SplitAtlas

LG / Standard Efficiency R-32

LG Standard Efficiency 18k R-32 230V Mini-Split

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

The LG Standard Efficiency 18k scales the value line to 1.5 tons: SEER2 18 / EER2 12 / HSPF2 8.9 on R-32, with a notably strong 13,300 BTU of heat still delivered at its 5F floor and a 10-year parts/compressor warranty. It is a lot of trusted-brand capacity at an accessible, online-visible price.

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

$1,385 / Fresh price - checked Jul 22, 2026

Check price at HVACDirect

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

Get installation quotes
Error Codes
LG Standard Efficiency R-32 18,000 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 18k systems

Heating efficiencyBelow average

(8.9 HSPF2) among 18k systems

Cold-weather performanceBottom quartile

(70% heat retained at 5F; 5 F heating floor) among 18k systems

NoiseTop 10%

(-48 dBA indoor min / 55 dBA outdoor) among 18k systems

WarrantyAbove average

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

Feature setBottom quartile

(1 verified feature) across the catalogue

Price-to-performanceAbove average

($1,385 median retail) among 18k 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

18,000BTU/h[3]

Rated heating

19,000BTU/h[3]

Buyer review snapshot

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 15 A; breaker/fuse 20 A.
  • Line set: connection type not sourced; precharged 24.6 ft; max 65.6 ft.

Alternatives

Availability and price context

  • Verified current price: $1,385.00 at HVACDirect; availability in_stock; checked Jul 22, 2026. Dealer-installation 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

Warranty: 5 years parts and 7 years compressor as standard; 10 years parts and compressor if qualified registered installation.

Review methodology

Model context

Install path
This is professional-install equipment; retail offer context is shown separately from installation labor. Brand purchase-channel policy is shown in the buyer review snapshot.

Strengths

  • 1.5 tons of a major brand at an entry-efficiency price, available and priced online.
  • Strong low-end heat for the class: 13,300 BTU at 5F.
  • 10-year parts / 10-year compressor warranty; ENERGY STAR certified.

Weaknesses

  • SEER2 18 - value efficiency, not a high-SEER2 play.
  • Rated heating stops at 5F - not a sub-zero system.

Climate suitability

Minimum heating ambient
5 F[1]
Rated heating at 5F
13,300 BTU/h[3]
Rated heating at 17F
11,600 BTU/h[3]
Rated heating at 47F
19,000 BTU/h[3]

Specifications

Show
Manufacturer
LG
Brand
LG
Product line
Standard Efficiency R-32
Model number
KNSAE181A indoor / KUSAE181A outdoor
Indoor unit model
KNSAE181A
Outdoor unit model
KUSAE181A
Number of zones
1
Max indoor units
not published
Rated cooling capacity
18,000 BTU/h[3]
Rated heating capacity
19,000 BTU/h[3]
Voltage
208/230V[1]
MCA
15 A[1]
Maximum fuse or breaker size
20 A[1]
Breaker needed
not published
SEER2
18 SEER2[3]
EER2
12 EER2[3]
HSPF2 (Region 4)
8.9 HSPF2[3]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
3.47 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 32-48; heating 38-48 dB(A)[1]
Outdoor noise rating
55 dBA[1]
Indoor weight
26 lb[1]
Outdoor weight
92.6 lb[1]
Refrigerant
R-32[1]
Refrigerant charge
38.8 oz[2]
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 1/2 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
65.6 ft[1]
Max line set per indoor
not published
Maximum elevation difference
32.8 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
ENERGY STAR certified[4]
AHRI certification number
214931167[3]
Warranty
Standard: 5 yr parts / 7 yr compressor (standard coverage); Best case: 10 yr parts / 10 yr compressor (qualified registered installation). 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
$1,385.00
Available retailers
HVACDirect
Manual links
AHRI Directory public detail record 214931167, ENERGY STAR record for KUSAE181A / KNSAE181A, 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 KSSAE181A, HVACDirect product page KSSAE181A, KSSAE181A LG Standard Efficiency R-32 submittal, LG R32 Residential / Light Commercial Systems Warranty Card
Specification sheet
KSSAE181A 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.

Check price at HVACDirect

$1,385 / Fresh price - checked Jul 22, 2026

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
15 A[1]
Breaker needed
not published
Maximum breaker size
20 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
1/2 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
65.6 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
39-9/32 x 13-19/32 x 8-9/32 in[2]
Outdoor dimensions
34-1/4 x 25-19/32 x 13 in[2]
Indoor weight
26 lb[1]
Outdoor weight
92.6 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 18,000 BTU (230V) myself, or do I need a pro?
LG Standard Efficiency R-32 18,000 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 18,000 BTU (230V) keep heating in a cold winter?
The manufacturer publishes 13,300 BTU/h of heating output at 5F. Rated heating operation extends down to 5 F. Certified heating efficiency is 8.9 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 Standard Efficiency R-32 18,000 BTU (230V) need?
Published electrical requirements: 208/230V voltage, 15 A minimum circuit ampacity, and 20 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 65.6 ft, and the included line set comes pre-charged for 24.6 ft. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
What warranty does the LG Standard Efficiency R-32 18,000 BTU (230V) carry?
The manufacturer publishes these warranty tiers: Standard: 5 yr parts / 7 yr compressor (standard coverage); Best case: 10 yr parts / 10 yr compressor (qualified registered installation). 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.: KSSAE181A 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 214931167Sourced - AHRI directory

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

  4. ENERGY STAR: ENERGY STAR Central Air Conditioners and Air-Source Heat Pumps record 3555703Sourced - 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 Best-case compressor warranty, Best-case warranty conditions, Best-case parts warranty, Legacy compressor warranty value, Legacy warranty value, Standard compressor warranty and more

Last updated

Jul 22, 2026