LG 18,000 BTU Ductless Mini Split Heat Pump Multizone Condenser R32 Refrigerant | KUMXB181A

The LG Viero KUMXB181A is a high-performance, dual-zone mini-split outdoor unit delivering 18,000 BTU cooling and 22,000 BTU heating capacity, perfect for a variety of residential and light commercial applications. Part of LG’s Viero Multi‑F line, this model boasts a front‑mount heat pump with R‑32 refrigerant, rated at 22.5 SEER2 and 9.8 HSPF2, ensuring outstanding energy efficiency and compliance with today’s DOE standards. Designed for mounting on a pad or bracket outdoors, it connects to up to two compatible indoor units, enabling flexible zoning and tailored comfort.

Performance

This outdoor condenser employs LG’s inverter-equipped twin rotary compressor and electronic expansion valve, enabling variable-speed operation that finely tunes refrigerant flow and maintains consistent temperatures. With an EER2 of 13.5, it delivers cost-effective operation in cooling mode. The coil is treated with LG’s Gold Fin anti-corrosion coating, enhancing durability in coastal climates or sub-tropical environments like South Florida. It supports low‑ambient operation—cooling down to 14 °F and heating down to −4 °F—and includes auto-defrost, ideal for mild winter climates or seasonal usage.

Smart Features

The KUMXB181A supports integrated central control, compatible with LG ThinQ smart thermostats and third-party zoning systems, enabling remote management via Wi-Fi. A 5-conductor communication cable enables advanced internal leak detection, a new capability for R‑32 units. With dual-zone control, professionals can configure up to two indoor units (wall-mounted, ducted, ceiling cassette, console, etc.) independently, offering tailored comfort across bedrooms, offices, or amenity spaces.

Comfort & Noise

Noise control is a key advantage. The brushless DC fan motor and twin rotary compressor keep sound levels to a maximum of 54 dBA, significantly quieter than traditional HVAC options. Efficient airflow delivery and inverter modulation minimize temperature swings, reduce drafts, and prioritize steady comfort control. The self-diagnosis feature simplifies maintenance and optimizes performance.

Use‑Case Fit

Ideal for single‑family homes, multi‑family units, light commercial spaces (small offices, retail), and property-managed units, the KUMXB181A thrives in warm-to-temperate climates like Miami. Its two-zone capability allows targeted control in occupied areas—reducing energy waste in unoccupied zones. The use of low‑GWP R‑32 refrigerant aligns with regional regulations, energy codes, and rebate programs.

Value & Reliability

Built to last, this unit features robust construction, Gold Fin protection, and an inverter compressor backed by LG’s service network. With a 7‑year compressor warranty and 5‑year parts coverage, it meets professional expectations for uptime and longevity. Its Electronic Expansion Valve and brushless fan deliver reduced mechanical stress, translating to long-term reliability and lower operating costs.

Summary Wrap‑Up

For contractors, D2C customers, and property managers, the LG Viero KUMXB181A provides a smart, efficient, and reliable dual-zone solution featuring modern controls, energy-efficient heat pump operation, and quiet performance. It’s optimized for environments like South Florida and offers easy zoning, premium comfort, and future-ready refrigerant compatibility—all with LG’s trusted reputation behind it.

Key Features

• 22.5 SEER2 / 9.8 HSPF2 Efficiency: Delivers premium energy savings in both cooling and heating modes, reducing utility expenses.

• 18,000 BTU Cooling & 22,000 BTU Heating Capacities: Dual‑zone flexibility supports both primary and secondary indoor units for tailored comfort.

• Inverter Twin Rotary Compressor: Optimizes refrigerant flow with variable-speed operation for precise temperature control.

• Gold Fin Coil Protection: Corrosion-resistant coating enhances durability in coastal and humid environments.

• Low‑Ambient Operation (14 °F to −4 °F): Maintains reliable performance in cooler conditions for seasonal climates.

• Quiet 54 dBA Design: Brushless DC fan and compressor minimize noise, ideal for residential and office settings.

• Smart Connectivity & Leak Detection: Supports ThinQ smart control, remote thermostat integration, and built-in refrigerant leak detection via 5‑wire cable.