Rank	Brand	Model	COP@5°F	SEER2	HSPF2
	Trane	5TWX5036A1	3.03	17.0	8.5
	York	XH436E2S11	3.02	15.2	7.5
	York	HH824E2S11	3.00	19.0	9.5
4	Mitsubishi Electric	SUZ-AA36NL***	3.00	19.4	9.3
5	Mitsubishi Electric	SUZ-AA18NL***	3.00	17.2	10.4
6	Mitsubishi Electric	SUZ-AA15NL***	3.00	18.8	9.7
7	Mitsubishi Electric	SUZ-AA09NL***	3.00	18.8	11.5
8	Trane	A5HP5036A1	3.00	16.0	8.5
9	York	XH436E2S11	2.99	15.2	7.8
10	Trane	5TWV0X24A1	2.99	22.4	10.0

Rankings based on analysis of 8,555 heat pump models. Market average COP@5°F is 2.02, average SEER2 is 17.8.

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Efficiency Leaders

The top-performing heat pumps across key efficiency metrics.

Highest COP at 5°F - best for extreme cold

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York

3.02 COP

Trane

3.03 COP

York

3.00 COP

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Top units for best cold climate

Rank	Brand	Model	COP@5°F	SEER2	HSPF2
	Trane	5TWX5036A1	3.03	17.0	8.5
	York	XH436E2S11	3.02	15.2	7.5
	York	HH824E2S11	3.00	19.0	9.5
4	Mitsubishi Electric	SUZ-AA36NL***	3.00	19.4	9.3
5	Mitsubishi Electric	SUZ-AA18NL***	3.00	17.2	10.4
6	Mitsubishi Electric	SUZ-AA15NL***	3.00	18.8	9.7
7	Mitsubishi Electric	SUZ-AA09NL***	3.00	18.8	11.5
8	Trane	A5HP5036A1	3.00	16.0	8.5
9	York	XH436E2S11	2.99	15.2	7.8
10	Trane	5TWV0X24A1	2.99	22.4	10.0

Rankings based on analysis of 8,555 heat pump models. Market average COP@5°F is 2.02, average SEER2 is 17.8.

Continue Exploring

All-time records: highest SEER2, best COP@5°F, and more.

Which brand is #1 in cooling, heating, and cold climate efficiency.

Discover underrated heat pumps with exceptional efficiency that fly under the radar.