What happens if an HVAC system is undersized?

When an HVAC system is undersized, it does not have the capacity to effectively heat or cool the space it serves. This results in inadequate heating or cooling performance, leading to discomfort for the occupants. An undersized system will struggle to reach the desired temperature set on the thermostat and may run continuously, trying to compensate for the lack of capacity. This can create an environment that is either too hot or too cold, failing to meet the comfort needs of those using the space.

Additionally, an undersized HVAC system can lead to issues such as excessive wear and tear, since it operates for longer periods to achieve the desired temperature, which can ultimately reduce the overall lifespan of the system. It is important to size HVAC systems correctly to ensure they meet the heating and cooling requirements of the building while maintaining efficiency.