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Mitsubishi Floor Mounted Mini Split Heat Pump System - 5-Zone - 42k BTU Outdoor - 9k + 9k + 9k + 12k + 15k Indoor - 19.3 SEER2 - R-454B
Model:
MXZ-5D42NL 3-MFZ-KX09 MFZ-KX12 MFZ-KX15
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Recommended Accessories

Expert Recommended Accessories
Selected by Ken, our Expert
Required Accessories
9
These accessories are required to properly setup/install this product.
Optional Accessories
10
Features
- Precision Temperature Control Technology
- The outdoor condenser is equipped with inverter technology and an electronic linear expansion valve. These components improve temperature accuracy and system efficiency through precise adjustments of both compressor speed and refrigerant flow.
- Smart Set
- Mitsubishi's Smart Set function allows you to save a cooling profile and a heating profile, each consisting of a temperature, a fan speed, and an airflow direction. These profiles can be activated easily with a press of the Smart Set button on the remote.
- Econo Cool Mode
- By slowly adjusting the cooling set point and swinging the horizontal vanes, the MFZ-KX can improve the efficiency of cooling operations without compromising the comfort provided.
- Dehumidification
- When the indoor unit runs in dry mode, the coil's temperature stays just below the dew point of the return air, removing unwanted moisture. This improves comfort and reduces the chance of mold growth and other property damage in the conditioned space.
- Powerful Mode
- The powerful setting on the MFZ-KX makes it easy to get your zone to the perfect temperature quickly. When it is activated, the unit temporarily increases refrigerant flow and fan speed to provide quick comfort through rapid heating or cooling.
- Multiple Vane Control Options
- Auto mode selects the best vane position based on operating mode, and the swing modes cycle through all positions for maximum coverage.
- Flow Operation
- When 2 Flow is selected the unit will blow air from the top and front of the unit. When 1 Flow is selected, air only blows from the top of the unit.
- Blue Fin Condenser
- Condensers are constantly exposed to wind, dust and salty air that take their toll on your unit. Mitsubishi coats their condensers with an anti-rust coating to extend its lifespan.
- Recommended line set sizes for indoor unit connectivity:
- MFZ-KX09NL: 1/4" x 3/8" Line Set (Qty 3)
- MFZ-KX12NL: 1/4" x 3/8" Line Set
- MFZ-KX15NL: 1/4" x 1/2" Line Set
- (1) Mitsubishi M-Series Outdoor Condenser - 2-5 Zones - 42k BTU - R-454B (MXZ-5D42NL)
- (1) Mitsubishi M-Series Floor Mounted Unit - Multi or Single-Zone - 15k BTU - R-454B (MFZ-KX15NL)
- (1) Mitsubishi M-Series Floor Mounted Unit - Multi or Single-Zone - 12k BTU - R-454B (MFZ-KX12NL)
- (3) Mitsubishi M-Series Floor Mounted Unit - Multi or Single-Zone - 9k BTU - R-454B (MFZ-KX09NL)
- Line Set - This double insulated tubing transfers refrigerant efficiently between your outdoor condenser and indoor units.
- Drain Tubing - Drain tubing facilitates the reliable and effective removal of condensate from your system. It connects your indoor units to drain locations of your choosing.
- Disconnect Box & Electrical Whip Kit - The Disconnect Box & Whip Kit provides a safe and simple way to connect your outdoor condenser to your fuse box.
- Connecting Wire - This durable, insulated wire provides power to your indoor units from your outdoor condenser.
- Outdoor Condenser Plastic Pad or Wall Bracket - We recommend outdoor condensers should not be placed directly on the ground. An outdoor condenser pad or wall bracket will provide a stable way to mount your condenser free from obstructions and debris. Adding these accessories to your order will provide a complete, ready-to-install mini split system. All Mini Split Systems require one Primary Mini Split Installation Kit. You may also require one or more Secondary Installation Kits if you have a Multi-Zone system. You will need a Secondary Installation Kit for each additional indoor unit.
For over 50 years, Mitsubishi has remained at the forefront of the mini split industry thanks to their dedication to providing efficient, user-friendly comfort solutions. Mitsubishi's floor mounted indoor units are a great alternative for rooms where you don't have the ceiling height or wall space to allow for a wall mounted unit. An MXZ multi-room system is an excellent choice for supplementing capacity to a current system, conditioning newly furnished spaces, or new additions and replacing a system within a home. With five included wireless remote controllers, this system is the perfect combination of convenience and comfort for any heating or cooling application.
