LG / Standard Efficiency R-32
LG Standard Efficiency 12k R-32 230V Mini-Split
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.
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.
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$929 / Fresh price - checked Jul 22, 2026
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Image: HVACDirect
- Last sourced
- Jul 22, 2026
SplitAtlas score
7.8 / 10
(18.0 SEER2) among 12k systems
(8.5 HSPF2) among 12k systems
(76.4% heat retained at 5F; 5 F heating floor) among 12k systems
(-42 dBA indoor min / 50 dBA outdoor) among 12k systems
(10 yr parts / 10 yr compressor) across the catalogue
(1 verified feature) across the catalogue
($929 median retail) among 12k systems
(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
Buyer review snapshot
Install difficulty
- 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
- Daikin ATMOSPHERA 12,000 BTU R-32 208/230V (FTXM12WVJU9 / RXM12WVJU9)
9.0 score / 12k / SEER2 25.2 / -13 F heating floor / 208/230V
Exact destination at HVACDirect: $2,848.00, checked Jul 23, 2026
- Blueridge XS6 Max Efficiency 12,000 BTU R-454B 208/230V (BXS6A12WM0 / BXS6A12UC0)
8.9 score / 12k / SEER2 29.4 / -22 F heating floor / 230V
Exact destination at Alpine Home Air: $1,979.00, checked Jul 24, 2026
- Senville ELITE 12,000 BTU R-454B 208/230V (SENE-12EL-IHH / SENE-12EL-OH)
8.9 score / 12k / SEER2 29.4 / -22 F heating floor / 187-253V
Exact destination at Senville: $1,699.99, checked Jul 24, 2026
Availability and price context
- Verified current price: $929.00 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.
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
- 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]
- Rated heating at 5F
- 8,400 BTU/h[3]
- Rated heating at 17F
- 8,000 BTU/h[3]
- Rated heating at 47F
- 11,000 BTU/h[3]
Specifications
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- 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
- 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
- $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
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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 / Fresh price - checked Jul 22, 2026
Electrical requirements
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- 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
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- 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]
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- Line sets
- Line-set covers
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 manufacturer publishes 8,400 BTU/h of heating output 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, 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 12,000 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
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- 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
- 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
- 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
- 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
- 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