Leaving your air conditioner (AC) running when you're not home is generally safe, but there are several factors you should consider to ensure it is done efficiently and without causing unnecessary energy consumption or wear on the unit.
Energy Consumption: Running your AC when you're not home can lead to increased energy usage, which may result in higher electricity bills. If you're concerned about energy efficiency and cost, you may want to consider using a programmable thermostat or a smart AC system that allows you to set specific schedules for when the AC should be on and off based on your daily routines.
System Maintenance: Regularly running your AC can potentially lead to more wear and tear on the unit. However, modern air conditioners are designed to handle continuous use. To minimize wear, it's crucial to keep up with regular maintenance, including cleaning or replacing filters, clearing debris from the outdoor unit, and scheduling professional inspections at least once a year.
Cooling Efficiency: If you live in a hot climate, your home may become uncomfortably warm if the AC is turned off for extended periods. This could result in the AC having to work harder and consume more energy when you return to cool down the house. If you plan to be away for an extended period, consider setting the thermostat to a slightly higher temperature to maintain some cooling without excessive energy usage.
Safety Considerations: Always ensure that your AC unit is in good working condition and doesn't have any potential safety issues before leaving it running unattended. Check for loose electrical connections, ensure there are no strange noises, and that there are no unusual smells coming from the unit.
As for how long you can leave your AC running when you're not home, it depends on your specific circumstances, such as the outside temperature, the cooling capacity of your AC, the insulation of your home, and your energy budget. In general, many people set their programmable thermostats to turn the AC off or reduce its usage during long absences or when they are away for vacations. However, it's essential to strike a balance between energy savings and maintaining a comfortable environment.
If you have concerns about leaving your AC running while you're not home, consider using a smart thermostat that allows you to control your cooling remotely. This way, you can turn on the AC a short while before returning home, ensuring you arrive to a comfortable environment without wasting energy during your absence.