The LG AH09S1S 2.5kW High Efficiency Series Inverter Split System Air Conditioner is a premium compact split system designed for bedrooms, studies, apartments, and smaller living spaces. It combines efficient heating and cooling performance with LG’s latest AI comfort technology, advanced airflow control, and built-in WiFi for smarter everyday climate control. Delivering approximately 2.5kW cooling and 3.2kW heating, this model is ideal for small-to-medium rooms that require consistent comfort, low running costs, and quiet operation. It is well suited to spaces around 10–20m², depending on insulation and sun exposure.

Key Features & Benefits

AI Air with LG ThinQ

AI Air technology senses indoor conditions and can adjust airflow direction and operating mode to improve comfort. Through the built-in LG ThinQ app, users can remotely control temperature, timers, and schedules from a smartphone.

Dual Vane Airflow System

LG’s Dual Vane design helps direct air further and faster throughout the room for more even temperature distribution. It can provide stronger reach while improving comfort in both cooling and heating modes.

High Energy Efficiency

This model is positioned in LG’s high-efficiency range and carries a strong energy rating, helping reduce electricity usage during regular operation. Combined with inverter compressor technology, it maintains temperature efficiently with lower power draw.

Soft Air Technology

Once the desired room temperature is reached, Soft Air mode changes to indirect airflow to maintain comfort without harsh direct drafts. This is ideal for bedrooms or long daily use.

Built-in WiFi Connectivity

WiFi is integrated directly into the unit, allowing remote access, energy monitoring, scheduled operation, and multi-user control without additional accessories.

One-Click Scheduled Cleaning

Includes LG’s internal cleaning and drying cycle to help reduce moisture build-up inside the system, keeping coils cleaner and helping minimise odours.

Plasmaster Ionizer+

Features LG’s air purification technology designed to help reduce airborne particles and improve indoor freshness while the system operates.

Comfort Humidity Control & Window Open Detection

The system can assist with humidity management and, through ThinQ functions, detect open windows to help improve operating efficiency.

Quiet Operation

Designed for low-noise everyday use, making it suitable for bedrooms, nurseries, studies, and apartments where quieter performance is preferred.

R32 Refrigerant for Improved Efficiency

Uses modern R32 refrigerant, offering improved efficiency and lower environmental impact than older refrigerants.

Ideal Applications

• Bedrooms
• Home offices
• Apartments and units
• Small living rooms
• Nurseries
• Guest rooms

Why Choose the LG AH09S1S?

The LG AH09S1S 2.5kW is an excellent choice for buyers wanting a premium small-room split system with advanced features. It combines smart app control, AI comfort settings, excellent efficiency, quiet operation, and strong year-round heating/cooling performance. Ideal for users who want more comfort and smarter energy management than a standard entry-level model.