How to Pick the Perfect Mini Split Wall Mounted Indoor Unit
Wall-mounted units are the most commonly found, most affordable option for indo...
Local Pickup FAQ's
On Sale
Hover to zoom
1 Of 5
LG Wall Mounted 3-Zone LGRED° Heat System - 42,000 BTU Outdoor - 9k + 12k + 24k Indoor - 21.5 SEER2
Model:
L3L42W09122400
+
Share This Product
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
- Integrated Base Pan Heater
- Base pan heaters come factory installed on all LGRED° outdoor condensers in order to mitigate the risk of damage caused by freezing condensate.
- Inverter Technology
- LG's inverter technology features an electronic expansion valve and a variable speed compressor that carefully regulates refrigerant flow, reducing energy consumption and providing consistent, accurate temperatures without overshooting or short-cycling.
- Gold Fin Protection
- To ensure the reliability and longevity of the LMU420HHV's heat exchanger, LG employs a Gold Fin coating that prevents corrosion and improves durability.
- Quiet Design
- Thanks to a brushless direct current fan motor, both the outdoor and indoor units in this system produce less mechanical and electrical noise, allowing them to provide comfort that doesn't disrupt your home.
- Air Flow Options
- This unit gives you two options for automating air flow. In swing mode, the unit will rotate through all four air flow directions. With the Chaos Wind feature, the unit cycles both air flow direction and fan speed.
- Self-Cleaning Coil
- These wall mount units feature a self-cleaning heat exchanger coil that automatically removes dirt and moisture. This helps to prevent unpleasant odors and to combat the formation of mold.
- Jet Temperature Control
- Getting your zone comfortable quickly is no problem thanks to the Jet Heat and Jet Cool modes. With the press of a button, your system will temporarily adjust the set point and fan speed to provide rapid heating or cooling.
- Automated Operation
- Auto operation mode continually compares your zone's current and desired temperatures and uses that data to intelligently adjust the unit's fan speed and refrigerant flow to provide optimal comfort.
- Sleep Mode
- With the sleep mode and timer functions, you can set this indoor unit to save energy at night. Sleep mode will incrementally adjust temperature for an hour before the timer function automatically deactivates the unit.
- Dehumidify
- LG's multi-zone indoor units include a dehumidifying operation mode. In this mode, the unit's internal sensors monitor temperature and modify the set point and fan speed to remove moisture from the air.
- Improved Air Quality
- The LG wall mounted units use a dual filtration system to keep your air clean. A washable filter is backed up by a plasma filtration system that can attract and capture microscopic irritants for pristine air quality.
- Hot Start
- When the hot start function is enabled, the outdoor unit's fan will not engage until the outdoor condenser has had the opportunity to warm the indoor coil. This prevents the unit from blowing cold air during heating operations.
- Built in Wi-Fi
- With built in Wi-Fi, you have the ability to control your LG air conditioner with smart enabled devices. Simply download the SmartThinQ® app on your smart device to get started.
- Recommended line set sizes for indoor unit connectivity:
- LSN090HSV5: 1/4" x 3/8" Line Set
- LSN120HSV5: 1/4" x 3/8" Line Set
- LMN248HVT: 1/4" x 1/2" Line Set
- A branch box with a 3/8" x 3/4" line set connection is also required. Additional branch boxes and line sets may be required based on your configuration.
- All LG branch boxes systems require a min of 16.4 feet of line set between the condenser and the branch box, from the branch box to the distribution box and from the distribution box to the indoor unit.
- All LG branch boxes systems require a min of 16.4 feet of line set between the condenser and the branch box, from the branch box to the distribution box and from the distribution box to the indoor unit.
