacy Systems

None of Legacy Systems’s ducted, 2.5–3 tons models qualifies.

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