What is a likely consequence of neglecting HVAC system maintenance?

Neglecting HVAC system maintenance can lead to increased energy costs. When an HVAC system is not properly maintained, it may become less efficient in its operation. This can occur due to factors such as dirty filters, blocked ducts, or worn components that force the system to work harder to achieve the desired heating or cooling levels. As the system struggles to operate effectively, it consumes more energy, which directly results in higher utility bills.

On the contrary, regular maintenance typically enhances cooling efficiency and can contribute to a longer system lifespan while potentially reducing noise levels. However, neglecting these maintenance activities primarily hampers efficiency, leading to the opposite effect on energy costs.