- (1) LG - 42k BTU - LGRED° Heat Outdoor Condenser - For 2-6 Zones (LMU421HHV)
- (1) LG 24k BTU Wall Mounted Unit - For Multi-Zone (LMN249HVT)
- (1) LG 12k BTU Wall Mounted Unit - For Multi or Single-Zone (LSN120HSV5)
- (1) LG 9k BTU Wall Mounted Unit - For Multi or Single-Zone (LSN090HSV5)
- (1) LG Multi F - Branch Box - 3 Ports (PMBD3630)
- Line Set - This double insulated tubing transfers refrigerant efficiently between your outdoor condenser and indoor units.
- Branch Box - An LG branch box is required to connect this condenser to LG mini split 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.
LG continues to demonstrate global leadership in innovation and technology with their advancements in home comfort solutions. The LGRED° Heat ductless heat pump system boasts superior heating performance in extreme cold weather climates. The powerful LMU420HHV outdoor condenser works with LG indoor units to provide the maximum amount of comfort control for your home. With several air flow options, quiet operation, and weather protection technology, the LGRED° Heat system is accommodating to nearly every home.
Product Includes
Product Note
This product requires at least two compatible LG mini split indoor units and the following accessories for installation:
LG products include a 10-year warranty with the requirement that installation is completed by a licensed contractor and that the product is registered at https://lg-dfs-warranty.com/ within 60 days of installation.
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.
LG products include a 10-year warranty with the requirement that installation is completed by a licensed contractor and that the product is registered at https://lg-dfs-warranty.com/ within 60 days of installation.
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.
California residents see
Warning: This product can expose you to chemicals including Carbon black (airborne, unbound particles of respirable size) which is known to the State of California to cause Cancer.
For more information go to: www.p65Warnings.ca.gov
Specifications
Product Includes
- (1) LG - 42k BTU - LGRED° Heat Outdoor Condenser - For 2-6 Zones (LMU421HHV)
- (1) LG 24k BTU Wall Mounted Unit - For Multi-Zone (LMN249HVT)
- (1) LG 12k BTU Wall Mounted Unit - For Multi or Single-Zone (LSN120HSV5)
- (1) LG 9k BTU Wall Mounted Unit - For Multi or Single-Zone (LSN090HSV5)
- (1) LG Multi F - Branch Box - 3 Ports (PMBD3630)
L3L42W09122400
Overview
Product Category
Mini Split Heat Pump System
General Information
Type
Wall Mounted
Product Line
LGRED Heat
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.
3
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 + 12 + 24
Base Pan Heater Included
Yes
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
Cooling Power Input
3000 Watts
Heating Power Input
3290 Watts
Low Ambient Heating
Yes
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
-13 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.
21.5
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.
13.8
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.
11.0
Dimensions
Product Weight
293.7 Pounds
Shipping Weight
297.7 Pounds
Certifications
ETL Listed
Yes
Energy Star Listed
Yes
AHRI Certified
Yes
AHRI Reference Number
206717001
LMU421HHV
General Information
Type
Outdoor Condenser
Product Line
LGRED Heat
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
6
Multi-Zone Compatible
Yes
Refrigerant Type
R-410A
Installation Location
Outdoor
Branch Box Required
Branch Box Required
By making a single connection to the outdoor condenser, a branch box can supply the right amount of refrigerant to multiple indoor units. Learn More
Yes
Base Pan Heater Included
Yes
Performance
Cooling BTU
42000
Cooling Power Input
3040 Watts
Heating Power Input
3700 Watts
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
56 dB
Low Ambient Heating
Yes
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
-13 F
Minimum Outdoor Temperature for Cooling
14 F
Electrical Data
Voltage
208/230 Volts
Phase
1
Frequency
60 Hz
Minimum Circuit Ampacity
32.7 Amps
Recommended Breaker Size
40 Amps
Dimensions
Maximum Line Length
475.7 Feet
Gas Connection Size
3/4 Inch
Liquid Connection Size
3/8 Inch
Product Depth
13 Inches
Product Weight
218 Pounds
Shipping Weight
243 Pounds
Certifications
ETL Listed
Yes
UL Listed
Yes
ISO 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
Overview
Product Category
Mini Split System Components
LMN249HVT
General Information
Type
Wall Mounted
Product Line
Multi F
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.
