What is the main difference between a split A/C system and a window unit?

The main distinction between a split A/C system and a window unit lies in their design and installation. A split system consists of two main components: an indoor unit, which is typically mounted inside the living space, and an outdoor unit that is installed outside the building. This configuration allows for improved efficiency and quieter operation, as the noisy compressor is located outdoors.

In contrast, a window unit is self-contained, meaning all components—including the compressor, condenser, and evaporator—are housed within a single unit designed to fit in a window or wall opening. This makes installation simpler but limits the unit to cooling a single room and can result in a noisier operation inside the space.

While energy efficiency, maintenance requirements, and installation costs can vary between these two systems, the fundamental difference lies in how they are structured, with the split system featuring separate indoor and outdoor components. This separation can lead to more effective and efficient cooling solutions for larger areas.