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Carrier Performance Series
12,000 BTU Mini-Split Indoor Air Conditioner

Built-in Base Pan Heater Variable Speed 5 Modes
product highlights
Energy Star Rated
Energy Star Rated Energy Star products save energy without sacrificing on performance. They’re great for the environment, and they lower your monthly utility bills. Plus, some customers can receive tax breaks or rebates for buying Energy Star-rated appliances.

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Product Information
Brand: Carrier
Series: Performance Series
Model: 40MBQB12D3
AC System Type: Mini Split
Component Type: Indoor Unit
Operation: Cooling with Heat Pump
Placement Type: Concealed Duct
Wireless Remote Control(s) Included: Included
Wired Remote Control(s) Included: Included
Thermostat Range - Cooling (F°): 62-86
Thermostat Range - Heating (F°): 62-86
BTU Class: 12,000 BTU
Heating Capacity: 13,500 BTU
Electrical Data
Power Source V / Hz / Ø: (208/230/60/1)
Rated Amps: 15 Amps
Energy Star Certified: Yes
Airflow Rate Low (CFM): 290 CFM
Airflow Rate Medium (CFM): 340 CFM
Airflow Rate High (CFM): 380 CFM
Operating Sound Level - Low (dB): 30 dB
Operating Sound Level - Medium (dB): 34 dB
Operating Sound Level - High (dB): 38 dB
Piping Connections
Liquid Line Outer Diameter: 1/4 Inch
Suction Line Outer Diameter: 1/2 Inch
Refrigeration System
Piping Length (No Additional Refrigerant): 82 Ft.
Control Lock Function (Concealed Duct Only): Yes
Human Detection Technology: Yes
Room-Freeze Protection: Yes
Filter Clean Notification: No
Hot Start Heating System (Heat Pumps Only): No
Program Timer: Yes
Manual Power Switch: No
Defrost/Deicing: Yes
Air Filter: Yes
Filters Washable?: Yes
Filters Anti-microbial?: No
Restart Delay: Yes
Self-diagnosis: No
Condensate Sensor Connection: No
Soft Start: No
Quiet/Sleep Mode: No
Self-Cleaning Indoor Coil: Yes
Built-in Drain Pump (Indoor Unit): No
Hidden Display: No
Surge Cool/Heat: No
Auto Operation: Yes
Auto Restart on Power Failure: Yes
Auto-changeover: No
Automatic Louver Adjustment: No
4-Way Swing: No
Dehumidifying Mode: Yes
No. of Fan Speeds: 3
Technical Details
ADA Compliant: No
Voltage: 230/208 Volts
Warranty Terms
Parts Warranty: 5 Year
Dimensions & Weights
Width: 27 3/5 Inch
Depth: 25 Inch
Height: 8 3/10 Inch
Net Weight: 39.9 Lbs.
Shipping Weight: 50 Lbs.
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From the Manufacturer

Carrier 12,000 BTU Concealed Duct Indoor Air Conditioner with Heat Pump
The most camouflaged option of mini-split indoor air conditioner installation types, this concealed duct model is a great solution for air-conditioning that's seamless and unobtrusive. The model comes with a wired remote control with timer capabilities as well as one-touch memory, which recalls your previously selected temperature in any mode. Plus, with a 5 year parts warranty, you can rest assured that your air conditioner will provide optimum comfort for years to come. **Note that concealed duct air conditioners will require minor ductwork for installation.**

Manuals & Guides

  • Specifications
  • Features
  • Reviews
  • Warranty Info


Energy Star:  
Cooling Rated Capacity:  
11,000 BTU/h
Cooling Capacity Range Min - Max:  
4,000 - 13,000 BTU/h
Heating Rated Capacity:  
11,800 BTU/h
Heating Capacity Range Min - Max:  
5,000 - 13,500 BTU/h
Control Type:  
Standard Wireless and Standard Wired
Operating Range
Cooling Outdoor DB Min - Max:  
4° - 122° F
Heating Outdoor DB Min - Max:  
4° - 86° F
Total Piping Length:  
82 Ft.
Piping Lift:  
32 Ft.
Pipe Connection Size - Liquid:  
Pipe Connection Size - Suction:  
60 Hz
Power Supply:  
Indoor Unit Powered from Outdoor Unit
MCOP - Fuse Rating:  
Outdoor Dimensions
Overall Width:  
31 9/10"
Overall Depth:  
12 1/5"
Overall Height:  
Net Weight:  
82.4 Lbs.
945 CFM
Sound Pressure:  
56 dBA
Indoor Dimensions
Overall Width:  
27 3/5"
Overall Depth:  
Overall Height:  
8 3/10"
Net Weight:  
39.9 Lbs.
Number of Fan Speeds:  
290/340/380 CFM
Sound Pressure:  
30/34/38 dBA
Max Static Pressure:  


Concealed Duct Indoor Air Conditioner

Concealed Duct Indoor Air Conditioner

Fan Features
5 Modes

Cool, Heat, Dry, Fan, and Auto modes provide multiple airflow options for maximum comfort.

Motorized Louver

Provides fixed or oscillating motion for customized air flow.

One-Touch Memory

System reverts to the last set temperature in a selected mode.

46°F Heating Mode

Air conditioner will automatically operate in heat function when outside temperatures dip below 46° F to prevent pipes from freezing.

Follow Me

Option to measure temperature from the remote control temperature sensor for more accurate temperature control.

Additional Features

Set cooling and heating operation in advance.

Carrier Performance Series 40MBQB12D3 Reviews

Warranty Info

Warranties on mini split air conditioners only include parts and do not include labor. The licensed HVAC Technician who installs your air conditioner should always provide you with a labor warranty (preferably for at least a full year to compliment the manufacturers' parts warranty).

AJ Madison will only finalize a Mini Split (Ductless Split System) purchase with an authorized HVAC Technician. AJ Madison recommends the installation of a mini-split system to be performed by a trained and qualified HVAC technician with the proper knowledge and background. A trained technician will be able to judge the best location for the air handling (evaporator) unit and also the correct size for the area the unit will heat and/or cool. For assistance with all your technical needs please contact our technical department at

Should you experience an issue during the installation or the initial startup of a unit please do not contact the manufacturer. You should have the technician that installed your system contact either AJ Madison or the manufacturer. We cannot accept any service or warranty calls from anyone but a licensed HVAC technician. We have a full technical support team available to help you throughout the installation process.

AJ Madison, Inc. cannot be held liable for improper installation and operation of any product purchased from our company. Should a warranty issue arise in which parts will need to be replaced, an installation receipt will be required along with your AJ Madison sales receipt. Failure to provide a receipt or invoice may result in the warranty not being honored.