Product Includes
Product Note
This product requires the following accessories for installation:
Specifications
Product Includes
- (1) Mitsubishi M-Series Outdoor Condenser - 2-5 Zones - 42k BTU - R-454B (MXZ-5D42NL)
- (1) Mitsubishi M-Series Floor Mounted Unit - Multi or Single-Zone - 15k BTU - R-454B (MFZ-KX15NL)
- (1) Mitsubishi M-Series Floor Mounted Unit - Multi or Single-Zone - 12k BTU - R-454B (MFZ-KX12NL)
- (3) Mitsubishi M-Series Floor Mounted Unit - Multi or Single-Zone - 9k BTU - R-454B (MFZ-KX09NL)
MXZ-5D42NL 3-MFZ-KX09 MFZ-KX12 MFZ-KX15

General Information
Type
Floor Mounted
Product Line
M-Series
Product Category
Mini Split Heat Pump System
Operating Mode
Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More
Heating and Cooling
Number of Zones
Number of Zones
A zone is a room or area within a building that has its own temperature control.
5
Refrigerant Type
R-454B
Indoor Unit Size(s)
Indoor Unit Size(s)
Mini split systems can have one or more indoor units connected to a single outdoor unit. Indoor Unit Size(s) specifies what indoor unit sizes are used in a system. We have combined 6k and 7k indoor units to enhance searchability.
9 + 9 + 9 + 12 + 15
Outdoor Unit Size
42000 BTU
DOE Regional Compliance
DOE Regional Compliance
In 2015, the US Department of Energy broke the country into three regions - North, Southeast, and Southwest - and set legal standards for energy efficiency within each region. Learn More
Nationwide
Performance
Low Ambient Heating
No
Minimum Outdoor Temperature for Heating
Minimum Outdoor Temperature for Heating
This is the lowest rated outdoor temperature for heating operation. Because heat pumps rely on heat available in outdoor air, the amount of heat they are able to supply decreases with outdoor temperatures. Learn More
5 F
Minimum Outdoor Temperature for Cooling
14 F
SEER2
SEER2
The U.S Department of Energy has raised the minimum rating requirements starting in 2023 that include updated testing conditions and metrics to better reflect real-world conditions. SEER2 (Seasonal Energy Efficiency Ratio) is a measurement of cooling efficiency over a typical cooling season. It is useful for comparing energy efficiency of cooling systems. The higher the SEER2, the more energy efficient the system.
19.3
EER2
EER2
The U.S Department of Energy has raised the minimum rating requirements starting in 2023 that include updated testing conditions and metrics to better reflect real-world conditions. EER2 (Energy Efficiency Ratio) is a measurement of cooling efficiency under fixed conditions. It is useful for comparing units that will operate consistently under one set of conditions (e.g. server room). The higher the EER2, the more efficient the system.
9.3
HSPF2
HSPF2
The U.S Department of Energy has raised the minimum rating requirements starting in 2023 that include updated testing conditions and metrics to better reflect real-world conditions. HSPF2 (Heating Seasonal Performance Factor) is a measure of heating efficiency for heat pumps. It is useful for comparing energy efficiency of heat pumps. The higher the HSPF2, the more efficient the system.
9.1
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Certifications
Energy Star Listed
No
AHRI Certified
Yes
AHRI Reference Number
216505932
MXZ-5D42NL
General Information
Type
Outdoor Condenser
Product Line
M-Series
Product Category
Mini Split System Components
Operating Mode
Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More
Heating and Cooling
Maximum Number of Zones
5
Multi-Zone Compatible
Yes
Refrigerant Type
R-454B
Installation Location
Outdoor
Base Pan Heater Included
No
Performance
Cooling BTU
42000
Cooling Capacity
40500 BTU
Heating Capacity
45000 BTU
Maximum Sound Level
Maximum Sound Level
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB. Learn More
59 dB
Low Ambient Heating
No
Minimum Outdoor Temperature for Heating
Minimum Outdoor Temperature for Heating
This is the lowest rated outdoor temperature for heating operation. Because heat pumps rely on heat available in outdoor air, the amount of heat they are able to supply decreases with outdoor temperatures. Learn More
5 F
Minimum Outdoor Temperature for Cooling
14 F
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Minimum Circuit Ampacity
39.2 Amps
Recommended Breaker Size
67 Amps
Dimensions
Maximum Line Length
262 Feet
Line Set A Liquid Connection
1/4 Inch
Line Set A Gas Connection
1/2 Inch
Line Set B Liquid Connection
1/4 Inch
Line Set B Gas Connection
3/8 Inch
Line Set C Liquid Connection
1/4 Inch
Line Set C Gas Connection
3/8 Inch
Line Set D Liquid Connection
1/4 Inch
Line Set D Gas Connection
3/8 Inch
Line Set E Liquid Connection
1/4 Inch
Line Set E Gas Connection
3/8 Inch
Product Height
31 17/48 Inches
Product Width
37 19/48 Inches
Product Depth
13 Inches
Product Weight
152 Pounds
Shipping Weight
178 Pounds
Certifications
ETL Listed
Yes
AHRI Certified
Yes
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Compressor Warranty
7 Years
MFZ-KX15NL
General Information
Type
Floor Mounted
Product Line
M-Series
Product Category
Mini Split System Components
Operating Mode
Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More
Heating and Cooling
Multi-Zone Compatible
Yes
Refrigerant Type
R-454B
Remote Control
Wireless
Indoor Unit Size(s)
Indoor Unit Size(s)
Mini split systems can have one or more indoor units connected to a single outdoor unit. Indoor Unit Size(s) specifies what indoor unit sizes are used in a system. We have combined 6k and 7k indoor units to enhance searchability.
