SplitAtlas

LG / High Efficiency R-32

LG High Efficiency 9k R-32 230V Mini-Split

Certified capacity
9,000 BTU/h[2]
SEER2
23.8 SEER2[2]
Heating floor
-4 F[1]
Voltage
208/230V[1]
Install path
Professional install

The LG High-Efficiency 9k is the value-smart pick in LG's lineup: SEER2 23.8, EER2 14.95, HSPF2 10.9, with 10,900 BTU of heat at 47F and 9,500 BTU at 5F on R-32 - the exact same certified performance as the Art Cool Mirror 9k, in a standard (non-mirror) indoor head at a lower price. Strong efficiency and a genuine cold-weather rating without paying for looks.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

This system's warranty depends on licensed installation — get quotes from installers in your area.

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Error Codes
LG High Efficiency R-32 9,000 BTU (230V)

Image: LG

Data completeness: 95%
Last sourced
Jul 23, 2026

SplitAtlas score

8.5 / 10

Methodology
Cooling efficiencyAbove average

(23.8 SEER2) among <=9k systems

Heating efficiencyAbove average

(10.9 HSPF2) among <=9k systems

Cold-weather performanceAbove average

(5F certified capacity: 87.2% of the 47F rating; -4 F heating floor) among <=9k systems

NoiseAbove average

(21 dBA indoor min / 51 dBA outdoor) among <=9k systems

WarrantyTop quartile

(10 yr parts / 10 yr compressor) across the catalogue

Feature setBelow average

(4 verified features) across the catalogue

Documentation & partsBelow average

(8 manuals; spec sheet) across the catalogue

Not evaluated

  • Installation accessibility — not applicable (professional install)N/A

    professional install - DIY-accessibility not applicable

  • Price-to-value — not evaluatedN/A

    This is a professionally installed, quote-only system, so we can't score its price. Get an installed quote to compare real cost.

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Key ratings

Rated cooling

9,000BTU/h[2]

Rated heating

10,900BTU/h[2]

Buyer review snapshot

Best for / skip if

Best for

  • High-efficiency shortlists; SEER2 is 23.8.

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 12 A; breaker/fuse 15 A.
  • Line set: connection type not sourced; precharged 41 ft; max 82 ft.

Alternatives

Availability and price context

  • Last seen at HVACDirect on Jul 23, 2026: $1,807.00. Open the listing for today's price. Warranty condition: The online source must be expressly authorized by LG; the system must also satisfy LG's qualified-system installation terms.

Purchase channel policy

LG allows the online-purchase path only when the online source is expressly authorized by LG; an online purchase from a non-authorized source voids the limited warranty.

Warranty impact
The limited warranty is void and LG has no liability when the system is purchased online from a source not expressly authorized by LG.
Installation condition
The online source must be expressly authorized by LG; the system must also satisfy LG's qualified-system installation terms.
Authorized channel
Expressly authorized LG source with qualified installation by a trained, licensed HVAC contractor under LG warranty terms.

Buying online can keep warranty coverage only when the seller is expressly authorized by LG; confirm that status and the qualified installation path before purchase.

Compare online-purchase warranty rules by brand

Source: LG Electronics U.S.A., Inc.: LG R32 Residential / Light Commercial Systems Warranty Card; retrieved Aug 15, 2026.

Source date

Model data sourced
Jul 23, 2026
Page reviewed
Jul 23, 2026
Source-backed records
4
Newest source retrieved
Jul 23, 2026

Warranty tiers

Base
5 yr parts / 7 yr compressor - standard coverage
Registered
10 yr parts / 10 yr compressor - registration within 60 days of startup, by an installer with current LG training and an HVAC license

The score uses Registered. Additional published terms are shown for reference and not counted in the score.

Review methodology

Strengths

  • SEER2 23.8 / EER2 14.95 with a real 5F rating (9,500 BTU) - efficient and cold-capable.
  • Same certified ratings as the pricier Art Cool Mirror 9k, for less.
  • Current R-32 refrigerant; LG dealer support.

Weaknesses

  • Professional installation required; not DIY.
  • Plain indoor head - if aesthetics matter, the Mirror/Art Cool lines cost more.

Climate suitability

Minimum heating ambient
-4 F[1]
Certified heating at 5F
9,500 BTU/h[2]
Maximum heating at 5F (manufacturer)
9,500 BTU/h[1]
Rated heating at 17F
6,900 BTU/h[2]
Rated heating at 47F
10,900 BTU/h[2]

