Every model here is cold-climate listed. Comparing low-temperature output within the same size class keeps whole-house systems from crowding out room-sized options.
22 picks from 570 matching models.
How these picks are ranked: Grouped by heating size, then ranked by the share of certified 47°F heating output retained at 5°F. HSPF2 (heating efficiency) and SEER2 (cooling efficiency) break ties. Source: official certification records only.
#1 in this size
Same housing as ACIQ-09ZPL-HP230B; small details may differ.
22 SEER2Good for small rooms around 250–300 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-06ZPL-HP230B / SCC-0609-HH-M
#2 in this size
Same housing as ACIQ-09ZPL-HP230C; small details may differ.
25.5 SEER2Good for small rooms around 250–300 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-06ZPL-HP230C / ACIQ-06W-HH-MD
#1 in this size
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27.2 SEER2Good for bedrooms or offices around 350–400 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-09ZPL-HP230C / ACIQ-09FM-HH-MD
#2 in this size
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20.5 SEER2Good for bedrooms or offices around 400–450 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-09ZPL-HP230C / ACIQ-09CD-HH-MC
#1 in this size
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33.3 SEER2Good for bedrooms or offices around 450–550 sq. ft. and cold climates.
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See full specs ↗Model #: SENE-09EL-OH / SENE-09EL-IHH
#2 in this size
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29.4 SEER2Good for bedrooms or offices around 450–550 sq. ft. and cold climates.
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See full specs ↗Model #: SENE-12EL-OH / SENE-12EL-IHH
#1 in this size
23.3 SEER2Good for open rooms around 700–1000 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-18Z-E-HH-M2
#2 in this size
21.9 SEER2Good for open rooms around 700–1000 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-18Z-E-HH-M2
#1 in this size
24 SEER2Good for large rooms around 1400–1500 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-24Z-E-HH-M3
#2 in this size
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19.2 SEER2Good for large rooms around 1400–1500 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-24ZPL-HP230B / ACIQ-24CD-HH-MB
#1 in this size
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21 SEER2Good for large rooms around 1500–2000 sq. ft. and cold climates.
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See full specs ↗Model #: ACIQ-27Z-HH-M4C
#2 in this size
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21 SEER2Good for large rooms around 1500–2000 sq. ft. and cold climates.
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See full specs ↗Model #: SENA-28HF-MOA
#1 in this size
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19.4 SEER2Good for large spaces that need load-calculation sizing and cold climates.
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See full specs ↗Model #: ACIQ-36Z-HH-M5C
#2 in this size
19.4 SEER2Good for multi-zone planning and cold climates.
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See full specs ↗Model #: 4PAMS36-HH-MZO4
#1 in this size
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19.4 SEER2Good for large spaces that need load-calculation sizing and cold climates.
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See full specs ↗Model #: ACIQ-36ZPL-HP230B / ACIQ-36CC-HH-MB
#2 in this size
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17.7 SEER2Good for large spaces that need load-calculation sizing and cold climates.
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See full specs ↗Model #: ACIQ-36ZPL-HP230C / ACIQ-36CD-HH-MC
#1 in this size
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20.4 SEER2Good for large spaces that need load-calculation sizing and cold climates.
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See full specs ↗Model #: ACIQ-48Z-HH-M6C
#2 in this size
20.4 SEER2Good for multi-zone planning and cold climates.
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See full specs ↗Model #: 4PAMS48-HH-MZO5
#1 in this size
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15.8 SEER2Good for large spaces that need load-calculation sizing and cold climates.
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See full specs ↗Model #: ACIQ-60ZPL-HP230B / ACIQ-60CD-HH-MB
#2 in this size
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16.7 SEER2Good for large spaces that need load-calculation sizing and cold climates.
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See full specs ↗Model #: ACIQ-48ZPL-HP230C / ACIQ-48CC-HH-MC
#1 in this size
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17.3 SEER2Good for large spaces that need load-calculation sizing and cold climates.
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See full specs ↗Model #: ACIQ-60ZPL-HP230B / ACIQ-60FM-HH-MB
#2 in this size
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18 SEER2Good for large spaces that need load-calculation sizing and cold climates.
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See full specs ↗Model #: ACIQ-60ZPL-HP230C / ACIQ-60FM-HH-MD