LG KUSXA181A LGRED Single Zone Mini Split Outdoor Condenser Unit with 18000 BTU Cooling Capacity, 20000 BTU Heating Capacity and Gold Fin Protection in White

LG continues to demonstrate global leadership in innovation and technology with their advancements in home comfort solutions. The LGRED° Heat ductless heat pump system boasts superior heating performance in extreme cold weather climates. The KUSXA181A is a single zone mini split outdoor condenser capable of supplying ductless heating and cooling to any room in your home. With inverter technology and quiet operation this well-rounded mini split outdoor condenser is an easy choice for any system.

• Gold Fin Condenser
• Inverter Technology

Enhanced Connectivity

LG's new R-32 mini split units require a 5-conductor cable (Not Included) instead of the standard 4-conductor, improving communication reliability and enabling a new leak detection feature.

Low Ambient Operations

This outdoor unit supports cooling operations down to 5 degrees Fahrenheit and heating operations down to -13 degrees Fahrenheit. There is also a defrost feature, which removes frost from the condenser coil in frigid conditions.

Integrated Base Pan Heater

Base pan heaters come factory installed on all LGRED° outdoor condensers in order to mitigate the risk of damage caused by freezing condensate.

Quiet Design

Thanks to a brushless direct current motor and a twin rotary compressor, the unit is significantly quieter than traditional air conditioning systems. These components reduce mechanical sound, electrical sound, and vibrations within the unit.

*Note: Indoor Unit Required to Operate

Matching Products

• Matching Air Handler Indoor Unit KNSLB181A
• Matching 4-Way Cassette Indoor Unit KNUDB181A

• Matching Mid Static Duct Indoor Unit KNUJB181A

Why Buy LG KUSXA181A LGRED Single Zone Mini Split Outdoor Condenser Unit

• LGRED° Heat Technology: Engineered for superior cold-climate performance, this system delivers strong, reliable heating even in extreme winter conditions.
• Low Ambient Heating: Capable of maintaining warmth in freezing temperatures, the unit operates efficiently in outdoor conditions as low as -13°F.
• Built-In Base Pan Heater: A factory-installed base pan heater prevents condensate from freezing within the unit, protecting against cold-weather damage and ensuring consistent operation.
• Inverter Technology: Featuring a variable-speed compressor and electronic expansion valve, the system precisely controls refrigerant flow to reduce energy use and maintain stable indoor temperatures.
• Quiet Design: With a brushless direct current motor and twin rotary compressor, the unit minimizes operational noise, running as quietly as 52 dB—ideal for residential comfort.
• Gold Fin Protection: The heat exchanger is coated with LG’s anti-corrosive Gold Fin finish, enhancing durability by resisting damage from moisture, salt, and pollutants.
• Improved Communication: The unit utilizes a 5-conductor communication cable (sold separately) for greater system reliability and includes a built-in refrigerant leak detection feature.
• Trusted Certifications: This model is Energy Star listed, CSA-listed, and AHRI certified—assuring that it meets rigorous standards for energy efficiency, safety, and performance.

Frequently Asked Questions

Q: What are the operating temperature ranges?

A: The unit operates in:

• Cooling Mode: Operates between 5°F and 118°F
• Heating Mode: Operates between -13°F and 64°F

Q: What are the key features of the LGRED Single Zone Mini Split Outdoor Condenser Unit?

A: Notable features include:

• High efficiency with inverter technology, a variable-speed compressor, and an electronic expansion valve for precise refrigerant control.
• Quiet operation, using a brushless DC motor and twin rotary compressor to reduce sound and vibration.
• Enhanced durability via a corrosion-resistant Gold Fin™ coating on the heat exchanger.
• Cold climate readiness, including a factory-installed base pan heater to prevent freezing and damage.
• Smart connectivity, requiring a 5-conductor cable for stable communication with the indoor unit and featuring built-in leak detection.

Q: What accessories are required for installation?

A: The following components are typically needed:

• Line set: Double-insulated tubing for refrigerant flow
• Drain tubing: For removing condensate
• Disconnect box and whip kit: For electrical connection to your home’s fuse box
• Connecting wire: To deliver power and signals from the condenser to the indoor unit
• Outdoor condenser pad or wall bracket: To keep the unit off the ground and ensure stable mounting

Q: What are the electrical requirements for this unit?

A: Electrical requirements are:

• Voltage: 208–230V
• Phase: Single-phase
• Frequency: 60Hz
• Wiring for Outdoor Unit (ODU): 3 x 12 AWG cable required

Q: How does inverter technology improve performance?

A: Inverter technology uses a variable-speed compressor to continuously adjust refrigerant flow, maintaining consistent temperatures and eliminating energy-wasting on/off cycles. This provides better comfort and energy efficiency than traditional systems.

Q: What is the purpose of the Gold Fin protection?

A: The Gold Fin coating on the heat exchanger prevents corrosion, extending the lifespan of the unit—especially beneficial in coastal or high-humidity environments.

Q: How does the base pan heater function in cold climates?

A: The factory-installed base pan heater prevents water from freezing in the drain pan. This helps protect the unit and ensures reliable operation in sub-freezing temperatures.

Pros

• Good heating/cooling balance for moderate sized spaces; works in both warm and cold climates (good low ambient performance).
• Energy efficient: strong SEER2, solid EER, and good HSPF make for lower running costs.
• Use of R-32 refrigerant is more environmentally friendly.
• Low sound compared to many similar capacity units.
• Flexible installation options: long piping runs allow placement where needed.
• Durable finish (Gold Fin) resists corrosion, helpful especially in external/outdoor conditions.

Cons

• Even though “quiet,” ~52 dB is noticeable; in very quiet settings or bedrooms indoors, might still be audible.
• Requires compatible indoor unit / matching system; cost adds up when including indoor heads + piping + installation.
• Needs proper electrical setup (208-230V, appropriate breaker) which might require upgrading service in certain homes.
• For very low temperatures, heating capacity drops (as is common with heat pumps) — performance less strong in extreme cold.
• Size and weight are considerable (~ 140-160 lbs range), needs sturdy pad or mounting.

Conclusion

The LG KUSXA181A is a strong option if you want a high-quality single-zone outdoor heat pump condenser for moderate to large indoor spaces, particularly where environmental efficiency and quieter operation are valued. It’s well suited for climates with cold winters because of its good low-ambient heating performance, though as with most heat pumps, output diminishes in extreme cold.