Specifications

Show
Manufacturer
LG
Brand
LG
Product line
High Efficiency R-32
Model number
KNUAB091A indoor / KUSAB091A outdoor
Indoor unit model
KNUAB091A
Outdoor unit model
KUSAB091A
Number of zones
1
Max indoor units
not published
Rated cooling capacity
9,000 BTU/h[2]
Rated heating capacity
10,900 BTU/h[2]
Voltage
208/230V[1]
MCA
12 A[1]
Maximum fuse or breaker size
15 A[1]
Breaker needed
not published
SEER2
23.8 SEER2[2]
EER2
14.95 EER2[2]
HSPF2 (Region 4)
10.9 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
2 COP[2]
Minimum outdoor heating temperature
-4 F[1]
Minimum outdoor cooling temperature
14 F[1]
Maximum outdoor temperature
118 F[1]
Indoor noise range
cooling 21-41; heating 26-41 dB(A)[1]
Outdoor noise rating
51 dBA[1]
Indoor weight
0.4 lb[1]
Outdoor weight
68.8 lb[1]
Refrigerant
R-32[2]
Refrigerant charge
28.96 oz[1]
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 3/8 in suction
Included line-set length
LG publishes field-supplied flared line sizes, standard/pre-charge length, and line limits; no included consumer line-set length is published for the professional system.
Maximum line-set length
82 ft[1]
Max line set per indoor
not published
Maximum elevation difference
49.2 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
ENERGY STAR certified[3]
AHRI certification number
215413005[2]
Warranty
Base: 5 yr parts / 7 yr compressor (standard coverage); Registered: 10 yr parts / 10 yr compressor (registration within 60 days of startup, by an installer with current LG training and an HVAC license). Score uses Registered.. Standard 5-year parts and 7-year compressor coverage; qualified registered installations extend to 10 years total parts and compressor coverage.
Install path
Professional install
Retail price
last seen at HVACDirect on Jul 23, 2026: $1,807.00
Available retailers
HVACDirect
Manual links
AHRI Directory public detail record 215413005, ENERGY STAR exact-match query for KUSAB091A/KNUAB091A, LG High Efficiency R-32 engineering manual, LG High Efficiency R-32 installation manual, LG HVAC API product metadata KSUAB091A, HVACDirect exact product page KSUAB091A, KSUAB091A LG High Efficiency R-32 submittal, LG R32 Residential / Light Commercial Systems Warranty Card
Specification sheet
KSUAB091A LG High Efficiency R-32 submittal
Last sourced date
Jul 23, 2026

Retail purchase context

Dealer-installation warranty note

Buying online can keep warranty coverage only when the seller is expressly authorized by LG; confirm that status and the qualified installation path before purchase.

Installation condition: The online source must be expressly authorized by LG; the system must also satisfy LG's qualified-system installation terms.

Dealer path: Expressly authorized LG source with qualified installation by a trained, licensed HVAC contractor under LG warranty terms.

Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure

Paid link

Dealer-installation warranty note

Buying online can keep warranty coverage only when the seller is expressly authorized by LG; confirm that status and the qualified installation path before purchase.

Check price at HVACDirect

Last seen at HVACDirect on Jul 23, 2026: $1,807

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
12 A[1]
Breaker needed
not published
Maximum breaker size
15 A[1]
Maximum fuse size
not published
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
not published

Installation considerations

Show
Liquid line
1/4 in[1]
Suction line
3/8 in[1]
Line connection type
not published
Precharged length
41 ft[1]
Included line-set length
LG publishes field-supplied flared line sizes, standard/pre-charge length, and line limits; no included consumer line-set length is published for the professional system.
Maximum line-set length
82 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
not published
Outdoor dimensions
not published
Indoor weight
0.4 lb[1]
Outdoor weight
68.8 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the LG High Efficiency R-32 9,000 BTU (230V) myself, or do I need a pro?
LG High Efficiency R-32 9,000 BTU (230V) is built for professional installation: the line set must be flared, evacuated, and charged, which requires EPA-certified refrigerant handling. Installing it outside the manufacturer's requirements can void the warranty, so budget for a qualified HVAC installer.
Will the LG High Efficiency R-32 9,000 BTU (230V) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 9,500 BTU/h of heating capacity at 5F. Rated heating operation extends down to -4 F. Certified heating efficiency is 10.9 HSPF2. Match those numbers against your climate's design temperature - in cold regions, output at 5F matters far more than the nameplate capacity measured at 47F.
What electrical circuit does the LG High Efficiency R-32 9,000 BTU (230V) need?
Published electrical requirements: 208/230V voltage, 12 A minimum circuit ampacity, and 15 A maximum breaker or fuse sizing. Confirm the final circuit against the unit nameplate and local code with a licensed electrician.
How far can the outdoor unit be from the indoor head?
The published maximum line-set length is 82 ft. The outdoor unit's factory charge covers up to 41 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
What warranty does the LG High Efficiency R-32 9,000 BTU (230V) carry?
The manufacturer publishes these warranty tiers: Base: 5 yr parts / 7 yr compressor (standard coverage); Registered: 10 yr parts / 10 yr compressor (registration within 60 days of startup, by an installer with current LG training and an HVAC license). Score uses Registered.. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. LG Electronics U.S.A., Inc.: KSUAB091A submittalSourced - manufacturer technical document

    Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Minimum circuit ampacity, Phase, Voltage range and more

  2. AHRI: AHRI Directory public detail record 215413005Sourced - AHRI directory

    Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more

  3. ENERGY STAR: ENERGY STAR exact-match record for KUSAC091A/KNSAC091ASourced - secondary source

    Covers Energy Star status

  4. LG Electronics U.S.A., Inc.: LG R32 Residential / Light Commercial Systems Warranty CardSourced - manufacturer technical document

    Covers Legacy compressor warranty value, Legacy warranty value, Registered compressor warranty, Registered warranty conditions, Registered parts warranty, Base compressor warranty and more

Last updated

Jul 23, 2026