Mitsubishi MFZ-KX12NL & SUZ-AA12NL 12,000 BTU 19.6 SEER2 Floor Mounted Heat Pump System - R454B - MFZKX12NL/SUZAA12NL
The Mitsubishi MFZ-KX12NL & SUZ-AA12NL is a high-efficiency 12,000 BTU floor-mounted heat pump system designed for compact residential or small commercial spaces. Featuring an INVERTER-driven compressor, it provides precise temperature control and energy savings. The MFZ-KX12NL indoor unit offers flexible floor or recessed wall mounting, while the SUZ-AA12NL outdoor unit ensures reliable performance with Blue Fin anti-corrosion coating and Pulse Amplitude Modulation technology.
Ideal for single-zone applications, this system delivers quiet operation, customizable airflow, and advanced control options, including Wi-Fi-enabled Comfort app integration. It’s perfect for year-round comfort in spaces up to ~500 sq ft.
Features
INVERTER-Driven Compressor
Delivers precise capacity control for consistent temperatures and reduced energy consumption.
Flexible Installation
Mounts on the floor, 5" above the floor, or recessed into a wall, ideal for small or challenging spaces.
Quiet Operation
Both indoor and outdoor units operate at levels comparable to a typical conversation, with whisper-quiet indoor performance.
Blue Fin Anti-Corrosion Coating
Protects the outdoor unit’s heat exchanger from corrosion in coastal or industrial environments.
Energy Efficient
Features Pulse Amplitude Modulation and Joint Lap DC Motor for enhanced efficiency and reliability.
Nano Platinum Filter
Incorporates nanometer-sized platinum-ceramic particles to reduce certain nonliving particles and deodorize air.
Econo Cool Mode
Automatically adjusts airflow and slightly increases set temperature for energy savings while maintaining comfort.
Powerful Mode
Temporarily adjusts set point and fan speed to quickly reach desired temperature.
Advanced Control Options
Compatible with the Comfort app, hand-held remote (included), third-party interfaces, and wired/wireless controllers.
Hot-Start Technology
Prevents cold air blasts by activating the fan only when the heat exchanger is warm.
High-Performance Grooved Piping
Enhances heat exchange efficiency for improved performance.
Multi-Flow Vane
Promotes faster heating with optimized airflow distribution.
Up and Down Swing-Mode
Moves air up and down like an oscillating fan using horizontal vanes for even distribution.
What Our Experts Think
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Excellent choice for small rooms, apartments, offices, and converted spaces up to ~500 sq ft.
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Floor-mounted design is ideal when wall space is limited or when low-mounted airflow improves comfort (e.g., drafty rooms or spaces with tall ceilings).
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INVERTER-driven compressor provides smooth, efficient temperature control with very low operating noise.
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Blue Fin–coated outdoor coil adds long-term durability in coastal, humid, or high-pollution environments.
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R-454B refrigerant gives this system a lower environmental impact compared to older refrigerants.
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Smart accessory compatibility (wired/wireless remotes, app control with add-ons) increases customization and convenience.
Q&A
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Q: How large of a space can this 12k BTU system handle?
A: Typically up to about 500 sq ft depending on insulation, layout, and climate.
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Q: Is the floor-mounted design more efficient?
A: It can be—floor-level return and discharge provide consistent comfort in rooms where wall placement isn't ideal.
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Q: Can it provide year-round heating and cooling?
A: Yes, this is a full heat pump system built for both cooling and heating operation.
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Q: Is the system quiet?
A: Very. Mitsubishi’s INVERTER compressor and multi-speed fan design keep both indoor and outdoor noise levels low.
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Q: Does this system work with third-party thermostats?
A: Yes—with the appropriate Mitsubishi interface (sold separately).
Maintenance Tips
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Wash or replace air filters every 4–6 weeks to maintain airflow and efficiency.
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Keep furniture clear of the indoor unit so airflow isn’t blocked.
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Inspect and clean the outdoor coil seasonally—especially in coastal climates.
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Ensure the condensate drain remains unobstructed to prevent water buildup.
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Schedule annual professional maintenance to check refrigerant levels, electronics, and system performance.
