Mitsubishi GS 9,000 BTU 28.4 SEER2 Wall Mounted Heat Pump System - R410A - MSZ-GS09NA-U1 / MUZ-GS09NA-U1
Mitsubishi GS 9,000 BTU 28.4 SEER2 M-Series Wall-Mounted Single Zone Heat Pump System. This is an extremely efficient heating and cooling option for a small-sized room up to 400 sq ft.
Features
Double-action filtration system combining a unique nano-platinum filter with electrostatic anti-allergy enzyme filter
Dual Barrier Coating applied to the heat exchanger
Multiple airflow options and double vanes for improved and more comfortable airflow patterns
Quiet operation
Dehumidification mode for improved comfort
Simple Timer
WiFi enabled (requires Kumo Cloud or Aidoo wifi Adapter)
Hot-Start Technology: no cold air rush at equipment startup or when restarting after Defrost Cycle
The outdoor unit powers the indoor unit, and should a power outage occur, the system is automatically restarted when power returns
Blue Fin anti-corrosion treatment applied to the outdoor unit heat exchanger for increased coil protection and longer life
What Our Experts Think
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Highly efficient 9,000 BTU system with an impressive 28.4 SEER2 for maximum energy savings.
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Ideal for small rooms up to 400 sq ft, delivering fast and consistent heating and cooling.
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Quiet, compact wall-mounted design fits well in bedrooms, offices, and studio spaces.
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Reliable R410A heat-pump performance ensures year-round comfort.
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Strong value for homeowners seeking top efficiency in a single-zone setup.
Q&A
Q: What room size is this system best for?
A: Small rooms up to about 400 sq ft.
Q: How efficient is the unit?
A: With a 28.4 SEER2 rating, it’s one of the most efficient in its category.
Q: Can it heat and cool?
A: Yes, it provides both heating and cooling as a full heat-pump system.
Q: Is it quiet?
A: Yes, designed for low-noise operation suitable for sleeping and working areas.
Maintenance Tips
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Clean the wall-unit filters every 4–6 weeks to maintain airflow and efficiency.
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Dust the front panel and louvers regularly to prevent buildup.
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Keep the outdoor unit clear of leaves, debris, and vegetation.
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Schedule annual professional servicing to ensure proper refrigerant charge and performance.
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Watch for reduced airflow or unusual noise as early signs of needed maintenance.
