SplitAtlas

LG / Standard Efficiency R-32

LG Standard Efficiency 12k R-32 230V Mini-Split

Certified capacity
11,000 BTU/h[3]
SEER2
18 SEER2[3]
Heating floor
5 F[1]
Voltage
208/230V[1]
Install path
Professional install

The LG Standard Efficiency 12k brings the same value proposition to a larger room: a trusted brand, SEER2 18 / EER2 12 / HSPF2 8.5 on R-32, a 10-year parts and compressor warranty, and real online availability and pricing. It is the sensible-middle 1-ton choice when you want a known name without paying premium-line money.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

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.

Paid link

$929 / Checked Jul 22, 2026

$929 at HVACDirect

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

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Error Codes
LG Standard Efficiency R-32 12,000 BTU (230V)

Image: HVACDirect

Data completeness: 100%
Last sourced
Jul 22, 2026

SplitAtlas score

7.8 / 10

Methodology
Cooling efficiencyBottom quartile

(18.0 SEER2) among 12k systems

Heating efficiencyBottom quartile

(8.5 HSPF2) among 12k systems

Cold-weather performanceBelow average

(5F certified capacity: 76.4% of the 47F rating; 5 F heating floor) among 12k systems

NoiseTop quartile

(21 dBA indoor min / 50 dBA outdoor) among 12k systems

WarrantyTop quartile

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

Feature setBottom quartile

(1 verified feature) across the catalogue

Price-to-performanceBelow average

($929 median retail) among 12k systems

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

Key ratings

Rated cooling

11,000BTU/h[3]

Rated heating

11,000BTU/h[3]

Buyer review snapshot

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 10 A; breaker/fuse 15 A.
  • Line set: connection type not sourced; precharged 24.6 ft; max 49.2 ft.

Alternatives

Availability and price context

  • Last seen at HVACDirect on Jul 22, 2026: $929.00. 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 22, 2026
Page reviewed
Jul 22, 2026
Source-backed records
5
Newest source retrieved
Jul 22, 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

Model context

Install path
This is professional-install equipment; the listed price is for the equipment, so add installation labor. The Buyer review snapshot covers the brand's rules on online purchases.

Strengths

  • Trusted brand, stocked and priced online for predictable total cost.
  • 10-year parts / 10-year compressor warranty.
  • R-32 refrigerant and ENERGY STAR certified.

Weaknesses

  • SEER2 18 is entry-level - fine for mild or moderate use, but the efficiency premium of higher lines pays back in cold/heavy-use climates.
  • Rated only to 5F - not for deep-cold heating.

Climate suitability

Minimum heating ambient
5 F[1]
Certified heating at 5F
8,400 BTU/h[3]
Maximum heating at 5F (manufacturer)
8,400 BTU/h[1]
Rated heating at 17F
8,000 BTU/h[3]
Rated heating at 47F
11,000 BTU/h[3]

Specifications

Show
Manufacturer
LG
Brand
LG
Product line
Standard Efficiency R-32
Model number
KNSAE121A indoor / KUSAE121A outdoor
Indoor unit model
KNSAE121A
Outdoor unit model
KUSAE121A
Number of zones
1
Max indoor units
not published
Rated cooling capacity
11,000 BTU/h[3]
Rated heating capacity
11,000 BTU/h[3]
Voltage
208/230V[1]
MCA
10 A[1]
Maximum fuse or breaker size
15 A[1]
Breaker needed
not published
SEER2
18 SEER2[3]
EER2
12 EER2[3]
HSPF2 (Region 4)
8.5 HSPF2[3]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
3.44 COP[2]
COP at 5F
1.7 COP[3]
Minimum outdoor heating temperature
5 F[1]
Minimum outdoor cooling temperature
14 F[1]
Maximum outdoor temperature
118 F[1]
Indoor noise range
cooling 21-42; heating 28-42 dB(A)[1]
Outdoor noise rating
50 dBA[1]
Indoor weight
19.2 lb[1]
Outdoor weight
55.3 lb[1]
Refrigerant
R-32[1]
Refrigerant charge
24.7 oz[2]
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
49.2 ft[1]
Max line set per indoor
not published
Maximum elevation difference
23 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
ENERGY STAR certified[4]
AHRI certification number
214931166[3]
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
$929.00
Available retailers
HVACDirect
Manual links
AHRI Directory public detail record 214931166, ENERGY STAR record for KUSAE121A / KNSAE121A, LG R32 Single-Zone Standard Efficiency, Mega, and Mega 115V Wall-Mounted Engineering Manual, LG R32 Standard Efficiency wall-mounted installation manual, LG DDepot product page KSSAE121A, HVACDirect product page KSSAE121A, KSSAE121A LG Standard Efficiency R-32 submittal, LG R32 Residential / Light Commercial Systems Warranty Card
Specification sheet
KSSAE121A LG Standard Efficiency R-32 submittal
Last sourced date
Jul 22, 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.

$929 at HVACDirect

$929 / Checked Jul 22, 2026

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
10 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
14 AWG minimum four-conductor indoor-outdoor connection cable; field supplied[1]

Installation considerations

Show
Liquid line
1/4 in[1]
Suction line
3/8 in[1]
Line connection type
not published
Precharged length
24.6 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
49.2 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
32-15/16 x 12-1/8 x 7-7/16 in[2]
Outdoor dimensions
28-7/32 x 19-1/2 x 9-1/16 in[2]
Indoor weight
19.2 lb[1]
Outdoor weight
55.3 lb[1]
Drain size
27/32 in O.D.; 5/8 in I.D.[2]

Related systems and guides

Frequently asked questions

Can I install the LG Standard Efficiency R-32 12,000 BTU (230V) myself, or do I need a pro?
LG Standard Efficiency R-32 12,000 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 Standard Efficiency R-32 12,000 BTU (230V) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 8,400 BTU/h of heating capacity at 5F. Rated heating operation extends down to 5 F. Certified heating efficiency is 8.5 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 Standard Efficiency R-32 12,000 BTU (230V) need?
Published electrical requirements: 208/230V voltage, 10 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 49.2 ft. The outdoor unit's factory charge covers up to 24.6 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
What warranty does the LG Standard Efficiency R-32 12,000 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.: KSSAE121A submittalSourced - manufacturer technical document

    Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Minimum circuit ampacity, Phase, Manufacturer wire notes and more

  2. LG Electronics U.S.A., Inc.: R32 Single-Zone Standard Efficiency, Mega, and Mega 115V Wall-Mounted Engineering ManualSourced - manufacturer technical document

    Covers Drain size, Indoor dimensions, Outdoor dimensions, Refrigerant charge, performance_spec.cop_at_17f, COP at 47F

  3. AHRI: AHRI Directory public detail record 214931166Sourced - AHRI directory

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

  4. U.S. Environmental Protection Agency ENERGY STAR: ENERGY STAR Central Air Conditioners and Air-Source Heat Pumps record 3555706Sourced - Energy Star listing

    Covers Energy Star status

  5. 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 22, 2026