About LG WS18TWS 4.8kW Smart Series Inverter Split System Air Conditioner
The LG WS18TWS 4.8kW Smart Series Inverter Split System Air Conditioner is a superior quality mid-range device with the ability to cool (4.8 kW) and heat (5.9 kW) such as big living and open indoor areas. The main attraction of this device is that it not only provides the most important smart connectivity through Built-in Wi-Fi and the LG ThinQ® App for remote control, but it also comes with the very reliable 10-Year Inverter Compressor Parts Warranty.1 Also, although it is very functional, has Active Energy Control for power management and Auto Clean for basic maintenance, it has the mid-range positioning which results in a relatively low 2.0 Star Cooling rating and hence, higher running costs and a noise level (approx 31dB(A)) that is lower than LG’s premium, quiet-focused models but still quite high.
Key Features and Explanations
| Key Feature |
Explanation |
| Smart Inverter Compressor™ |
The heart of the system. This technology adjusts the compressor speed constantly to maintain the set temperature with minimal fluctuation, resulting in lower power consumption than non-inverter models. LG backs this with a 10-Year Compressor Parts Warranty. |
| Built-in Wi-Fi Smart Control (LG ThinQ® App) |
Allows users to control the unit remotely using a smartphone via the LG ThinQ app. You can turn the AC on, off, change settings, and schedule operation, even when you are away from home. Also integrates with Google Assistant for voice control. |
| Active Energy Control (4-Step) |
A user-selectable feature that lets you limit the maximum power draw in four adjustable steps. This is beneficial for households with limited power supply capacity or those looking to reduce peak-hour electricity consumption. |
| Auto Cleaning |
Automatically runs the fan to dry the internal heat exchanger coil after use. This helps minimize moisture build-up, which reduces the potential for mould, bacteria, and subsequent odours inside the indoor unit. |
| Gold Fin™ Protection |
An anti-corrosion coating applied to the heat exchanger of the outdoor unit. This helps protect the unit from rust and wear caused by corrosive elements like salt air (in coastal areas) or industrial pollution, extending the lifespan. |
| Low Noise Operation |
Achieved through LG’s Smart Inverter Compressor and a unique skew fan design. The unit is engineered to run quietly, with sound levels dropping to approximately $31 \text{ dB(A)}$ in the quietest mode (Sleep/Silent). |
| Comfort Air |
An option that repositions the louvers to direct the airflow away from occupants. This prevents direct, uncomfortable blasts of cold or hot air, enhancing overall comfort. |
Design & Aesthetic Appeal
The LG WS18TWS indoor unit showcases a standard, neat, and functional look that is characteristic of the mid-range Smart Series, with a plain pure white, high-gloss finish and a rather boxy profile with straight edges. Its design is mainly about neutrality and functionality, so it can fit in most room settings without attracting attention; however, it does not have the ultra-slim depth and elegant lines of LG’s premium models. The basic LED temperature display can often be seen through the front panel instead of being completely hidden when not in use.
Technical Specifications
| Feature Category |
Specification |
Value |
Unit |
| Model Numbers |
Indoor / Outdoor Unit |
WS18TWN / WS18TWU |
– |
| Capacity (Rated) |
Cooling / Heating |
4.8/
5.9 |
kW |
| Capacity Range |
Cool Min/
Max |
0.90 /
5.50 |
kW |
| Energy Efficiency |
AEER (Cooling) |
3.27 |
W/W |
| Energy Efficiency |
ACOP (Heating) |
3.50 |
W/W |
| Energy Star Rating |
Cooling / Heating |
2.0 /
2.5 |
Stars |
| Rated Power Input |
Cooling / Heating |
1.46 / 1.68 |
kW |
| Indoor Noise Level |
Sleep Mode (Min) |
31 |
dB(A) |
| Outdoor Noise Level |
Sound Pressure (Rated) |
53 / 55 |
dB(A) |
| Indoor Unit Dimensions |
Width x Height x Depth |
998 x 345 x 210 |
mm |
| Indoor Unit Weight |
Net Weight |
11.9 |
kg |
| Outdoor Unit Dimensions |
Width x Height x Depth |
770 x 545 x 288 |
mm |
| Outdoor Unit Weight |
Net Weight |
34.4 |
kg |
| Refrigerant Type |
Standard |
R32 |
– |
| Max Piping Length |
Installation Limit |
$20$ |
m |
| Pipe Size (Liquid / Gas) |
Standard |
6.35 mm /
12.7 mm |
– |
| Key Features |
Built-in Connectivity |
Wi-Fi (LG ThinQ®) |
– |
| Key Features |
Energy Control |
Active Energy Control (4-Step) |
– |
| Key Features |
Durability Feature |
Gold Fin™ Protection |
– |
| Warranty (Compressor) |
Standard |
10 Years (Parts) |
– |
Strengths & Weaknesses
Strengths (Performance, Warranty, and Value)
- High Capacity for Large Rooms: This unit delivers performance that is superior to that of smaller units by rapidly conditioning large areas such as living rooms and open-plan areas with its 4.8kW cooling and 5.9kW heating.
- Excellent Warranty Security: LG’s 10-Year Inverter Compressor Parts Warranty backs it up, providing long-term assurance on the system’s most crucial component.
- Essential Smart Features: Wi-Fi and control through the ThinQ App are built-in, providing convenience features that are most-wanted (remote scheduling, on/off) without the premium price tag.
