Thanksgiving is one of the busiest times of year for appliances. The oven works overtime, the fridge is packed with left­overs, the dishwasher runs on repeat, and the washer and dryer tackle extra loads. All that extra use can make you wonder if an older appliance is still pulling its weight—or if it’s time for a replacement. Aging appliances often waste energy and money, even when they keep running.

Calculating the cost:

Swapping a side-by-side refrigerator purchased between 1993 and 2000 for a more efficient model could save $80 in energy costs per year, according to the ENERGY STAR Flip Your Fridge calcu­lator. Multiply that by the average life ex­pectancy of a refrigerator (14 years), and that equals $1,120 in energy savings. To figure out how much energy your ap­pliances use without tracking devices or a smart plug, look for an online calcula­tor or check the energy efficiency label. The annual energy use is listed in kilo­watt hours. To find the yearly cost, mul­tiply this by the rate on your utility bill. The cost to operate an appliance over its lifetime is usually higher than its pur­chase price, making energy-efficient ap­pliances the smarter choice—even when they seem expensive upfront.

Repair or replace:

If an appliance is nearing the end of its life, weigh the cost of repairing versus replacing. Newer appliances use less electricity and often include more features. For exam­ple, newer refrigerators not only use less energy but also feature snack drawers or partial-access doors. A new air con­ditioner is 20-40% more efficient than a unit installed 10 years ago and may include automatic temperature adjust­ments, multiple air speeds and improved circulation. A new washer and dryer can be significantly more efficient, with larger capacity and small-load options, better cleaning, quieter operation, pre­programmed cycles, less water use and automatic dryness sensors. Black Friday is a great opportunity to up­grade, with many retailers offering steep discounts on energy-efficient applianc­es. These upgrades also keep your home running efficiently and let you focus on what matters this Thanksgiving—spend­ing time with family and friends.