What can be an advantage of using programmable thermostats in HVAC systems?

Using programmable thermostats in HVAC systems allows for temperature settings to be adjusted for efficiency, which is a significant advantage. These thermostats can be programmed to automatically adjust the temperature based on the time of day or the occupancy of a space. For example, they can lower the heating or cooling output during the hours when the building is unoccupied, leading to energy savings and optimized comfort levels.

This capability not only enhances energy efficiency but also reduces utility costs over time. Instead of constantly adjusting temperatures manually, a programmable thermostat can maintain ideal conditions based on pre-set schedules, leading to more consistent comfort and less energy waste. Overall, this feature contributes to a more sustainable way of managing energy in residential and light commercial buildings.

The other options do not align with the primary benefits of programmable thermostats. While manual adjustments may be reduced, the focus on efficiency is a core advantage that distinguishes programmable thermostats from traditional manual ones.