YISO heat pumps

11 ENERGY STAR certified YISO outdoor units (7 central, 4 packaged). The most efficient is the YOHA2-36AA at 20.5 SEER2 and 9.5 HSPF2; 11 models are rated for cold climates.

ENERGY STAR data, updated October 12, 2026

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

#		Type						Cold
1	YISO YOHA2-36AATDi Pro	Central	2.5-ton	20.5	13.0	9.5	25,200	Yes	35
2	YISO YOHA2-36CBPro	Central	2.5-ton	20.0	13.0	10.0	25,200	Yes	54
3	YISO YOHA2-60AATDi Pro	Central	3.5-ton	19.5	12.5	9.5	38,500	Yes	34
4	YISO YOHA2-60CBPro	Central	3.5-ton	19.0	12.0	10.0	38,500	Yes	57
5	YISO YRHA1-60ABRTi 2	Packaged	5-ton	19.0	11.2	9.5	39,500	Yes	1
6	YISO YRHA1-60BBRTi 2	Packaged	5-ton	19.0	11.2	9.3	39,500	Yes	1
7	YISO YOHA8-36AUltra	Central	3-ton	19.0	10.8	9.0	25,200	Yes	3
8	YISO YRHA1-60AARTi	Packaged	5-ton	18.5	11.2	9.2	38,500	Yes	1
9	YISO YOHA3-36DDTDi Select 2	Central	2.5-ton	18.5	12.0	8.8	24,000	Yes	26
10	YISO YRHA1-36ADRTi 2	Packaged	3-ton	18.3	11.0	9.2	24,600	Yes	1
11	YISO YOHA3-60DDTDi Select 2	Central	3.5-ton	17.5	11.2	8.8	39,500	Yes	26