Single-zone air conditioning refers to an HVAC system designed to cool or heat one specific area or "zone" within a building. Typically, this system comprises one outdoor unit connected to a single indoor unit, and it's controlled by a single thermostat. This kind of setup is ideal for smaller spaces or single rooms where a consistent temperature throughout the zone is desired.

A single-zone HVAC system works by providing heating or cooling to one specific area or room within a building, controlled by a single thermostat. This system typically consists of two main components: an outdoor unit (containing the compressor and condenser) and an indoor unit (such as an air handler or a furnace with an evaporator coil), connected by refrigerant lines.

A single-zone system has one outdoor unit connected to one indoor unit, and it controls the temperature in one specific area or zone. This setup is simple and typically used in smaller spaces or homes where uniform temperature throughout is acceptable.

Multi-zone system involves one outdoor unit connected to multiple indoor units, each serving a different area or zone within the building. Each of these zones can be controlled independently, allowing for different temperature settings in each area.