American Standard / Mitsubishi Electric heat pumps

40 ENERGY STAR certified American Standard / Mitsubishi Electric outdoor units (40 mini-split). The most efficient is the NAXSPH06B112A at 32.2 SEER2 and 11.9 HSPF2; 35 models are rated for cold climates.

Some of these units are also certified under Trane / Mitsubishi Electric.

ENERGY STAR data, updated October 12, 2026

40 models, ranked by SEER2 (cooling efficiency), then HSPF2.

#							Cold
1	American Standard / Mitsubishi Electric NAXSPH06B112AM-Series	6,000 BTU	32.2	19.1	11.9	10,500	Yes	1
2	American Standard / Mitsubishi Electric MUZ-FS06NAM-Series	6,000 BTU	32.2	19.1	11.9	10,500	Yes	3
3	American Standard / Mitsubishi Electric NAXSPB06B112AM-Series	6,000 BTU	32.2	19.1	10.9	10,500	Yes	1
4	American Standard / Mitsubishi Electric MUZ-FS06NAHM-Series	6,000 BTU	32.2	19.1	10.9	10,500	Yes	3
5	American Standard / Mitsubishi Electric NAXSPH09B112AM-Series	9,000 BTU	29.8	16.1	10.9	11,300	Yes	1
6	American Standard / Mitsubishi Electric MUZ-FS09NAM-Series	9,000 BTU	29.8	16.1	10.9	11,300	Yes	3
7	American Standard / Mitsubishi Electric NAXSPB09B112AM-Series	9,000 BTU	29.8	16.1	10.0	11,300	Yes	1
8	American Standard / Mitsubishi Electric MUZ-FS09NAHM-Series	9,000 BTU	29.8	16.1	10.0	11,300	Yes	3
9	American Standard / Mitsubishi Electric MUZ-GS09NAM-Series	9,000 BTU	28.4	15.4	10.9	7,900	Yes	3
10	American Standard / Mitsubishi Electric MUZ-GS09NAHZM-Series	9,000 BTU	28.4	15.4	9.6	9,600	Yes	3
11	American Standard / Mitsubishi Electric NAXSPH12B112AM-Series	12,000 BTU	26.3	13.8	11.1	14,700	Yes	1
12	American Standard / Mitsubishi Electric MUZ-FS12NAM-Series	12,000 BTU	26.3	13.8	11.1	14,700	Yes	3
13	American Standard / Mitsubishi Electric MUZ-FS12NAHM-Series	12,000 BTU	26.3	13.8	10.4	14,700	Yes	3
14	American Standard / Mitsubishi Electric MUZ-GS12NAM-Series	12,000 BTU	25.6	13.1	10.7	10,100	Yes	3
15	American Standard / Mitsubishi Electric NAXSPH15B112AM-Series	15,000 BTU	22.3	14.0	10.4	19,400	Yes	1
16	American Standard / Mitsubishi Electric MUZ-FS15NAM-Series	15,000 BTU	22.3	14.0	10.4	19,400	Yes	3
17	American Standard / Mitsubishi Electric NAXSPB15B112AM-Series	15,000 BTU	22.3	14.0	9.9	19,400	Yes	1
18	American Standard / Mitsubishi Electric MUZ-FS15NAHM-Series	15,000 BTU	22.3	14.0	9.9	19,400	Yes	3
19	American Standard / Mitsubishi Electric MUZ-GS12NAHZM-Series	12,000 BTU	21.7	13.1	9.6	12,300	Yes	3
20	American Standard / Mitsubishi Electric MUZ-GS18NAM-Series	18,000 BTU	21.5	13.5	10.3	14,700	No	3
21	American Standard / Mitsubishi Electric MUZ-GS24NAM-Series	24,000 BTU	21.5	12.6	10.3	19,700	Yes	3
22	American Standard / Mitsubishi Electric MUZ-GS18NAHZM-Series	18,000 BTU	21.5	13.5	9.6	19,000	Yes	3
23	American Standard / Mitsubishi Electric MUZ-GS24NAHZM-Series	24,000 BTU	21.5	12.6	9.0	21,200	Yes	3
24	American Standard / Mitsubishi Electric MUZ-GS15NAM-Series	15,000 BTU	21.0	12.8	11.0	14,000	Yes	3
25	American Standard / Mitsubishi Electric NAXSPH18B112AM-Series	18,000 BTU	21.0	12.5	10.7	22,400	Yes	1
26	American Standard / Mitsubishi Electric MUZ-FS18NAM-Series	18,000 BTU	21.0	12.5	10.7	22,400	Yes	3
27	American Standard / Mitsubishi Electric MUZ-FS18NAHM-Series	18,000 BTU	21.0	12.5	10.3	22,400	Yes	3
28	American Standard / Mitsubishi Electric MUZ-GS15NAHZM-Series	15,000 BTU	21.0	12.8	9.4	14,000	Yes	3
29	American Standard / Mitsubishi Electric NTXMMX24A132CNV-Series	24,000 BTU	20.0	13.6	10.0	19,800	Yes	6
30	American Standard / Mitsubishi Electric MUZ-HM09NAM-Series	9,000 BTU	20.0	12.0	10.0	-	No	3
31	American Standard / Mitsubishi Electric MUZ-HM15NAM-Series	15,000 BTU	20.0	12.0	10.0	-	No	3
32	American Standard / Mitsubishi Electric NTXMMX20A122CNV-Series	18,000 BTU	20.0	12.7	9.7	11,000	No	3
33	American Standard / Mitsubishi Electric NTXMMX24A132BNV-Series	24,000 BTU	20.0	13.6	9.5	18,200	Yes	5
34	American Standard / Mitsubishi Electric NTXSKH18A112AANV-Series	18,000 BTU	19.2	12.5	9.2	21,600	Yes	4
35	American Standard / Mitsubishi Electric NTXMPH24A132CNV-Series	24,000 BTU	19.0	13.5	10.0	25,000	Yes	4
36	American Standard / Mitsubishi Electric NTXMPH24A132BNV-Series	24,000 BTU	19.0	13.5	9.0	25,000	Yes	2
37	American Standard / Mitsubishi Electric NTXMPH30A132CNV-Series	30,000 BTU	18.0	12.5	10.0	28,600	Yes	6
38	American Standard / Mitsubishi Electric NTXMPH30A132BNV-Series	30,000 BTU	18.0	12.5	9.7	28,600	Yes	2
39	American Standard / Mitsubishi Electric MUZ-WR09NAM-Series	9,000 BTU	18.0	11.0	8.5	-	No	3
40	American Standard / Mitsubishi Electric NTXMPH20A122CNV-Series	18,000 BTU	17.0	13.5	10.0	21,600	Yes	4