Which HVAC system is most commonly used for heating and cooling residential buildings?

The most commonly used HVAC system for heating and cooling residential buildings is the split-system air conditioning system. This type of system is designed to provide both heating and cooling by utilizing two main components: an indoor unit and an outdoor unit. The outdoor unit typically contains the compressor and condenser, while the indoor unit houses the evaporator coil and fan.

One of the primary reasons for the popularity of split-systems is their efficiency and effectiveness in temperature control. They are capable of cooling spaces during the hot months and can also be equipped with heating elements, such as a furnace or heat pump, making them versatile for year-round comfort. Split-systems are also quieter than many other HVAC options because they keep the noisy components outside the living area.

Additionally, these systems can be installed in various settings, from small homes to larger residential complexes, making them adaptable to different architectural styles and sizes. The flexibility in design and installation is a significant factor in their widespread adoption in residential heating and cooling.

Other options like hydronic heating systems are primarily focused on heating and are less commonly used for cooling. Window units are suitable for smaller areas and do not provide central heating capabilities. Wall-mounted systems may serve specific needs but lack the widespread application and efficiency of split-systems.