LG 42,000 BTU Multi F Single Zone Ceiling Cassette Mini Split Air Handler - R32| 230V

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By

LG

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Model

KNSCB421A

ID

235778

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Product Features
  • 42,000 BTU Indoor Ceiling Air Handler
  • Perfect for Rooms Up to 1,800–2,200 sq ft
  • Flush-Mount 4-Way Ceiling Cassette Design
  • Uses 3/8" x 5/8" Line Set
  • Wi-Fi Remote Control with LG ThinQ™ app
  • 7 Years Parts Warranty with Online Registration

LG 42,000 BTU Multi F Single Zone Ceiling Cassette Mini Split Air Handler – R32 | 230V

This four-way ceiling cassette air handler is designed to deliver powerful, even airflow for large spaces up to approximately 1,800–2,200 sq ft. Ideal for open-concept living areas, offices, and commercial environments, it offers discreet ceiling installation while providing consistent comfort and wide air distribution throughout the space.

Key Features

  • Coverage for Spaces Up to 2,200 Sq. Ft.: Provides efficient heating and cooling for residential and commercial spaces up to 2,200 square feet, depending on insulation, room layout, and climate conditions.
  • High-Efficiency Performance: Achieves up to 21+ SEER2 efficiency when paired with compatible LG Multi F outdoor units, helping optimize energy consumption and maintain indoor comfort.
  • ENERGY STAR® Certification: All models are ENERGY STAR® and ENERGY STAR® Cold Climate certified, potentially helping eligible customers qualify for available rebates and incentives.
  • Compact 2x2 Ceiling Cassette Design: Installs flush with the ceiling for a discreet, space-saving appearance that complements residential and commercial interiors.
  • 360° Air Distribution: Distributes conditioned air in all directions to promote balanced airflow and consistent indoor comfort.
  • Quiet Indoor Operation: Delivers comfortable heating and cooling with low-noise performance suitable for offices, bedrooms, and living spaces.
  • Built-In Wi-Fi and Smart Control Compatibility: Enables convenient remote temperature adjustments and system management through compatible smart control features.
  • Wide Operating Temperature Range: Provides reliable heating and cooling across varying outdoor temperatures, supporting year-round comfort in mild to cold climates.

Feature Highlights

Efficiency (SEER2)
When paired with an LG Multi F outdoor condenser, this system can achieve high SEER2 ratings that help reduce overall energy consumption and operating costs. Inverter-driven technology continuously adjusts output based on demand, improving efficiency while maintaining stable indoor temperatures and enhanced comfort.

Quiet Operation
Engineered for low sound levels, this ceiling cassette operates quietly even at higher capacities, making it suitable for both residential and commercial environments. Its recessed ceiling installation helps reduce perceived noise, creating a more comfortable and distraction-free indoor space.

Right-Sized Power
With a 42,000 BTU capacity, this unit is ideal for large open spaces that require strong, consistent airflow. The four-way air distribution system ensures balanced temperature control across the entire area, helping eliminate hot and cold spots while maintaining steady comfort. Ceiling cassette systems are especially effective in wide, open layouts.

What's Included

  • Indoor ceiling cassette air handler — 42,000 BTU capacity
  • Compatible with LG Multi F outdoor condenser (sold separately)
  • Wireless remote control
  • Installation manual

Recommended Accessories

  • Refrigerant line set
  • Wall bracket or condenser pad
  • Drain hose and insulation kit

Warranty

LG products include a 10-year warranty with the requirement that installation is completed by a licensed contractor and that the product is registered within 60 days of installation at https://lg-dfs-warranty.com/.

More Information
LG 42,000 BTU Multi F Single Zone Ceiling Cassette Mini Split Air Handler - R32| 230V
FeatureSpec
SKUKNSCB421A
Weight (in lbs)74.3
Brand/ManufacturerLG
UPC195174090381
ControllerWireless Included
Cooling BTU42,000 BTU
Heating BTU48,000 BTU
Maximum CFM1130 Hi / 953 Med / 812 Lo CFM (Airflow)
Decibel Level (dBA)41-46 dBA
RefrigerantR32
Liquid Line 3/8"
Suction Line 5/8"
Electrical208-230V | 1Phase | 60Hz
BTU/Tonnage42,000 BTU/3.5 Ton
Mini Split TypeCeiling Cassette
Zone CompatibilityMulti Zone
Height14.17"
Width36.1"
Depth36.3"
Warranty10 Year Compressor / 7 Years Parts Warranty with Online Registration
Resources You will need AdobeA® AcrobatA® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
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