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LG KUSXB421A

ENERGY STAR Certified · Mass Save Eligible HP - Split System
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Brand and components

Indoor, outdoor, and system model details

Outdoor unit brandLG
Outdoor unit modelKUSXB421A
Indoor unit modelsLKMMA42C1
Model nameKUSXB421A
Model numberKUSXB421A

Related product models

Outdoor unit model KUSXB421A LG model match
KUSXB421A product image LG KUSXB421A Air-source heat pump

Performance specs

Capacity and efficiency

Cooling Capacity (BTUH)
41000
Heating Capacity 47F (BTUH)
43000
Heating Capacity 17F (BTUH)
29000
Heating Capacity 5F (BTUH)
36000
Seer2
15.20
HSPF2 Region IV
8.50
EER2 AFull 95F
11.70
COP at 5F
1.80
Refrigerant Type
R-32

Eligibility

Rebates and certifications

Mass Save QPL
Yes
ENERGY STAR Certified
Yes
ENERGY STAR Cold Climate Certified
Yes

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Cooling · BTU/h
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SEER2
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HSPF2
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Cooling capacity (listed) · HSPF2 Region IV

Same cooling capacitySimilar cooling capacity.Lower HSPF2 (Region IV): 8.10 vs. 8.50
  • Different refrigerant: R-454B (current: R-32).
  • Lower heating capacity at 47°F: 40,000 BTU/h.
  • Lower heating capacity at 17°F: 26,400 BTU/h.
  • Lower heating capacity at 5°F: 20,000 BTU/h.
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Indoor model / pattern
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Cooling · BTU/h
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SEER2
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HSPF2
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Cooling capacity (listed) · HSPF2 Region IV

Same cooling capacitySimilar cooling capacity.Lower HSPF2 (Region IV): 8.10 vs. 8.50
  • Different refrigerant: R-454B (current: R-32).
  • Lower heating capacity at 47°F: 40,000 BTU/h.
  • Lower heating capacity at 17°F: 26,000 BTU/h.
  • Lower heating capacity at 5°F: 19,800 BTU/h.
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27SCA542A**30* — Carrier AHRI 214180030

AHRI 214180030

Indoor model / pattern
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Cooling · BTU/h
41,500
SEER2
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HSPF2
7.80

Cooling capacity (listed) · HSPF2 Region IV

Cooling capacity +1.2%Similar cooling capacity.Lower HSPF2 (Region IV): 7.80 vs. 8.50
  • Different refrigerant: R-454B (current: R-32).
  • Lower heating capacity at 47°F: 39,000 BTU/h.
  • Lower heating capacity at 17°F: 24,600 BTU/h.
  • Lower heating capacity at 5°F: 19,000 BTU/h.
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Split-system heat pump

27SPA642A**30* — Carrier AHRI 214180031

AHRI 214180031

Indoor model / pattern
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Cooling · BTU/h
41,500
SEER2
15.50
HSPF2
7.80

Cooling capacity (listed) · HSPF2 Region IV

Cooling capacity +1.2%Similar cooling capacity.Lower HSPF2 (Region IV): 7.80 vs. 8.50
  • Different refrigerant: R-454B (current: R-32).
  • Lower heating capacity at 47°F: 39,000 BTU/h.
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  • Lower heating capacity at 5°F: 19,000 BTU/h.
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Lennox

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Indoor model / pattern
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Cooling · BTU/h
41,000
SEER2
15.60
HSPF2
8.30

Cooling capacity (listed) · HSPF2 Region IV

Same cooling capacitySimilar cooling capacity.Lower HSPF2 (Region IV): 8.30 vs. 8.50
  • Different refrigerant: R-410A (current: R-32).
  • Lower heating capacity at 47°F: 40,000 BTU/h.
  • Lower heating capacity at 17°F: 26,000 BTU/h.
  • Lower heating capacity at 5°F: 22,000 BTU/h.
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Higher SEER2

Lennox

Split-system heat pump

EL17XP1-042-230A** — Lennox AHRI 210293752

AHRI 210293752

Indoor model / pattern
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Cooling · BTU/h
41,000
SEER2
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HSPF2
8.30

Cooling capacity (listed) · HSPF2 Region IV

Same cooling capacitySimilar cooling capacity.Lower HSPF2 (Region IV): 8.30 vs. 8.50
  • Different refrigerant: R-410A (current: R-32).
  • Lower heating capacity at 47°F: 40,000 BTU/h.
  • Lower heating capacity at 17°F: 26,000 BTU/h.
  • Lower heating capacity at 5°F: 22,000 BTU/h.
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Comparison does not confirm installation compatibility, availability, or current incentive eligibility. Unknown and qualified source values are not treated as zero.

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