- Active Power Management: The Active Energy Control (4-Step) feature is a big plus for users who need to manage or restrict their electricity consumption actively.
- Corrosion Protection: The Gold Fin™ coating on the outdoor unit markedly increases its lifespan, especially if in a harsh or coastal environment.
Weaknesses (Efficiency, Noise, and Advanced Features)
- Low Energy Efficiency: The ratings of 2.0 Star for Cooling and 2.5 Star for Heating are considerably less than LG’s best models. This, in turn, means that the annual running costs will be higher for the lower-rated units with the same capacity compared to the higher-rated ones.
- Higher Minimum Noise Level: The maximum noise level during operation is roughly 31dB(A), which is quite a bit louder than 22dB(A) that can be found in LG’s Deluxe series. This is a disadvantage for quiet bedrooms.
- Basic Air Filtration: The unit typically doesn’t have the advanced Plasmaster™ Ioniser Plus but relies on just standard filtration and Auto Clean, meaning it offers less in terms of air purification.
- Design and Remote: The design is typical and does not have the sophistication and ultra-slim dimensions of top-class units, and the remote control is often without a backlight which is a drawback.
Why the LG WS18TWS is an Excellent Choice?
The WS18TWS is the perfect choice for the consumer who is practical and still wants modern convenience features and at the same time is not willing to pay a premium for maximum efficiency.
For Power and SpaceHigh Power for Larger Spaces:
- The 4.8kW Cooling and 5.9kW Heating capacity is its most remarkable feature. It will not only rapidly and efficiently condition large living rooms, open-plan areas, or combined kitchen/dining rooms but also prevent the unit from running at maximum capacity all the time.
- Reliable Brand, Great Warranty: You get the reliability of the LG brand and the 10-Year Inverter Compressor Warranty which is crucial to securing the long-term functioning of the most expensive component.
For Value and ControlCore:
- Smart Integration: It brings the most valuable smart features—Built-in Wi-Fi and ThinQ App control—already available right from the start. You can set a schedule for it, turn it on from a distance, and use voice commands without needing to buy extra modules.
- Cost-Effective Entry: Its lower Smart Series positioning means that there is a considerably lower upfront purchase and installation cost when compared to 4.8kW units in the premium efficiency bracket.
- Active Power Management: The Active Energy Control gives the user total control over the peak power draw, which is a great help in managing energy tariffs or solar self-consumption.
Summary from LG’s Perspective
The LG WS18TWS 4.8kW Smart Series presents a strong argument for being the best option for the purchase of a new air conditioner that can cool and heat a big open area, and at the same time the buyer is considering the first cost. The unit’s greatness includes not only the very important smart features (Built-in Wi-Fi, ThinQ App remote control), a huge 10-Year Inverter Compressor Warranty, and the user-friendly Active Energy Control feature that helps the user to manage the peak in power consumption, but also the very attractive mid-range price point of the unit (The Unit Only price is often around $1,100 – $1,300 AUD). But, if you are looking forward to the maximum long-term savings or silence, then you better not select this model since its $2.0 \text{ Star Cooling}$ rating will lead to higher annual running costs than premium models and its minimum operational noise of 31dB(A) is too loud even for light sleepers and is a drawback as LG’s higher-tier lines lack the advanced air purification (like the Ioniser) available in the lower tier lines..
LG WH12SK-18 3.5kW Inverter Split System Air Conditioner Price in Australia
The LG WS18TWS 4.8kW Smart Series Inverter Split System is available Australia-wide with expert installation from Aussie Solar Tech, ideal for medium-sized homes.
✔ Competitive pricing
✔ Professional installation by licensed technicians
✔ Flexible payment options available
Approximate unit price: $1,150 – $1,250 AUD (Indoor +outdoor unit)
For installation and full package pricing, please contact Aussie Solar Tech for a tailored quote.Request a free quote today and enjoy whisper-quiet comfort year-round.
More Options from LG:
- LG WS18TWS 3.5kW Smart Series Inverter Split System Air Conditioner
- LG WH24SL-18 7.1kW Inverter Split System Air Conditioner
FAQ
1.The LG ThinQ app won’t connect to the AC for what reasons exactly?
The one which happens most is the Wi-Fi frequency. The LG ACs mostly work only with networks of $2.4 \text{ GHz}$ Wi-Fi (not the cutting-edge $5 \text{ GHz}$ band) during setup. Besides that, you should also check that Mobile Data is deactivated on your smartphone when you’re registering.
2.Wi-Fi signal activation on the AC is done how?
The procedure is slightly different for each case, but normally you have to press and keep the ‘Wi-Fi’ button on the remote for three seconds or use a combination of two buttons (usually those on either side of the temperature down button) until the Wi-Fi light on the indoor unit starts to blink.
3.Will I be able to track this model’s power consumption?
Absolutely. The current power use is shown on the display of the indoor unit just by pressing the ‘Energy Monitoring’ button on the remote. In the app, LG ThinQ® you can check the usage trends for the week or the month.
4.What is Active Energy Control, and how do I use it?
These settings let you control the max power usage in four steps (100%, 80%, 60%,or 40%of normal use) according to your choice. You enable it by continuous pressing of the remote’s ‘Active Energy Control’ button (usually indicated with a person icon or W-shaped symbol). Its purpose is to lessen power consumption during peak times.
