Mitsubishi Electric 9,000 BTU 20.9 SEER2 1 Way Ceiling Cassette Heat Pump Mini Split System R454B Refrigerant | SZ-MLZ09

Mitsubishi Electric

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Mitsubishi Electric 9,000 BTU 20.9 SEER2 1 Way Ceiling Cassette Heat Pump Mini Split System R454B Refrigerant, model SZ-MLZ09
Condition:
New
Width:
31.50 (in)
Height:
21.63 (in)
Depth:
11.25 (in)

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Overview

Mitsubishi Electric 9,000 BTU 20.9 SEER2 1 Way Ceiling Cassette Heat Pump Mini Split System R454B Refrigerant | SZ-MLZ09

Mitsubishi Electric 9,000 BTU 20.9 SEER2 1 Way Ceiling Cassette Heat Pump Mini Split System R454B Refrigerant, model SZ-MLZ09
Product details

Description

Overview

The Mitsubishi Electric MLZ-KX09NL-SUZ-AA09NL is a single-zone ceiling-cassette heat pump system designed for efficient year-round comfort. This bundled system delivers 9,000 BTU of cooling and up to 12,000 BTU of heating capacity using R454B refrigerant. The low-profile ceiling-mounted indoor unit fits between standard 16-inch joists and provides discreet air distribution. Power is supplied from the outdoor unit, simplifying electrical coordination. This system operates on 208/230V single-phase power and is ENERGY STAR® certified.

Performance

This system achieves a rated efficiency of 20.9 SEER2 and 12.2 HSPF2, supported by an inverter-driven twin rotary compressor. Pulse Amplitude Modulation technology precisely regulates compressor output to match space demand. Cooling capacity modulation ranges from 2,200 to 9,000 BTU, while heating modulation supports operation down to -4°F. Indoor airflow reaches up to 311 CFM in cooling and 325 CFM in heating. Blue Fin coated outdoor coils enhance heat exchange and corrosion resistance.

Smart Features

Integrated Wi-Fi connectivity allows control through the Mitsubishi Comfort app. Users can adjust temperature, fan speed, vane direction, and schedules remotely. Compatibility with wired and wireless controllers supports flexible control strategies. Optional third-party thermostat interfaces enable broader building automation integration. Weekly timer functionality supports programmed comfort schedules.

Comfort & Noise

Indoor sound levels operate as low as 27 dBA in cooling and 26 dBA in heating. Auto vane control distributes air in multiple directions to reduce drafts. Econo Cool mode dynamically adjusts airflow based on heat exchanger temperature. Hot-start technology prevents cold air discharge during heating startup. Outdoor sound levels remain controlled at 48 dBA cooling and 50 dBA heating.

Use Case Fit

This system is well suited for residential spaces, condominiums, and light commercial rooms. The ceiling cassette format is ideal where wall space is limited. Single-zone operation supports dedicated room comfort control. Cold-climate heating capability enables use across varied U.S. regions. Compact outdoor dimensions allow flexible placement.

Value & Reliability

DC fan motors and inverter technology support long-term operational stability. The washable antibacterial filter supports indoor air quality maintenance. Bottom-access serviceability simplifies routine maintenance. Corrosion-resistant outdoor components extend service life in coastal or industrial environments. Automatic restart restores operation after power interruptions.

Summary Wrap-Up

The MLZ-KX09NL-SUZ-AA09NL bundled system delivers efficient, quiet, and flexible comfort control in a compact ceiling-mounted configuration. Advanced inverter performance, smart connectivity, and cold-weather capability make it suitable for both residential and light commercial applications. Its balanced design supports energy efficiency, occupant comfort, and long-term reliability. This system provides a complete single-zone solution with integrated indoor and outdoor performance.

Key Features

  • Electric heat pump system: Provides both cooling and heating using inverter-driven compressor technology.
  • Ceiling-mounted indoor unit: Fits between 16-inch joists for low-profile installation and even air distribution.
  • Variable-capacity operation: Modulates output from low to full capacity for stable temperature control.
  • Wi-Fi control integration: Enables remote operation and scheduling through the Comfort app.
  • Cold-climate heating capability: Maintains heating performance down to -4°F outdoor temperatures.
  • Corrosion-resistant outdoor coil: Blue Fin coating supports durability in harsh environments.

Replaces Discontinued Models

Replacement matches are based on unit type, capacity and features. Verify line set, electrical supply and controls before ordering. See the discontinued Mitsubishi model cross-reference for details and original manuals.

White Paper

Comfort for the people who live there

The right equipment keeps the rooms you live in steady and quiet, whether it's dinner in the kitchen or a weekend project in the garage.

Specifications

Extra Information

Find your comfort-ready size with confidence

Get a fast, learning-friendly estimate for tons and BTUs, then review it with a Pro to dial in the perfect fit for your home.

