As of June 2026
Category Kings
The undisputed champions of each efficiency category. The best of the best.
Categories
Models Analyzed
Dynasty Brand
2 wins
Close Races
Current category leaders (June 2026): Best Cold Climate Performance: Trane (3.03 COP) • Best Cooling Efficiency: Midea (35.10 SEER2) • Best Peak Cooling Efficiency: Carrier (18.00 EER2) • Best Heating Efficiency: Lennox (16.20 HSPF2)
Best Cold Climate Performance
Highest COP at 5°F outdoor temperature
Trane
5TWX5036A1
COP @ 5°F
3.03COP
Best Cooling Efficiency
Highest SEER2 rating for cooling
Midea
37MPRAQ06AA3
SEER2
35.10SEER2
Best Peak Cooling Efficiency
Highest EER2 rating for peak demand cooling
Carrier
D5CSHAH06AAK
EER2
18.00EER2
Best Heating Efficiency
Highest HSPF2 rating for heating
Lennox
A-ZHP18SA-1
HSPF2
16.20HSPF2
Best Capacity Retention
Highest heating capacity at 5°F vs 47°F
Lennox
A-ZHP06SA-1
Capacity Ratio
150.00%
Dynasty Brand
Lennox
Dominates 2 categories
Close Races
Categories where top 3 are within 5% of each other
Best Cold Climate Performance
Top 3 within 1% of each other
Best Cooling Efficiency
Top 3 within 0.3% of each other
Best Peak Cooling Efficiency
Top 3 within 0% of each other
Capacity Kings
Best performers in each capacity tier
Capacity
System Type
9k-12k BTU
Single room, small spaces
2,989
models analyzed
Mitsubishi Electric
SUZ-AA09NL***
3.00 COP
Midea
37MPRAQ06AA3
35.10 SEER2
Carrier
D5CSHAH06AAK
18.00 EER2
Carrier
D5CPRAH06AAK
15.60 HSPF2
Crowned from the Competition
These category kings represent the absolute best performers in their respective categories, each dominating their metric across all heat pump models in the market.
