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LG 3 Zone Mini Split Systems

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What is an LG 3 zone mini split system?

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LG 3 zone mini split systems are ductless heating and cooling solutions that provide temperature control and dehumidification for three separate rooms or zones with a combined area up to 3,000 square feet.

These systems work by delivering cooled or heated air into each room through a series of three indoor air handlers. Also called heads, the air handling units are all connected to a single outdoor condenser unit that transfers refrigerant to each head through line sets containing copper tubing and electrical wiring.

LG HVAC products are known for their appealing combination of style, functionality, and efficiency at a great value for the price.

 

What spaces are best for LG 3 zone mini split systems?

Designed to heat and cool three independent zones or rooms, an LG 3 zone mini split system is ideal for multi-room layouts with 600 to 3,000 square feet of combined space. Some examples are:

  • Three Bedrooms: An LG 3 zone mini split is perfect for servicing three separate bedrooms. Thanks to Dual Inverter technology, LG air handlers operate at whisper-quiet noise levels as low as 26 dB, so they won’t disturb you, day or night.

  • Small Apartment, Loft, or Bungalow: These compact residences can be heated or cooled with an LG triple zone mini split, provided the air handling units are placed in distinct zones that coordinate with their BTU capacities. Individual zone temperature control, which can be adjusted remotely from your phone or tablet with the ThinQ® smart app, provides extra convenience.

  • Garage, workshop, and mud room: These types of rooms typically aren’t included in a ducted central air network, which makes them suitable for a 3 zone mini split. They may also have different levels of insulation, but that’s no problem for a mini split since each room has its own air handler to customize temperature control per zone.

  • Upstairs level in an older home: Older homes with two or more stories above ground can be difficult to effectively keep cool because heat naturally rises to the top level. An LG 3 zone mini split is a good solution if the upstairs level consists of three rooms or zones. LG air handlers can also Jet Heat or Jet Cool to quickly heat or cool down a space, so you can turn the system off when the space is unoccupied to save on utility costs and easily turn them on when needed.

  • Three Zone Office Suite: Whether freestanding or attached to your home, an office suite with three independent zones could be kept at a comfortable, consistent temperature year-round with a 3 zone mini split system. You can choose from various air handler types, configurations, and BTU capacities to fit the specific space perfectly. 

Although ductless mini splits are designed to be highly energy efficient, factors such as poor insulation, high heat loads, and high ceilings can adversely affect the system’s performance. Areas with these characteristics may need an increased BTU capacity system to compensate for these challenges.

What BTU sizes are available for LG 3 zone mini split systems?

For LG 3 zone mini splits, the available BTU capacities range from 18,000 to 60,000 BTU (600 to 3,000 square feet).

  • 18,000 to 24,000 BTU (600 to 1,500 sq. ft.): Multi-room additions, office configurations needing individual temperature control, three-bedroom layouts, basement suites.

  • 30,000 to 36,000 BTU (1,250 to 2,000 sq. ft.): Large, open-concept living area and standard bedroom; three medium-sized bedrooms; large basement, bedroom, and office. 

  • 42,000 to 48,000 BTU (1,800 to 2,700 sq. ft.): Multi-unit dwellings, large master suites, open-concept living areas.

  • 54,000 to 60,000 BTU (2,500 to 3,000+ sq. ft.): Luxury estates, open-concept commercial spaces, expansive great room and two auxiliary spaces.

It’s imperative to choose the correct BTU capacity for the combined area of the living spaces you need to heat and cool. A system that is too small will run constantly yet fail to reach the target temperature, causing excessive wear on the equipment and poor performance. On the other hand, a system with too much power will frequently short cycle and fail to dehumidify effectively.

How much do LG 3 zone mini split systems cost?

The cost of installing an LG 3 zone mini split system can vary widely, depending on the configuration of air handlers chosen, but generally, it costs between $6,500 and $12,000+, including labor for professional installation.

  • Equipment Cost: Depending on BTU capacity, the cost of an equipment package for one of these systems falls between $4,000 and $7,000. On HVACdirect.com, a 3 zone mini split package usually includes the condenser unit, three air handlers, and wireless remote controls.

  • Installation and Labor Cost: You can expect to pay around $2,500 to $5,000 to have this system professionally installed by a certified HVAC contractor.

  • Operation and Maintenance Cost: It typically costs between $600 and $1,000 annually to run an LG 3 zone mini split. Maintenance costs total around $150 to $300 for annual inspection and cleaning by an HVAC contractor.

You’ll also need to purchase critical accessories for your new system, including line sets for each air handler, mounting hardware for the condenser, and a disconnect box for the electrical connections. All together, these can cost between $450 and $800 for a 3 zone mini split.

Can I install an LG 3 zone mini split system myself?

No, you must hire a professional HVAC contractor to set up your system because LG does not produce a 3 zone mini split system compatible with homeowner installation.

  • DIY Installation: This self-install is prohibited, not only because LG does not make DIY systems, but also because you must be certified to handle refrigerants in their standard professional-grade mini splits. Attempting to install it yourself will likely void your standard system’s manufacturer warranty.

  • Professional Installation: A certified HVAC contractor can set up your new LG system safely and reliably. You can also gain additional benefits by hiring an LG Pro Contractor, including eligibility for an exclusive 12-year limited warranty on parts and compressors for residential or light commercial HVAC systems.

Prior to installation, you’ll need to make sure you comply with all local/municipal building codes and obtain any necessary permits. Your contractor may help you with this.

What indoor unit styles are available for LG 3 zone mini splits?

