How to Pick the Perfect Mini Split Floor Mounted Indoor Unit
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Mitsubishi Floor Mounted 4-Zone System - 42,000 BTU Outdoor - 9k + 9k + 12k + 12k Indoor - 19.7 SEER2
Model:
M4H42F09091212
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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
- 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-KJ can improve the efficiency of cooling operations without compromising the comfort provided.
- Powerful Mode
- The powerful setting on the MFZ-KJ 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.
- Multiple Airflow Options
- 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.
- Dehumidification
- When the indoor unit is run in dry mode, it will remove unwanted moisture. This improves your comfort and reduces the chance of mold growth and other property damage in the room.
- 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.
- Hot Start
- Mitsubishi's hot-start technology prevents cold drafts by delaying fan operation until the heat exchanger has warmed up.
- Recommended line set sizes for indoor unit connectivity:
- MFZ-KJ09NA-U1: 1/4" x 3/8" Line Set (Qty 2)
- MFZ-KJ12NA-U1: 1/4" x 3/8" Line Set (Qty 2)
- (1) Mitsubishi - 42k BTU - M-Series Outdoor Condenser - For 2-5 Zones (MXZ-5C42NA4)
- (2) Mitsubishi M-Series 12k BTU Floor Mounted Unit - For Multi or Single-Zone (MFZ-KJ12NA-U1)
- (2) Mitsubishi M-Series 9k BTU Floor Mounted Unit - For Multi or Single-Zone (MFZ-KJ09NA-U1)
- 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.
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. With four 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 - 42k BTU - M-Series Outdoor Condenser - For 2-5 Zones (MXZ-5C42NA4)
- (2) Mitsubishi M-Series 12k BTU Floor Mounted Unit - For Multi or Single-Zone (MFZ-KJ12NA-U1)
- (2) Mitsubishi M-Series 9k BTU Floor Mounted Unit - For Multi or Single-Zone (MFZ-KJ09NA-U1)
M4H42F09091212
Overview
Product Category
Mini Split Heat Pump System
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.
4
Refrigerant Type
R-410A
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 + 12 + 12
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.
19.7
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.
9.2
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.
9.2
Dimensions
Product Weight
321 Pounds
Shipping Weight
325 Pounds
Certifications
ETL Listed
Yes
AHRI Certified
Yes
AHRI Reference Number
212925465
MXZ-5C42NA4
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-410A
Installation Location
Outdoor
Base Pan Heater Included
No
Performance
Cooling BTU
42000
Cooling Capacity
43000 BTU
Heating Capacity
53600 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
58 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
32.5 Amps
Recommended Breaker Size
40 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
41 13/48 Inches
Product Width
37 19/48 Inches
Product Depth
13 Inches
Product Weight
189 Pounds
Shipping Height
48 7/16 Inches
Shipping Width
41 3/8 Inches
Shipping Depth
17 3/8 Inches
Shipping Weight
218 Pounds
Certifications
ETL Listed
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-KJ12NA-U1
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-410A
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
Maximum Air Flow
343 CFM
Minimum Air Flow
117 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
41 dB
Electrical Data
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
3/8 Inch
Liquid Connection Size
1/4 Inch
Drain Outlet Diameter
5/8 Inch
Product Height
23 5/8 Inches
Product Width
29 25/48 Inches
Product Depth
8 23/48 Inches
Product Weight
33 Pounds
Shipping Height
27 3/4 Inches
Shipping Width
32 3/4 Inches
Shipping Depth
12 Inches
Shipping Weight
43 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
Overview
Product Category
Mini Split System Components
MFZ-KJ09NA-U1
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-410A
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
Maximum Air Flow
343 CFM
Minimum Air Flow
117 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
41 dB
Electrical Data
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
3/8 Inch
Liquid Connection Size
1/4 Inch
Drain Outlet Diameter
5/8 Inch
Product Height
23 5/8 Inches
Product Width
29 25/48 Inches
Product Depth
8 23/48 Inches
Product Weight
33 Pounds
Shipping Height
27 3/4 Inches
Shipping Width
32 3/4 Inches
Shipping Depth
12 Inches
Shipping Weight
43 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
Overview
Product Category
Mini Split System Components
Reviews
(2)
Mitsubishi M4H42F09091212 Reviews & Ratings
Product Q&A
(1)
Product Questions
Answered by Ken, the eComfort Product Expert
Can these systems can be controlled by the Nest learning thermostat?
Jeff
from New York
February 15, 2017
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Manuals
MXZ-5C42NA4
MFZ-KJ12NA-U1
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Mitsubishi Floor Mounted 4-Zone System - 42,000 BTU Outdoor - 9k + 9k + 12k + 12k Indoor - 19.7 SEER2
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