Mitsubishi MFZ-KX09NL & SUZ-AA09NL 9,000 BTU 21.6 SEER2 Floor-Mounted Heat Pump System - R454B - MFZKX09NL/SUZAA09NL
The Mitsubishi MFZ-KX09NL & SUZ-AA09NL is a high-efficiency 9,000 BTU floor-mounted heat pump system designed for compact residential or small commercial spaces. Equipped with an INVERTER-driven compressor, it delivers precise temperature control and energy savings. The MFZ-KX09NL indoor unit offers flexible floor or recessed wall mounting, while the SUZ-AA09NL outdoor unit ensures reliable performance with features like Blue Fin anti-corrosion coating and Pulse Amplitude Modulation technology.
Perfect for single-zone applications, this system provides whisper-quiet operation, customizable airflow, and advanced control options, including Wi-Fi-enabled Comfort app integration. It’s ideal for efficient, year-round comfort in spaces up to ~350 sq ft.
Features
INVERTER-Driven Compressor
Ensures 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.
Specifications
Cooling Capacity: 9,000 BTU (3,800–9,000 BTU range)
Heating Capacity: 12,000 BTU (5,200–13,600 BTU range)
EER2: 12.6
HSPF2: 12.3
COP at 47°F: 4.3
COP at 17°F: 3.3
Voltage: 208/230V, 1-Phase, 60Hz
Airflow Rate: Cooling/Heating – 1,229 CFM
Piping: Gas – 3/8 in. / Liquid – 1/4 in.
Included Components
Indoor Unit: MFZ-KX09NL
Outdoor Unit: SUZ-AA09NL
Accessories: Hand-held Remote Controller
Optional Accessories
Indoor Unit: Wi-Fi Interface, Wired Remote Controller, Air Cleaning Filter, Base Heater
Outdoor Unit: Air Outlet Guide, Drain Socket, Wall-Mounting Bracket
Ideal For:
Homeowners and small businesses seeking a compact, quiet, and energy-efficient floor-mounted heat pump system for single-zone comfort with advanced controls and durable performance in small spaces.
What Our Experts Think
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A great solution for smaller rooms—bedrooms, offices, dens, studios, or bonus spaces up to ~350 sq ft.
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Floor-mounted design is perfect when wall space is limited or when low-level airflow improves comfort and circulation.
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The 21.6 SEER2 efficiency rating makes this one of the more energy-efficient floor-mounted systems in its class.
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Mitsubishi’s INVERTER-driven compressor provides quiet, highly precise temperature regulation.
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Blue Fin–coated coils on the outdoor unit improve long-term durability, especially in humid or coastal environments.
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Works with optional wired/wireless remotes and smart controls for better customization.
Q&A
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Q: What size room can this 9,000 BTU system handle?
A: Generally up to about 350 sq ft depending on insulation quality and climate conditions.
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Q: Is floor mounting better than a wall-mounted unit?
A: It can be—floor mounting helps distribute heat more evenly in rooms with limited wall space or high ceilings.
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Q: Does this system both heat and cool?
A: Yes, it’s a full heat pump system designed for efficient year-round heating and cooling.
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Q: Is it quiet?
A: Very quiet. Mitsubishi indoor heads are known for whisper-level sound output, ideal for bedrooms or offices.
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Q: Can it integrate with a third-party thermostat?
A: Yes, with the appropriate Mitsubishi thermostat adapter (sold separately).
Maintenance Tips
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Clean or replace indoor air filters every 4–6 weeks for peak efficiency.
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Keep objects and furniture clear of the airflow path to ensure even air distribution.
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Rinse the outdoor unit’s coil seasonally to remove dirt or salt buildup.
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Verify the condensate drain remains clear to prevent moisture issues.
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Schedule annual professional service to maintain optimal performance, efficiency, and longevity.
