Description
Overview
This bundled LG Multi F ductless multi-zone heat pump system pairs one KUMXB361A outdoor unit with 3 wall-mounted high efficiency indoor units to create a single refrigerant-based zoning platform. The outdoor unit is rated 32,800 Btu/h cooling and 36,000 Btu/h heating, with capacity modulation across the connected zones. This SKU includes 1 × KNUAB091A (9,000 Btu/h cooling), 2 × KNUAB121A (12,000 Btu/h cooling). Connected indoor nominal capacity totals 33,000 Btu/h cooling and 38,100 Btu/h heating, supporting multi-room comfort coverage. All components operate on 208-230V, 60Hz, 1Ø power and use R32 refrigerant with electronic expansion valve control.
Performance
The KUMXB361A outdoor unit delivers a cooling capacity range of 8,400 to 38,400 Btu/h and a heating capacity range of 10,080 to 41,600 Btu/h under rated conditions. For cold-weather demand, maximum heating capacity is listed at 28,400 Btu/h at 17°F, 25,200 Btu/h at 5°F, and 20,800 Btu/h at -4°F. Compressor operation is handled by a Twin rotary (1) inverter-driven compressor and an Axial, brushless digitally controlled/direct (1) fan rated up to 2,295 CFM. The outdoor heat exchanger includes Gold Fin™ coating to support coil durability in exterior exposures. Indoor air delivery is provided by cross-flow fans, with a combined maximum airflow up to 832 CFM across the installed zones.
Smart Features
Each indoor unit includes Built-in Wi-Fi via Smart ThinQ app for app-based command and scheduling in addition to the included wireless remote controller. Control features include auto operation, auto restart, group control, and a 24-hour on/off timer to support multi-room usage patterns. Refrigerant metering is managed through EEV control at both the outdoor and indoor units to support zone-by-zone capacity distribution. The outdoor unit lists an integrated central control connection and supports controller options such as monitoring tools for commissioning and diagnostics. Sensing is handled by a thermistor temperature sensor, and indoor units include an R32 leak detection sensor as part of the unit feature set.
Comfort & Noise
Comfort delivery is ductless and room-direct, using wall-mounted air discharge with left/right and up/down auto swing for throw and mixing. 1 wall-mounted indoor unit (KNUAB091A) rated 9,000 Btu/h cooling and 10,900 Btu/h heating each; 2 wall-mounted indoor units (KNUAB121A) rated 12,000 Btu/h cooling and 13,600 Btu/h heating each and includes jet cool/jet heat and sleep mode for setpoint transition behavior. KNUAB091A sound pressure is 36 / 32 / 27 dB(A) (H/M/L) KNUAB121A sound pressure is 38 / 34 / 29 dB(A) (H/M/L). Outdoor sound pressure is listed at 51 / 54 dB(A) in cooling/heating mode, supporting placement planning near occupied areas. Moisture control is supported through indoor dehumidification performance ratings that vary by indoor size class. Self-cleaning indoor coil functionality is listed to support continued airflow and heat transfer across the operating season.
Use Case Fit
This configuration is designed for multi-room residential applications, light commercial suites, and multi-family units that benefit from true zoning without ductwork. The outdoor platform supports a minimum of 2 and a maximum of 4 connectable indoor units, and this SKU populates 3 active zones. Outdoor operating range is listed from 14 to 118°F DB in cooling and -4 to +64°F WB in heating, aligning to broad regional climate coverage. Low ambient cooling is listed down to 14°F, and down to -4°F when used with an optional wind baffle kit. Piping architecture supports four ports with 1/4 in x 4 liquid and 3/8 in x 4 vapor connections, and maximum total equivalent piping of 246.1 ft. Elevation allowances are listed at 49.2 ft between outdoor and indoor units and 24.6 ft between indoor units.
Value & Reliability
Serviceability features include self diagnosis, defrost/deicing logic, soft start behavior, and a listed restart delay of three minutes to protect compressor operation. Filtration is standardized across the indoor units with a Washable pre-filter plus 3M Micro Dust filter set to manage particulate loading. Indoor fan motors are brushless digitally controlled, and the outdoor fan is also brushless digitally controlled/direct for stable airflow control. Electrical operating voltage is listed as acceptable from 187V to 253V, supporting real-world supply variability on 208/230V systems. Condensate management uses a drain connection sized 0.84 in OD / 0.63 in ID at each indoor unit for consistent installation practice across zones. For logistics planning, combined net weight is 199.19 lb and combined shipping weight is 224.60 lb across the included cartons.
Summary Wrap-Up
As a single packaged bundle, this LG Multi F system combines an inverter-driven outdoor heat pump with multiple wall-mounted indoor zones for room-level control. The KUMXB361A provides R32 refrigerant distribution through EEV control and four dedicated line connections, while the indoor units handle air delivery, filtration, and local comfort. Built-in Wi‑Fi control, included remotes, and group-control features support both direct-to-consumer use and contractor-installed projects. Wide operating ranges and low ambient cooling capability improve application flexibility across mixed climates and shoulder seasons. This SKU’s zone mix is optimized around the included indoor capacities to support multi-room layouts without adding ductwork. For wholesale procurement, the bundle format streamlines ordering by tying the outdoor platform and the exact indoor count into one SKU.
Key Features
- R32 refrigerant circuit: Uses R32 refrigerant with EEV refrigerant control at the outdoor and indoor units for multi-zone metering.
- Zone capacity mix: Includes 1 × KNUAB091A (9,000 Btu/h cooling), 2 × KNUAB121A (12,000 Btu/h cooling), enabling a 3-zone ductless layout with a connected nominal total of 33,000 Btu/h cooling.
- Inverter compressor platform: Twin rotary inverter compressor with soft start, auto restart, and a three-minute restart delay for controlled cycling.
- Low ambient cooling range: Listed cooling operation down to 14°F, and down to -4°F with an optional wind baffle kit for shoulder-season cooling needs.
- Air delivery and noise data: Cross-flow indoor fans provide up to 832 CFM combined max airflow, with indoor sound pressure ratings published by size class.
- Filter and coil maintenance features: Washable pre-filter plus 3M Micro Dust filtration and a listed self-cleaning indoor coil function.
- Piping and elevation allowances: Four-port connections (1/4 in x 4 liquid, 3/8 in x 4 vapor) with 246.1 ft maximum total piping and up to 49.2 ft elevation between ODU and IDU.