15
Installation Location
Indoor
Performance
Cooling BTU
15000
Cooling Capacity
15000 BTU
Heating Capacity
18000 BTU
Moisture Removal
3.2 Pints/Hour
Maximum Air Flow
431 CFM
Minimum Air Flow
198 CFM
Minimum Sound Level
28 dB
Maximum Sound Level
Maximum Sound Level
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB. Learn More
49 dB
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
1/2 Inch
Liquid Connection Size
1/4 Inch
Product Height
23 5/8 Inches
Product Width
29 1/2 Inches
Product Depth
8 7/16 Inches
Product Weight
33 Pounds
Shipping Weight
40 Pounds
Certifications
ETL Listed
Yes
AHRI Certified
Yes
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
MFZ-KX12NL
General Information
Type
Floor Mounted
Product Line
M-Series
Product Category
Mini Split System Components
Operating Mode
Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More
Heating and Cooling
Multi-Zone Compatible
Yes
Refrigerant Type
R-454B
Remote Control
Wireless
Indoor Unit Size(s)
Indoor Unit Size(s)
Mini split systems can have one or more indoor units connected to a single outdoor unit. Indoor Unit Size(s) specifies what indoor unit sizes are used in a system. We have combined 6k and 7k indoor units to enhance searchability.
12
Installation Location
Indoor
Performance
Cooling BTU
12000
Cooling Capacity
12000 BTU
Heating Capacity
15000 BTU
Moisture Removal
1.9 Pints/Hour
Maximum Air Flow
417 CFM
Minimum Air Flow
138 CFM
Minimum Sound Level
21 dB
Maximum Sound Level
Maximum Sound Level
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB. Learn More
46 dB
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
3/8 Inch
Liquid Connection Size
1/4 Inch
Product Height
23 5/8 Inches
Product Width
29 1/2 Inches
Product Depth
8 7/16 Inches
Product Weight
33 Pounds
Shipping Weight
40 Pounds
Certifications
ETL Listed
Yes
AHRI Certified
Yes
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
MFZ-KX09NL
General Information
Type
Floor Mounted
Product Line
M-Series
Product Category
Mini Split System Components
Operating Mode
Operating Mode
Some products are only capable of cooling, while others can either heat or cool a space. Some products heat via "heat pump" technology while others use electric heating elements. Learn More
Heating and Cooling
Multi-Zone Compatible
Yes
Refrigerant Type
R-454B
Remote Control
Wireless
Indoor Unit Size(s)
Indoor Unit Size(s)
Mini split systems can have one or more indoor units connected to a single outdoor unit. Indoor Unit Size(s) specifies what indoor unit sizes are used in a system. We have combined 6k and 7k indoor units to enhance searchability.
9
Installation Location
Indoor
Performance
Cooling BTU
9000
Cooling Capacity
9000 BTU
Heating Capacity
12000 BTU
Moisture Removal
0.6 Pints/Hour
Maximum Air Flow
417 CFM
Minimum Air Flow
138 CFM
Minimum Sound Level
21 dB
Maximum Sound Level
Maximum Sound Level
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB. Learn More
46 dB
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
3/8 Inch
Liquid Connection Size
1/4 Inch
Product Height
23 5/8 Inches
Product Width
29 1/2 Inches
Product Depth
8 7/16 Inches
Product Weight
33 Pounds
Shipping Weight
40 Pounds
Certifications
ETL Listed
Yes
AHRI Certified
Yes
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
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Mitsubishi Floor Mounted Mini Split Heat Pump System - 5-Zone - 42k BTU Outdoor - 9k + 9k + 9k + 12k + 15k Indoor - 19.3 SEER2 - R-454B





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