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LG Ductless Mini Split Heat Pump System - Single-Zone - 18k BTU - 23.0 SEER2 - R-32
Model:
KSUAB181A
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Recommended Accessories

Expert Recommended Accessories
Selected by Ken, our Expert
Required Accessories
9
These accessories are required to properly setup/install this product.
Optional Accessories
10
Features
- Enhanced Connectivity
- LG's new R-32 mini split units use a 5-conductor cable (Not Included) instead of the standard 4-conductor, improving communication reliability and enabling a new leak detection feature.
- Inverter Technology
- LG's heat pump systems are designed with efficient inverter technology. An electronic expansion valve and a variable speed compressor carefully regulate the refrigerant flow, reducing energy consumption and allowing for consistent, accurate temperatures.
- Built-In Wi-Fi
- The KNUAB181A has built-in Wi-Fi, enabling the control of your LG air conditioner with smart enabled devices. Simply download the SmartThinQ® app on your smart device to get started.
- Integrated Base Pan Heater
- The KUSAB181A Outdoor Condenser features a factory-installed base pan heater in the drain pan. This prevents condensate from freezing and damaging the unit in frigid climates.
- Gold Fin Protection
- To ensure the reliability and longevity of the KUSAB181A's heat exchanger, LG employs a Gold Fin coating that prevents corrosion and improves durability.
- Quiet Design
- The KNUAB181A indoor unit features a cross flow fan that restricts the pressure of air flow and lowers sound levels. Both the outdoor and indoor units enjoy reduced electrical and mechanical sound thanks to their brushless direct current fan motors.
- Self-Cleaning Coil
- The KNUAB181A features a self-cleaning heat exchanger coil that automatically removes dirt and moisture. This helps to prevent unpleasant odors and to combat the formation of mold.
- Jet Temperature Control
- Quickly get your zone comfortable with the Jet Heat and Jet Cool modes. With the press of a button, your system will temporarily adjust the set point and fan speed to provide rapid heating or cooling.
- Sleep Mode
- With the Sleep Mode and Timer functions, you can set the indoor unit to save energy at night. Sleep Mode will incrementally adjust temperature for an hour before the Timer function automatically deactivates the unit.
- Dehumidify
- LG's indoor units include a dehumidifying operation mode. In this mode, the unit's internal sensors monitor temperature and modify the set point and fan speed to remove moisture from the air.
- Improved Air Quality
- The KNUAB181A uses a dual filtration system to keep your air clean. A washable anti-fungal filter protects against dust and bacteria, while a 3M Micro Protection Filter captures microscopic irritants for pristine air quality.
- (1) LG High Efficiency Outdoor Condenser - Single-Zone - 18k BTU - R-32 (KUSAB181A)
- (1) LG Wall Mounted Unit - Multi or Single-Zone - 18k BTU - R-32 (KNUAB181A)
- Line Set - This double insulated tubing transfers refrigerant efficiently between your outdoor condenser and indoor units.
- Drain Tubing - Drain tubing facilitates the reliable and effective removal of condensate from your system. It connects your indoor units to drain locations of your choosing.
- Disconnect Box & Electrical Whip Kit - The Disconnect Box & Whip Kit provides a safe and simple way to connect your outdoor condenser to your fuse box.
- Connecting Wire - This durable, insulated wire provides power to your indoor units from your outdoor condenser.
- Outdoor Condenser Plastic Pad or Wall Bracket - We recommend outdoor condensers should not be placed directly on the ground. An outdoor condenser pad or wall bracket will provide a stable way to mount your condenser free from obstructions and debris. Adding these accessories to your order will provide a complete, ready-to-install mini split system. All Mini Split Systems require one Primary Mini Split Installation Kit.
LG's devotion to providing efficient ductless solutions can be seen across their entire catalog. The High Efficiency lineup of ductless heat pump systems sport high SEER ratings, low sound levels, and robust functionality for heating and cooling nearly any space. The KSUAB181A brings you 23.0 SEER operations with indoor sound levels as low as 31 dB. This system also makes it easy to stay comfortable thanks to several automatic operation modes that may be set with the system's convenient wireless handheld remote controller. An easy installation process rounds out this system, which makes a great addition to nearly any home.
Product Includes
Product Note
This product requires the following accessories for installation:
Specifications
Product Includes
- (1) LG High Efficiency Outdoor Condenser - Single-Zone - 18k BTU - R-32 (KUSAB181A)
- (1) LG Wall Mounted Unit - Multi or Single-Zone - 18k BTU - R-32 (KNUAB181A)
KSUAB181A

