LG WS12TWS

The LG WS12TWS is an Australian-reference wall-mounted inverter split system with 3.4 kW rated cooling capacity and 4.0 kW rated heating capacity. The details below refer to the exact regional model.

Model Identification

Manufacturer: LG
Model / matched system: WS12TWS
Series: Smart WS Series
Product type: Reverse-cycle wall-mounted split-system air conditioner
Reference market: Australia

Technical Specifications

Rated Cooling Capacity3.4 kW

Rated Heating Capacity4.0 kW

System TypeAir-to-air reverse-cycle split

Inverter ControlYes

ConnectivityBuilt-in Wi-Fi / ThinQ

RefrigerantR32

Manufacturer Product FamilySmart WS Series

Country-specific referenceAustralia

Features and Controls

Built-in Wi-Fi / ThinQ
R32 refrigerant
220–240 V 50 Hz single phase

Installation and Compatibility

Confirm the indoor and outdoor model pairing, available electrical supply, minimum clearances, line-set limits, refrigerant compliance and cooling/heating performance at the location’s design outdoor temperatures. Qualified refrigerant handling and electrical installation are required where applicable.

Air-quality clarification: A heat-pump split system normally recirculates room air. An optional filtration or air-treatment feature does not establish a measurable outdoor-air ventilation rate. Manufacturer claims for air treatment must be assessed independently of CO₂ ventilation monitoring and measured particulate removal.

Specification Scope and Sources

Cooling and heating capacities are manufacturer-rated values for this exact reference, not a guarantee of performance in every climate. Regional variants can have different performance, controls, ratings or availability. This profile intentionally omits figures such as noise and seasonal efficiency unless the model-specific data can be documented.

Official Manufacturer Documentation

LG Australia technical product page, specifications and regional resources.

View Official Product Specification →

Verified source reviewed 11 October 2026. AirAlign is an independent educational resource and is not affiliated with LG.

WS12TWS — heating/cooling asymmetry

LG WS12TWS is listed at 3.4 kW rated cooling and 4.0 kW heating, both higher than WS09TWS’s 2.6/3.2 kW values. These are manufacturer nominal rating conditions rather than guaranteed output at every summer/winter design temperature. Confirm room sensible/latent load and the actual indoor/outdoor label before selecting a larger inverter system. Verify indoor unit dimensions, refrigerant piping, sound data and app/network functions for the regional suffix.