LG's devotion to providing efficient ductless solutions can be seen across the Multi F line of indoor units. Part of the Four-Way Ceiling Cassette lineup of mini split indoor units, the unit combines powerful multi-directional air flow with a low-profile design, allowing you to heat and cool large rooms discreetly. Thanks to the recessed installation design, a grille less than 1" thick is the only visible part of the installed unit .
- AHRI Certified
- Jet Cool
- Sleep Mode
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.
Air Flow Options
The unit offers two automated air flow options: Swing Mode and Swirl Wind mode. Any of these modes can be activated to provide optimal circulation specific to your home.
Quiet Design
The unit can operate at volumes as low as 30 dB thanks to its advanced fan motor. The brushless direct current motor reduces electrical and mechanical sound while providing powerful air movement.
Automated Operation
Auto operation mode continually compares your zone's current and desired temperatures and uses that data to intelligently adjust the unit's fan speed and refrigerant flow to provide optimal comfort.
Condensate Protection
Condensate overflow can damage your indoor unit and your home. An internal condensate pump with 27.5" of lift protects the unit through reliable, effective condensate removal.
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 unit features an anti-fungal filter to keep your air clean. This filter captures contaminants like dust and bacteria, and it is washable to ensure long term air quality.
Hot-Start
When the hot-start function is enabled, the unit's fan will not engage until the outdoor condenser has had the opportunity to warm the indoor coil. This prevents the unit from blowing cold air during heating operations.
*Note: Outdoor Unit Required to Operate
Matching Products
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- Matching 24000 BTU LGRED Multi-Zone Outdoor Unit KUMXA241A
- Matching 30000 BTU LGRED Multi-Zone Outdoor Unit KUMXA301A
- Matching 36000 BTU LGRED Multi-Zone Outdoor Unit KUMXA361A
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Why should you buy LG KNUDB121A ?
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Recessed Installation
Designed for ceiling installation with a grille less than 1" thick, ensuring a discreet and modern appearance.
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Compact Dimensions
Measures 24-13/32" x 24-13/32" x 9-17/32", fitting standard ceiling grids for easy integration.
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Four-Way Airflow
Equipped with four air outlets, providing consistent and effective air distribution across the room.
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Quiet Performance
Operates at sound pressure levels as low as 32 dB, thanks to its brushless DC motor, ensuring a tranquil environment.
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Jet Cool Mode
Activates rapid cooling by temporarily adjusting the temperature and fan speed for 30 minutes, quickly bringing the room to a comfortable level.
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Auto Operation
Continuously compares the room's current and desired temperatures to intelligently adjust fan speed and refrigerant flow for optimal comfort.
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Sleep Mode
Gradually adjusts the temperature over an hour before the timer function automatically deactivates the unit, promoting energy savings during the night.
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Dehumidification Mode
Monitors temperature and adjusts settings to effectively remove moisture from the air, enhancing indoor air quality.
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Condensate Protection
Features an internal condensate pump with a 27.5" lift, ensuring reliable and effective condensate removal.
Frequently Asked Questions by Customers
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What type of unit is the LG KNUDB121A?
Answer: The LG KNUDB121A is a 12,000 BTU ceiling cassette indoor unit designed for use in both single-zone and multi-zone mini-split systems. It is part of LG’s Multi F Four-Way Ceiling Cassette lineup, offering efficient heating and cooling solutions for residential and light commercial spaces.
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What are its cooling and heating capacities?
Answer: The unit provides a nominal cooling capacity of 12,000 BTU/h and a nominal heating capacity of 13,800 BTU/h, making it suitable for medium-sized rooms.
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What type of refrigerant does it use?
Answer: The KNUDB121A utilizes R-32 refrigerant, known for its lower global warming potential compared to traditional refrigerants, contributing to more environmentally friendly operation.
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What are its airflow and sound levels?
Answer: The unit features a brushless direct current motor, reducing electrical and mechanical sound while providing powerful air movement. It can operate at volumes as low as 32 dB, ensuring quiet operation.
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What is its energy efficiency rating?
Answer: The KNUDB121A boasts a SEER2 rating of 21.5, indicating high energy efficiency and potential cost savings on energy bills.
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What is the recommended operating voltage?
Answer: The unit operates within a voltage range of 187V to 253V, compatible with standard residential electrical systems.
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What are its dimensions and weight?
Answer: The indoor unit measures approximately 24-13/32 inches in width and depth, and 9-19/64 inches in height. It weighs about 28.4 lbs, with the grille adding approximately 8.6 lbs.
Pros
1. High Performance
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Cooling Capacity: 12,000 BTU/hr
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Heating Capacity: 13,800 BTU/hr
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Refrigerant: R-32, known for improved energy efficiency and reduced environmental impact
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SEER2 Rating: 22.0, indicating high energy efficiency
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EER2 Rating: 12.0
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HSPF2 Rating: 10.0
2. Quiet Operation
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Sound Levels: Operates as low as 32 dB(A), ensuring minimal noise disruption
3. Advanced Airflow Features
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Swing Mode: Automatically adjusts airflow direction for optimal comfort
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Swirl Wind Mode: Provides uniform air distribution throughout the room
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Jet Cool Mode: Rapid cooling mode that temporarily adjusts set point and fan speed for quick cooling
4. Enhanced Connectivity
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Wiring: Requires a 5-conductor cable instead of the standard 4-conductor, improving communication reliability and enabling a new leak detection feature
5. Compact and Aesthetic Design
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Dimensions: Approximately 8.5 inches in height, with a 22.5-inch square grille
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Installation: Recessed installation with a low-profile grille for a sleek appearance
Cons
1. Installation Requirements
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Professional Installation: Requires licensed HVAC professionals for proper setup
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Grille Sold Separately: Grille model PT-QAGW0 is not included and must be purchased separately
2. No Built-in Voice Control
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Limited Smart Integration: While compatible with the LG ThinQ app, it does not support direct voice control via Alexa or Google Assistant
Conclusion
The LG KNUDB121A is a high-performance ceiling cassette unit ideal for both residential and commercial applications. Its efficient heating and cooling capabilities, coupled with advanced features like quiet operation and smart connectivity, make it a standout choice for those seeking comfort and energy savings. However, potential buyers should consider the installation requirements and the need for a separate grille.
