What is the impact of oversizing an HVAC system?

Oversizing an HVAC system can have significant negative consequences. When a system is too large for the space it serves, it tends to cool or heat the area more quickly than necessary. This rapid and frequent cycle of turning on and off is known as short cycling. Short cycling causes the system to use more energy than needed, which diminishes its overall efficiency and can lead to higher utility bills.

Moreover, because the system is constantly starting and stopping, it places additional strain on the components of the HVAC system. This can lead to premature wear and tear, resulting in a shortened lifespan for the equipment, more frequent repairs, and ultimately higher maintenance costs. Therefore, while it may seem intuitive that a larger system would provide better performance, the reality is that proper sizing is essential for optimal function, energy efficiency, and longevity of the HVAC equipment.