The days are turning shorter, vacation is over and kids are headed back to school. How is your household doing when it comes to energy efficiency? Start by answering the following questions. If you fail to pass the test, maybe it's time to make some changes to your energy-using routine.

Do you turn things off when you're not using them?

Your empty house can still waste plenty of energy. Turn off lights and other devices when you're the last person to leave a room or the house for the day. Simple upgrades, such as LED lights, can help. They use up to 75% less energy than conventional incandescent lights.

Do you program your programmable thermostat?

You can save a lot of energy by adjusting the thermostat to match your family's school and work schedule. Why waste energy keeping an empty house comfortable? ENERGY STAR®-certified smart thermostats optimize savings and convenience by automatically adjusting temperatures based on your schedule. You can also take advantage of advanced features, such as remote control.

Do you have your heating and cooling system inspected each year?

Annual HVAC system testing and cleaning is critical for ensuring efficient performance and indoor air quality. Have your system checked by a qualified professional before the start of each season.

Have you changed your HVAC filter lately?

A dirty HVAC filter can block airflow, making your system work harder to keep you comfortable. Change your filter regularly according to manufacturer's guidelines.

Do you take advantage of smart plugging devices?

Electronic devices — such as TVs, game consoles and chargers — continue to draw power even when no one is home to use them. Advanced power strips and smart plugs provide a simple energy-saving solution. They automatically cut power to devices when they're not in use.

Do you use window treatments to block heat gain?

Close window treatments when you leave for the day. This action helps block solar heat gain that gets trapped inside your home. Otherwise, your air conditioning system works harder, even at a higher, energy-saving setting.

Do you open and close the refrigerator door a lot?

As you pack lunches, you may find yourself in and out of the refrigerator a lot. The frequent opening and closing of the door makes the fridge work harder to maintain a consistent temperature and keep things cool.

Take out everything you need at once and close the door quickly. This way, lunch ingredients are easier to access and quicker to pack, saving time and energy.

Have you had a home energy audit?

It's a perfect time of year to consider a home energy audit. Your auditor will inspect your home and provide customized cost-saving efficiency recommendations to help your household pass the test with lower energy bills and increased comfort.