Mitsubishi Electric 30,000 BTU 21 SEER2 Dual Zone Wall Mounted Ductless Mini Split Heat Pump System 9+15 R454B Refrigerant | MXZ-4D30NL-MSZ-GX09NL-MSZ-GX15NL

Product Summary

This Mitsubishi Electric ductless multi-zone system is built around the MXZ-4D30NL heat pump outdoor unit with 28,600 BTU/h rated cooling performance and an inverter-driven twin rotary compressor. It uses R454B refrigerant and is designed for multi-room comfort where zoning, compact equipment placement, and precise capacity control matter. This configuration includes 1 × MSZ-GX09NL wall-mounted indoor unit (9,000 BTU class); 1 × MSZ-GX15NL wall-mounted indoor unit (14,000 BTU class). The outdoor unit supports a minimum of 2 and up to 4 indoor zones, helping you match capacity to the spaces you condition.

On the performance side, MXZ-4D30NL delivers up to 36,000 BTU/h maximum heating at 47°F with 28,600 BTU/h rated heating output, supporting dependable heat pump operation through shoulder seasons. For non-ducted applications, published efficiency reaches 21 SEER2 and 10 HSPF2, aligning with energy-focused designs. Outdoor airflow is rated at 2,119 CFM cooling and 2,228 CFM heating to move heat effectively through the coil. Reverse-cycle defrost helps maintain heating operation when outdoor conditions demand it, and the outdoor coil includes Blue Fin anti-corrosion treatment.

System control is designed around zone-by-zone operation, giving each indoor unit its own setpoint and fan speed while the outdoor inverter modulates to demand. Each MSZ-GX wall-mounted indoor unit uses a DC fan motor and supports multiple airflow steps for stable temperature control. This multi-zone architecture helps reduce short cycling compared with fixed-speed equipment by matching compressor output to real-time load. When multiple zones call at once, the outdoor unit prioritizes capacity delivery while maintaining safe operating limits. Because connected capacity can be configured up to 36,000 BTU/h, the system supports flexible room-by-room design as your layout or usage changes.

For comfort, the MSZ-GX indoor units provide variable airflow and low sound operation that supports bedrooms, offices, and open living spaces. GX indoor sound pressure levels vary by fan speed, with published low values starting at 19 dB(A) on select capacities, and higher airflow steps available when faster pull-down is needed. Outdoor sound pressure is listed at 53 dB(A) cooling and 56 dB(A) heating to help meet neighborhood or patio-adjacent installs. Using multiple zones also helps avoid over-conditioning by delivering comfort only where it is requested.

This system fits residential and light commercial applications that need multiple zones from a single outdoor unit, such as multi-bedroom homes, additions, or multi-family units. The outdoor unit is rated for a wide operating range, including cooling intake air temperatures up to 115°F and down to 14°F. With support for total piping lengths up to 230 ft and farthest runs up to 82 ft, installers can route refrigerant lines to match real-world building constraints. Four-zone capability enables mixing different room sizes by selecting indoor unit capacities that match loads without tying every room to the same thermostat. That makes it a strong choice for renovations where adding ductwork is difficult or where independent comfort control is a priority.

Reliability features include compressor thermal protection, fan motor protection, and high-pressure protection designed to keep operation stable across changing conditions. The Blue Fin coated outdoor heat exchanger is intended to improve coil durability in challenging environments, including coastal or industrial areas. Indoor units feature Dual Barrier Coating to reduce the collection of contaminants on internal surfaces, supporting easier maintenance and more consistent airflow over time. R454B refrigerant supports modern system design while maintaining the performance and control expected from Mitsubishi inverter technology. Optional accessories like a base pan heater can be applied where winter conditions create additional defrost drainage needs.

If you want multi-room ductless comfort with efficient part-load operation, the MXZ-4D30NL platform delivers a practical balance of capacity, zoning flexibility, and compact equipment footprint. Pairing it with MSZ-GX wall-mounted indoor units provides room-by-room control, multiple airflow steps, and quiet day-to-day performance. Use it to condition two to four zones from one outdoor unit while keeping installation adaptable through long piping allowances and mixed room capacities. For homeowners, builders, and HVAC pros sourcing online, this bundle offers a straightforward way to spec Mitsubishi multi-zone performance for new projects or retrofits. Select the indoor unit mix that matches your rooms, and you get a single integrated heat pump system ready for whole-home zoned comfort.

Key Features

• Multi-zone outdoor platform: Supports 2–4 indoor zones with connected capacity up to 36,000 BTU/h for multi-room layouts.
• Inverter twin rotary compressor: Modulates capacity to match zone demand for stable temperatures and reduced cycling under part-load conditions.
• R454B refrigerant system: Uses R454B across the outdoor and GX indoor units for modern ductless heat pump designs.
• Blue Fin heat exchanger coating: Applies an anti-corrosion treatment to help protect the outdoor coil in coastal or industrial conditions.
• Reverse-cycle defrost: Helps maintain heating performance in cold weather by periodically clearing frost from the outdoor coil.
• Wall-mounted GX indoor units: Includes DC fan motors and multiple airflow steps to balance quiet operation with fast comfort recovery.
• Included indoor unit mix: Bundle ships with 1× MSZ-GX09NL, 1× MSZ-GX15NL for zone-by-zone comfort.