LG 32.8K BTU Cooling 21.5 SEER2 Four Zone Wall Mount Mini Split Package with 7k + 9k + 15k + 15k Indoor Units
This is LG’s Multi F line; model identifiers include KUMXB361A for the outdoor unit, and KNUAB091A + KNUAB121A for the indoor wall-mount units. Build+2device.report+2
It’s a 4-zone wall-mount mini-split heat pump / cooling system which means one outdoor condenser supports up to four indoor wall-mount heads. The four indoor units in the configuration are:
-
One 9,000 BTU unit device.report
-
Three 12,000 BTU units device.report+1
Total rated cooling capacity is ~ 32,800 BTU; rated SEER2 ~ 21.5. device.report
Heating capacity (i.e. in heating mode) is also strong: rated around 36,000 BTU maximum, though that will depend on ambient conditions. device.report
⚙️ Key Features & Performance Highlights
Here are performance / features worth noting:
| Feature | Detail |
|---|---|
| Refrigerant / Efficiency | Uses R-32 refrigerant. Good efficiency (21.5 SEER2) for cooling. device.report |
| Operating Range | Cooling works down to about 14°F DB outside. Heating operates in colder temps, with performance specified at 5°F and −4°F (with optional wind baffle) depending on model. device.report |
| Electrical Requirements | 208-230 V single phase, 60 Hz. Some fairly high current draw (see below) for outdoor unit. device.report |
| Piping, Distance Limits | There are limits on how far indoor units can be from the outdoor unit, how much vertical rise/drop between units, etc. Additional refrigerant needed if piping lengths exceed the factory lengths. device.report+1 |
| Noise | Sound pressure levels specified for both cool & heat modes. The indoor units are fairly quiet. Outdoor unit noise depends on load, etc. device.report |
| Control Features | Typical LG features: inverter compressor, “soft start”, self-diagnosis, auto restart, possibly remote / WiFi control etc. Some built-in protections and “low ambient” modes. device.report |
⚠️ Limitations / Things to Check
As with any complex mini-split system, there are things to watch out for:
-
Real-world capacity vs rated: At very high outside temperatures, long pipe runs, or large vertical rises, the cooling/heating output won’t stay at rated. Proper sizing & installation are critical.
-
Cold climate heating performance: If you're in a cold place (e.g. Vermont winters), check whether the heating capacity at low ambient temps is sufficient, and whether there’s a backup heat source if needed. At very low temps, performance drops off. device.report
-
Electrical supply & breaker sizing: You’ll need adequate power, proper breaker size, wiring gauge etc. The Mounting and wiring must follow LG’s specs. device.report
-
Installation complexity: With four indoor units, you’ll need more planning: routing refrigerant lines, insulating, locating indoor heads, condensate drains, communication wiring, etc. It’s likely more expensive to install than a single-zone. Also, matching lengths and addressing units properly.
-
Cost: Higher upfront cost (equipment + installation), though the efficiency may help offset that over time.
-
Maintenance: Multiple indoor units means more filters to clean, more parts, more potential for issues. But generally LG has good support.
📊 Some Performance Numbers
Here are more detailed numbers from the spec sheet: device.report
| Parameter | Value |
|---|---|
| Rated Cooling Capacity | 32,800 BTU/h device.report |
| Min-Rated-Max Cooling | ~ 8,400 → 32,800 → 38,400 BTU/h (meaning under low load it can modulate down) device.report |
| Rated Heating Capacity | ~ 36,000 BTU/h peak device.report |
| Max Heating at 17°F / 5°F / −4°F | ~ 28,400 BTU/h @ 17°F; ~25,200 BTU/h @ 5°F; lower still at −4°F with optional wind baffle for better performance. device.report |
| Max Total Piping Length / Elevation | Total piping up to ~ 246.1 ft in some configurations; outdoor to indoor runs and between indoor units have maximum vertical distance limits, etc. device.report |
Choose options