Mitsubishi MUZ-WX18NL 18,000 BTU Heat Pump Outdoor Unit - R454B - MUZWX18NL
The Mitsubishi MUZ‑WX18NL is a high-efficiency, single-zone outdoor heat pump condenser engineered to pair with WX Series indoor units for year-round comfort in spaces up to ~750 sq ft.
Compact, Space-Saving Design
Measuring approximately 31″ W × 21″ H × 11″ D, this sleek outdoor unit fits tight exterior spaces and includes a built-in base pan heater to ensure performance in cold climates.
High-Efficiency Performance
Delivers up to 18.0 SEER2 cooling and 8.5 HSPF2 heating with inverter-driven compressor technology for stable temperatures, reduced energy usage, and quiet operation at just 51 dB(A).
Cold-Climate Ready
Equipped with Hyper-Heating INVERTER® (H2i®) technology, it provides reliable heating down to -13°F, making it ideal for areas with harsh winters.
Smart System Integration
Designed for compatibility with Mitsubishi's advanced control systems, including app-based remote access, wired controllers, and third-party integration for flexible zone control.
Durable & Weather-Resistant
Features Blue Fin anti-corrosion coating and rugged construction for long-term durability in all weather conditions. Covered by a 10-year parts warranty when installed and registered by a licensed contractor.
Perfect for homeowners seeking quiet, efficient, year-round comfort with reliable cold-weather heating and modern connectivity options.
What Our Experts Think
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High-performance 18,000 BTU heat pump outdoor unit for Mitsubishi multi-zone systems.
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Provides efficient heating and cooling for medium to large spaces when paired with compatible indoor units.
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R454B-ready refrigerant ensures energy efficiency and compliance with modern environmental standards.
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Durable, weather-resistant construction designed for long-term outdoor operation.
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Ideal for homeowners and businesses seeking reliable climate control with multi-zone flexibility.
Q&A
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Q: Does this include indoor units?
A: No—this is the outdoor unit only. Must be paired with compatible Mitsubishi indoor units.
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Q: What is the coverage area?
A: Supports multiple indoor units, typically suitable for spaces up to 800–1,000 sq. ft., depending on insulation.
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Q: Is it energy efficient?
A: Yes, inverter-driven technology optimizes energy use for both heating and cooling.
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Q: Can it handle multi-zone setups?
A: Yes, designed specifically for Mitsubishi Smart-Multi multi-zone systems.
Maintenance Tips
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Keep the unit free of debris, leaves, and snow to ensure proper airflow.
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Schedule annual professional maintenance to check refrigerant levels and electrical connections.
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Clean the condenser coils periodically for optimal performance.
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Inspect mounting brackets and hardware to maintain stable installation.