Brand:
Mitsubishi Electric
Width:
31.50 (in)
Height:
21.63 (in)
Depth:
11.25 (in)
Weight:
115.00 LBS
Safety Information:
⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Prop 65 Warning:
Yes
Cooling Capacity (BTU):
9,000
Capacity (Tons):
0.75
Zones:
1
Mount Type:
Ceiling Recessed
System Type:
Heat Pump
SEER2:
20+ SEER2
EER2:
11 EER2
HSPF2:
10+ HSPF2
Cold Climate:
No
Minimum Heating Temp (°F):
-4
Refrigerant Type:
R-454B
Electrical Phase:
1-Phase
Wi-Fi Control:
Optional Kit
Energy Star Listed:
Yes
Sound Level Indoor (dB):
26
Sound Level Outdoor (dB):
48
Line Set Size:
1/4 in x 3/8 in
Voltage / Phase:
208/230V 1-Phase
Outdoor Unit SUZ-AA09NL - Nominal Capacity (Tons):
0.75
Outdoor Unit SUZ-AA09NL - Cooling Capacity (BTU/h):
9,000
Outdoor Unit SUZ-AA09NL - Heating Capacity (BTU/h):
12,000
Outdoor Unit SUZ-AA09NL - Maximum Indoor Units (Zones):
1
Outdoor Unit SUZ-AA09NL - Refrigerant:
R-454B
Outdoor Unit SUZ-AA09NL - Voltage/Phase/Hz:
208-230 V / 1 Ph / 60 Hz
Outdoor Unit SUZ-AA09NL - Minimum Circuit Ampacity (MCA):
13 A
Outdoor Unit SUZ-AA09NL - Maximum Overcurrent Protection (MOP):
22 A
Outdoor Unit SUZ-AA09NL - Compressor Type:
Twin Rotary
Outdoor Unit SUZ-AA09NL - Minimum Heating Temp (F):
-5 F
Outdoor Unit SUZ-AA09NL - Sound Level (dB):
48
Outdoor Unit SUZ-AA09NL - Liquid Line Size:
1/4 in
Outdoor Unit SUZ-AA09NL - Suction Line Size:
3/8 in
Outdoor Unit SUZ-AA09NL - Unit Dimensions (W x D x H):
31.5 in x 11.25 in x 21.63 in
Outdoor Unit SUZ-AA09NL - Unit Weight:
81 lb
Outdoor Unit SUZ-AA09NL - Shipping Weight:
88.18 lb
Indoor Unit MLZ-KX09NL - Type:
Ceiling Cassette
Indoor Unit MLZ-KX09NL - Nominal Capacity (Tons):
0.75
Indoor Unit MLZ-KX09NL - Cooling Capacity (BTU/h):
9,000
Indoor Unit MLZ-KX09NL - Heating Capacity (BTU/h):
12,000
Indoor Unit MLZ-KX09NL - Refrigerant:
R-454B
Indoor Unit MLZ-KX09NL - Airflow (CFM):
cool 201-311; heat 212-325
Indoor Unit MLZ-KX09NL - Sound Level (dB):
cool 27-38; heat 26-37
Indoor Unit MLZ-KX09NL - Liquid Line Size:
1/4 in
Indoor Unit MLZ-KX09NL - Suction Line Size:
3/8 in
Indoor Unit MLZ-KX09NL - Unit Dimensions (W x D x H):
43.375 in x 14.1875 in x 7.3125 in
Indoor Unit MLZ-KX09NL - Unit Weight:
34 lb
Indoor Unit MLZ-KX09NL - Shipping Weight:
42 lb
Replaces Models:
SUZ-KA09NA, SUZ-KA09NA2, SUZ-KA09NAR1, MLZ-KP09NA, MLZ-KP09NA2
Please Note: To validate the manufacturer's warranty, equipment must be installed by a qualified licensed professional in accordance with local codes and the manufacturer's installation requirements.

2023 Energy Standards

Department of Energy (DOE) State Regulations – Effective 2023

Click the link below to view the energy standards applicable to your region.

DOE State Standards Document

Department of Energy (DOE) State Regulations – Effective 2023

Click the link below to view the energy standards applicable to your region.

DOE State Standards Document

Documents & warranty
Warranty
7 Years Compressor & 5 Years Parts | Registration Required within 90 Days of Purchase
Videos2 videos
How A Heat Pump Works - Mitsubishi Electric Heating & Cooling
Frequently asked questions
How much cooling does the provide?
It is rated for 9,000 BTU of cooling.
What size is the ?
The is a 0.75 ton unit.
How many zones does the support?
It supports 1 zone(s).
What is the SEER2 rating of the ?
The is rated at 20+ SEER2 SEER2.
What is the HSPF2 heating efficiency of the ?
It is rated at 10+ HSPF2 HSPF2.
How cold can it be outside for the to keep heating?
It is rated to heat down to -4 °F outdoors.
What refrigerant does the use?
It uses R-454B refrigerant.
Can the be controlled over Wi-Fi?
Optional Kit.
How loud is the outdoors?
The rated outdoor sound level is 48 dB.
What power supply does the need?
It requires 208/230V 1-Phase power.
Which models does the replace?
SUZ-KA09NA, SUZ-KA09NA2, SUZ-KA09NAR1, MLZ-KP09NA, MLZ-KP09NA2
What warranty comes with the SUZ-AA09NL-MLZ-KX09NL?
7 Years Compressor & 5 Years Parts | Registration Required within 90 Days of Purchase
Who makes the SUZ-AA09NL-MLZ-KX09NL?
The SUZ-AA09NL-MLZ-KX09NL is made by Mitsubishi Electric.

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