Explore certified heat pump models

Filter every outdoor model in this refrigerant group. Each row’s numbers come from one representative AHRI certification (its best COP at 5°F). Sorting by a rating leaves out models without that rating.

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ExploreData as of Oct 11, 2026updated Oct 11, 2026 · sources

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Duct type: “Ducted (incl. mixed)” lists every model with a ducted or a mixed (multi-zone) certification, since a mixed system can serve ducted heads; “Ductless (incl. mixed)” every model with a ductless or a mixed one. The rankings compare mixed pairings with ductless units. Why

Legacy Systems(remove filter)

11 models

Sorted by manufacturer and model.

Page 1 of 1
# · Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	EER2	Btu/h @5°F	Meets	Combos	AHRI ref.
1GLZS4BA1810A*Legacy Systems · GLZS4Bwith ducted air handler AMST24BU1300A	1.5 tons18,600 Btu/h · Ducted	1.80	48%	7.5	15.2	12.5	8,700	None	66	215233069
2GLZS4BA2410ALegacy Systemswith ducted air handler 25CDX(E,Q,R,W)X+TXV	2 tons22,800 Btu/h · Ducted	1.82	43%	7.5	14.3	12.0	9,300	None	176	216980487
3GLZS4BA3010A*Legacy Systems · GLZS4Bwith ducted air handler AMST30BU1300A	2.5 tons28,400 Btu/h · Ducted	2.00	51%	7.8	14.5	12.0	14,400	None	79	215233542
4GLZS4BA3610A*Legacy Systems · GLZS4Bwith ducted air handler AMST36CU1300A	3 tons35,000 Btu/h · Ducted	1.90	50%	7.5	15.0	12.5	17,400	None	28	215233694
5GLZS4BA4210A*Legacy Systems · GLZS4Bwith ducted air handler AMST42CU1300A	3.5 tons40,500 Btu/h · Ducted	1.85	51%	7.8	15.2	12.5	20,000	None	43	215233750
6GLZS4BA4810A*Legacy Systems · GLZS4Bwith ducted air handler AMST48CU1300A	4 tons45,500 Btu/h · Ducted	2.00	43%	7.8	15.2	12.5	20,000	None	1	215233836
7GLZS4BA6010A*Legacy Systems · GLZS4Bwith ducted air handler AMST60DU1300A	4.5 tons56,500 Btu/h · Ducted	2.00	48%	8.2	14.5	12.5	27,600	None	1	215233838
8GLZS4MA1810A*Legacy Systems · GLZS4Mwith ducted air handler AMST24BU1300A	1.5 tons18,000 Btu/h · Ducted	1.80	50%	7.8	15.2	12.5	8,700	None	70	215233840
9GLZS4MA2410A*Legacy Systems · GLZS4Mwith ducted air handler AMST24BU1300A	2 tons23,800 Btu/h · Ducted	1.80	50%	7.8	15.2	12.5	11,000	None	159	215233979
10GLZS4MA3010A*Legacy Systems · GLZS4Mwith ducted air handler AMST30BU1300A	2.5 tons28,600 Btu/h · Ducted	2.00	50%	7.8	14.5	12.5	14,400	None	148	215234309
11GLZS4MA3610A*Legacy Systems · GLZS4Mwith ducted air handler AMST36CU1300A	3 tons35,000 Btu/h · Ducted	1.90	50%	7.5	15.0	12.5	17,400	None	28	215234619

Download CSV of the matching modelsAll 11 matching models, every page, in this order.