General Information
Type
Wall Mounted
Product Line
High Efficiency
Product Category
Mini Split Heat Pump System
Operating Mode
Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More
Heating and Cooling
Number of Zones
Number of Zones
A zone is a room or area within a building that has its own temperature control.
1
Refrigerant Type
R-32
Indoor Unit Size(s)
Indoor Unit Size(s)
Mini split systems can have one or more indoor units connected to a single outdoor unit. Indoor Unit Size(s) specifies what indoor unit sizes are used in a system. We have combined 6k and 7k indoor units to enhance searchability.
18
Outdoor Unit Size
18000 BTU
DOE Regional Compliance
DOE Regional Compliance
In 2015, the US Department of Energy broke the country into three regions - North, Southeast, and Southwest - and set legal standards for energy efficiency within each region. Learn More
Nationwide
Line Set Size
3/8" x 5/8"
Performance
Cooling BTU
18000
Cooling Capacity
18000 BTU
Heating Capacity
21600 BTU
Maximum Sound Level
Maximum Sound Level
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB. Learn More
47 dB
Low Ambient Heating
Yes
Minimum Outdoor Temperature for Heating
Minimum Outdoor Temperature for Heating
This is the lowest rated outdoor temperature for heating operation. Because heat pumps rely on heat available in outdoor air, the amount of heat they are able to supply decreases with outdoor temperatures. Learn More
-4 F
Minimum Outdoor Temperature for Cooling
14 F
SEER2
SEER2
The U.S Department of Energy has raised the minimum rating requirements starting in 2023 that include updated testing conditions and metrics to better reflect real-world conditions. SEER2 (Seasonal Energy Efficiency Ratio) is a measurement of cooling efficiency over a typical cooling season. It is useful for comparing energy efficiency of cooling systems. The higher the SEER2, the more energy efficient the system.
23.0
EER2
EER2
The U.S Department of Energy has raised the minimum rating requirements starting in 2023 that include updated testing conditions and metrics to better reflect real-world conditions. EER2 (Energy Efficiency Ratio) is a measurement of cooling efficiency under fixed conditions. It is useful for comparing units that will operate consistently under one set of conditions (e.g. server room). The higher the EER2, the more efficient the system.
13.0
HSPF2
HSPF2
The U.S Department of Energy has raised the minimum rating requirements starting in 2023 that include updated testing conditions and metrics to better reflect real-world conditions. HSPF2 (Heating Seasonal Performance Factor) is a measure of heating efficiency for heat pumps. It is useful for comparing energy efficiency of heat pumps. The higher the HSPF2, the more efficient the system.
10.0
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Minimum Circuit Ampacity
19 Amps
Recommended Breaker Size
30 Amps
Dimensions
Suction Connection Size
5/8 Inch
Liquid Connection Size
3/8 Inch
Product Weight
153.9 Pounds
Shipping Weight
177.3 Pounds
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
KUSAB181A
General Information
Type
Outdoor Condenser
Product Line
High-Efficiency
Product Category
Mini Split System Components
Operating Mode
Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More
Heating and Cooling
Maximum Number of Zones
1
Multi-Zone Compatible
No
Refrigerant Type
R-32
Installation Location
Outdoor
Performance
Cooling BTU
18000
Cooling Capacity
18000 BTU
Heating Capacity
21600 BTU
Maximum Sound Level
Maximum Sound Level
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB. Learn More
55 dB
Low Ambient Heating
Yes
Minimum Outdoor Temperature for Heating
Minimum Outdoor Temperature for Heating
This is the lowest rated outdoor temperature for heating operation. Because heat pumps rely on heat available in outdoor air, the amount of heat they are able to supply decreases with outdoor temperatures. Learn More
-4 F
Minimum Outdoor Temperature for Cooling
14 F
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Minimum Circuit Ampacity
19 Amps
Recommended Breaker Size
30 Amps
Dimensions
Maximum Line Length
114.8 Feet
Gas Connection Size
5/8 Inch
Liquid Connection Size
3/8 Inch
Product Height
32 3/4 Inches
Product Width
37 19/48 Inches
Product Depth
13 Inches
Product Weight
127.9 Pounds
Shipping Weight
145.5 Pounds
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Compressor Warranty
7 Years
KNUAB181A
General Information
Type
Wall Mounted
Product Line
Multi F
Product Category
Mini Split System Components
Operating Mode
Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More
Heating and Cooling
Multi-Zone Compatible
Yes
Refrigerant Type
R-32
Remote Control
Wireless
Indoor Unit Size(s)
Indoor Unit Size(s)
Mini split systems can have one or more indoor units connected to a single outdoor unit. Indoor Unit Size(s) specifies what indoor unit sizes are used in a system. We have combined 6k and 7k indoor units to enhance searchability.
18
Installation Location
Indoor
Performance
Cooling BTU
18000
Cooling Capacity
18000 BTU
Heating Capacity
21600 BTU
Moisture Removal
5.50 Pints/Hour
Maximum Air Flow
558 CFM
Minimum Air Flow
353 CFM
Minimum Sound Level
34 dB
Maximum Sound Level
Maximum Sound Level
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB. Learn More
44 dB
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
1/2 Inch
Liquid Connection Size
1/4 Inch
Product Height
13 29/48 Inches
Product Width
39 13/48 Inches
Product Depth
9 13/48 Inches
Product Weight
26 Pounds
Shipping Weight
31.8 Pounds
Certifications
CSA Listed
Yes
AHRI Certified
Yes
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
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LG Ductless Mini Split Heat Pump System - Single-Zone - 18k BTU - 23.0 SEER2 - R-32






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