LG HERO Inverter Air Conditioner 1.5 HP, Cooling Only

The fundamental difference lies in how the compressor operates to control the temperature. Non-Inverter air conditioners have compressors that run at a constant speed regardless of the indoor temperature, turning off once the desired temperature is reached and restarting when it rises. In contrast, Inverter air conditioners operate by dynamically adjusting the compressor speed—running faster when the room is warm and slowing down as the temperature drops to maintain a steady climate.

Inverter technology adjusts the compressor’s speed to maintain a constant temperature, reduce energy consumption and improve efficiency. Inverter technology results in quieter operation and greater durability.

In extreme summer climates, selecting the correct cooling capacity is essential for reliable and comfortable performance. As a general guideline, most residential spaces require approximately 1–1.25 HP per 10 m², depending on insulation quality and sun exposure (equivalent to around 900–1,100 BTUs per m²). Rooms with strong sunlight, top-floor locations, high ceilings, or heat-generating devices may require additional capacity.

For a 12–15 m² room, a 1.5 HP (approximately 12,000 BTU) unit is standard, while a 20 m² room typically requires a 2.25 HP (approximately 18,000 BTU) unit to ensure consistent cooling during periods of high outdoor temperatures.