24
Installation Location
Indoor
Performance
Cooling BTU
24000
Cooling Capacity
24000 BTU
Maximum Air Flow
597 CFM
Minimum Air Flow
367 CFM
Minimum Sound Level
36 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
42 dB
Electrical Data
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
1/2 Inch
Liquid Connection Size
1/4 Inch
Drain Outlet Diameter
5/8 Inch
Product Height
12 19/24 Inches
Product Width
40 9/16 Inches
Product Depth
9 41/48 Inches
Product Weight
31 Pounds
Shipping Weight
36 Pounds
Certifications
UL Listed
Yes
ETL Listed
Yes
ISO 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
LSN120HSV5
General Information
Type
Wall Mounted
Product Line
Multi F
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
282 CFM
Minimum Air Flow
177 CFM
Minimum Sound Level
19 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
39 dB
Electrical Data
Phase
1
Frequency
60 Hz
Dimensions
Maximum Line Length
82 Feet
Gas Connection Size
3/8 Inch
Liquid Connection Size
1/4 Inch
Drain Outlet Diameter
5/8 Inch
Product Height
12 1/8 Inches
Product Width
32 15/16 Inches
Product Depth
8 1/4 Inches
Product Weight
20 Pounds
Shipping Weight
26 Pounds
Certifications
ETL Listed
Yes
UL Listed
Yes
ISO 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
LSN090HSV5
General Information
Type
Wall Mounted
Product Line
Multi F
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
268 CFM
Minimum Air Flow
169 CFM
Minimum Sound Level
19 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
39 dB
Electrical Data
Phase
1
Frequency
60 Hz
Dimensions
Maximum Line Length
82 Feet
Gas Connection Size
3/8 Inch
Liquid Connection Size
1/4 Inch
Drain Outlet Diameter
5/8 Inch
Product Height
12 1/8 Inches
Product Width
32 15/16 Inches
Product Depth
8 1/4 Inches
Product Weight
20 Pounds
Shipping Weight
26 Pounds
Certifications
ETL Listed
Yes
UL Listed
Yes
ISO 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
PMBD3630
General Information
Type
Branch Box
Product Line
Multi F
Product Category
Mini Split Accessories
Ports Quantity
3
Performance
Maximum Port Capacity
24000 BTU
Maximum Total Port Capacity
72000 BTU
Electrical Data
Power Consumption
24 Watts
Phase
1
Frequency
60 Hz
Dimensions
Suction Connection Size
3/4 Inch
Liquid Connection Size
3/8 Inch
Line Set A Liquid Connection
1/4 Inch
Line Set A Gas Connection
3/8 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
Product Height
5 11/12 Inches
Product Width
9 41/48 Inches
Product Depth
11 13/16 Inches
Product Weight
15 Pounds
Shipping Weight
17 Pounds
Certifications
Country of Origin
Korea
Overview
Product Category
Mini Split Accessories
Reviews
(1)
LG L3L42W09122400 Reviews & Ratings
Product Q&A
Be the First to Ask A Question
Answered by Ken, the eComfort Product Expert
How-To Articles
What You Should Know About Mini-Split Wiring
Although they are easier to install than central air conditioning systems, mini...
How to Pick the Perfect Mini Split Floor Mounted Indoor Unit
If you are installing a mini split system but you don't have enough clearance f...
eComfort How-To Library
Articles, Tips and Buying Guides from Our Experts
Manuals
LMN249HVT
LSN090HSV5
Ask A Question!
*Required Fields
+
Thank You For Submitting Your Question
Your submission has been sent successfully. Please give our experts up to two business days to respond.
Media Gallery
LG Wall Mounted 3-Zone LGRED° Heat System - 42,000 BTU Outdoor - 9k + 12k + 24k Indoor - 21.5 SEER2
Customer Review Images