LG mini split systems can use any combination of five different air handler types: wall mount, ceiling cassette, concealed duct, floor mount, or one-way ceiling cassette:

  • Wall Mount: These air handlers are mounted high on walls and are the most common choice for mini split applications. LG wall mount indoor units come in a variety of sizes and styles, including sleek, modern designs such as the ARTCOOL® gallery, a picture-frame style air handler that lets you display custom wall art.

  • Ceiling Cassette: A discreet, low-profile option, ceiling cassettes are mounted in the ceiling and provide even, centralized air distribution. LG ceiling cassettes come with four-way controlled louvers that direct airflow in all directions. They’re available in both standard heat pump and LGRED® (reliable heating down to -13°F) models.

  • Concealed Duct: Concealed duct air handlers distribute air fed through short, flexible duct runs into register vents placed flush in the ceiling or on a wall. They are virtually invisible from the interior of the living space, except for a decorative grille.

  • Floor Mount: Also called low wall consoles, floor mount air handlers are located slightly above floor level and have a similar appearance to radiators. They are ideal for spaces with little vertical wall space that cannot accommodate wall mount heads.

  • One-Way (or Slim) Ceiling Cassette: This type of air handling unit is similar to a ceiling cassette but is specifically adapted for a smaller footprint. It can fit between standard ceiling joists and only distributes air in one direction.

Depending on your room/zone configuration for your 3 zone mini split, you can choose any combination of air handler types to fit your space best. Just make sure that the BTU capacities of each unit match up with your condenser unit’s total BTU capacity.

What power requirements do LG 3 zone mini split systems need?

Mini split systems of this size all require similar electrical components to operate safely and effectively, including the correct voltage capacity, amperage, and breaker size, disconnect box, and wiring size:

  • Voltage: A 3 zone mini split needs a 208/230V single-phase circuit solely dedicated to running the heating and cooling system.

  • Amperage and Breaker Size: A double-pole circuit breaker with a 25-amp (A) to 45-amp capacity is required to protect the condenser unit’s internal compressor from electrical surges.

  • Disconnect Box: To comply with electrical codes, a disconnect box must be installed within a clear line of sight from the outdoor condenser unit.

  • Wiring Size: 10 AWG or 8 AWG copper wire is necessary to connect the main electrical panel and the disconnect box. For the interconnection between the three indoor air handling units and the outdoor condenser unit, 14/4 AWG wiring is required to carry power and communication signals throughout the system’s electrical network.

It’s imperative and required by all electrical codes to comply with a system’s Minimum Circuit Ampacity (MCA), the capacity of electrical load the system can handle, and the Maximum Overcurrent Protection (MOP), the maximum amperage the condenser unit can safely handle before electrical surge protection kicks in. These limits are stated clearly on the unit’s nameplate, but you’ll need to have a certified electrician verify them before completing any electrical work.

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FAQs about LG 3 zone mini split systems

Yes, these systems are highly efficient and have SEER2 (Seasonal Energy Efficiency Ratio 2) ratings between 20 and 22. This is significantly higher than the average rating of 14 for traditional central air conditioning systems, and it can make a noticeable difference in lowering utility costs.

LG Air Conditioning Technologies, a division of the South Korea chaebol LG Electronics, is the manufacturer of LG mini split air conditioning systems. Since 1968, LG Electronics (formerly known as Goldstar) has been known for producing HVAC products that balance convenience, style, and affordability. Its USA location is in Alpharetta, Georgia.

No, LG does not produce self-install mini splits for homeowners. You must have a certified HVAC contractor complete the installation for you due to legal restrictions on handling refrigerants. Trying to install the mini split on your own will not only endanger you and your equipment, but it will also void the manufacturer’s warranty coverage.

These systems come with a manufacturer’s 10-year warranty on both the parts and the compressor, as long as you register your equipment within 60 days of professional installation. If you hire an LG Pro contractor to do the job, you can extend this warranty to 12 years free of charge.

Almost all LG mini split systems provide reliable heating and cooling in most climates, though a few models are for cooling only. For extremely cold climates, systems with LGREDⓇ (Reliable to Extreme Degrees) heat technology can deliver 100% heating capacity at 5°F and provide continuous heating down to -13°F.

These LG systems normally have a lifespan of 15 to 20 years when installed properly and maintained consistently. Thanks to its patented Gold Fin™ coating, which keeps condenser coils from rusting or corroding, LG mini splits have a proven track record of durability and a long working life. For maximum longevity, have your system inspected and cleaned annually by a professional HVAC contractor.

Yes, these HVAC systems operate at a surprisingly low noise level, even at high capacity. Indoor air handling units run at sound levels as low as 26 to 35 dB, as quiet as a whisper, while the outdoor condenser unit runs at around 50 dB, the noise equivalent of moderate rainfall, thanks to LG’s Dual Inverter Compressor™ technology.

Yes, all LG mini split systems can function as dehumidifiers, with or without air conditioning. In hot, humid summer weather, the system cools and removes moisture simultaneously. Alternatively, you can run the system in “Dry Mode” in milder temperatures when you want to remove excess humidity without over-cooling your living space.

It’s recommended to self-inspect your outdoor condenser unit at least once per season, checking for any leaves or natural debris that may be stuck in the grates. You should also periodically check and clean the air filter every four to six weeks. Many LG mini split systems come equipped with an auto-cleaning feature to eject debris that becomes stuck in the condenser grates.

By design, LG 3 zone mini splits are meant to heat and cool exactly three separate rooms or zones with one air handler serving each space. However, you can use multiple air handlers to keep a large, open space comfortable in a residential or light commercial setting if your system has the appropriate BTU capacity.

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