Energy Efficiency of a Fridge: What Homeowners Should Know

Key Points of This Article:

• An older refrigerator can quietly use 35% more electricity than a newer ENERGY STAR-certified energy-efficient model, especially if it runs nonstop in a garage or basement.  

• A more energy-efficient refrigerator can cost as little as $2.88 per month to run, while larger, feature-heavy and less efficient models may cost nearly $10 per month depending on electricity rates and usage. 

• Bottom freezer and top freezer fridges are often the most energy-efficient fridge styles, using as little as 200 to 263 kWh per year compared to 681 kWh for some French door models.  

• Simple habits like cleaning dusty coils, keeping tight door seals, and avoiding overly cold temperature settings can help a fridge run more efficiently without replacing it.  

Your fridge is one of the only appliances in your home that never gets a break. It runs all day, all night, every day of the year. So, if you have ever looked at your electric bill and thought, "How much of this is my fridge?" you are asking a very smart question. 

As an energy supplier for over 35 years, we've seen what affects energy bills for homeowners across the Midwest and what does not. A fridge is a perfect example of an everyday appliance that can quietly increase your monthly costs.  

If you choose the right model, your energy-efficient fridge can save you about 9% on your yearly energy costs. 

In this guide, you'll learn how much electricity a fridge really uses and how it affects your electricity bill, how to compare your current fridge to a newer energy-efficient model, and how to decide whether a few simple changes are enough or if it's time to replace it. 

What Is the Energy Efficiency of a Fridge? 

Energy efficiency for a fridge means how much electricity it uses each year to keep your food cold, and it works by running fewer and shorter cooling cycles to hold a steady, safe temperature. 

ENERGY STAR says an ENERGY STAR-certified fridge is about 9% more energy efficient than a model that only meets the federal minimum standards. This means replacing and properly recycling an older fridge could save homeowners about $150 over the 12-year lifetime of the newer model. 

Your fridge is one of the few appliances in your home that never really gets a break. Because it runs nonstop, even small differences in efficiency can slowly add up on your electric bill over time. 

A more energy-efficient fridge is built to hold the right temperature with less effort, using better insulation, tighter door seals, and smoother-running compressors so it does not need to cycle as often or use as much electricity over time, which helps keep your monthly energy use more under control. 

What Features Make a Fridge More Energy Efficient? 

The most energy efficient fridges have features that help them hold cold air better and run less often, which lowers their kWh per year. Let's take a closer look at the features that usually make a fridge more energy efficient: 

ENERGY STAR Certification 

ENERGY STAR certification is a quick signal that the fridge is built to meet higher efficiency requirements than the basic minimum standard. It usually means the model was designed to use less electricity over the year, which can lower the amount it adds to your monthly bill. 

A Newer Inverter or Variable Speed Compressor 

A compressor is the part that does most of the cooling work. Older compressors tend to switch fully on and fully off, which can waste energy through frequent stop and start cycles.  

A variable speed compressor can adjust its speed based on what the fridge needs, so it runs more smoothly, holds a steadier temperature, and often uses less electricity over time. 

Better Insulation 

Insulation is what helps the fridge keep cold air in and keep warm air out. Better insulation means the fridge loses less cold air through its walls and doors. When it holds temperature longer, it does not need to run the compressor as often, which reduces energy use. 

Tighter Door Seals 

Door seals, also called gaskets, prevent air leaks when the door is closed. If the seal is tight, cold air stays in and warm air stays out. That means the fridge does not have to keep "recovering" from small leaks all day, which can reduce run time and electricity use. 

Improved Airflow Design 

A fridge cools more efficiently when cold air can circulate evenly. Improved airflow helps prevent warm pockets in corners and drawers.  

When temperatures stay even throughout the fridge, the unit does not have to run longer cycles to fix hot spots, which helps keep electricity use lower. 

Smarter Defrost Systems 

Defrosting is necessary, but older fridge designs sometimes run defrost cycles on a fixed schedule whether the fridge actually needs it or not.  

Smarter defrost systems help reduce unnecessary defrost cycles, which matters because defrosting can add extra heat and energy use inside the appliance that the fridge then has to cool back down again. 

LED Interior Lighting 

LED lights use 90% less electricity than older bulbs, and they give off less heat. Less heat inside the fridge means the cooling system has less work to do, which supports better efficiency over time. 

If you are comparing fridge models, these features all support the same goal: helping the fridge hold a steady, safe temperature while using less electricity in everyday use.  

Factors That Affect a Fridge's Efficiency 

A fridge can be energy efficient on paper and still uses more electricity in real life if the home setup and daily habits make it work harder. 

A fridge's actual energy use depends on how often it needs to run to stay cold throughout the day. The more heat it has to fight and the colder air it loses, the longer the cooling system will run and the more electricity it will use over time. 

Here are the most common real-life factors that can reduce a fridge's efficiency: 

Placement and Surrounding Conditions 

Where your fridge sits matters because heat, cold, and poor airflow can make it run longer to stay cold. A fridge in a warm, cramped spot works harder, and garage or basement fridges often use more electricity because temperatures swing more, and dust buildup can reduce performance. 

Temperature Setting 

When the fridge is set colder than it needs to be, it uses more electricity. Colder settings do not usually protect food better. They simply create a lower target temperature, which means longer run time and more cycling. 

Door Habits 

How often the door is opened matters more than many homeowners realize. Every time the door stays open, cold air spills out and warm air rushes in. If the fridge is opened often during cooking or meal prep, it has to work harder to recover. 

Airflow Inside 

A fridge needs air circulation to cool evenly. When vents are blocked or the fridge is packed too tightly, cold air cannot move properly. That can create warm spots that make the compressor run longer to compensate. 

Hot Food 

Putting warm leftovers straight into the fridge raises the inside temperature. The fridge then has to spend extra energy pulling that heat back out. Letting food cool a bit first can reduce that extra workload. 

Coils 

Dirty condenser coils can quietly increase energy use. Coils covered in dust act like a blanket, which makes it harder for the fridge to release heat. When it cannot release heat efficiently, it runs longer and uses more electricity. 

Whether You Have a Second Fridge 

A second fridge is a quiet bill booster in many Midwest homes. It runs 24/7 just like the main fridge, and it is often older and less efficient. Even if it is only used for drinks or overflow food, it can add a noticeable amount of electricity use over the course of the year. 

What Is the Ideal Temperature for an Energy Efficient Fridge? 

The ideal temperature of an energy efficient fridge is 37°F to 40°F for the fridge and 0°F for the freezer because this range keeps food safely cold while minimizing unnecessary compressor run time and electricity use. 

This temperature range is cold enough to prevent bacterial growth and keep food fresh, but not so cold that the fridge has to work overtime. When the setting is lower than needed, the compressor cycles more often and runs longer, which increases energy use without improving food safety. 

Going colder can also create practical problems around the fridge. Food near the back may accidentally freeze, produce can spoil faster from ice crystals, and the freezer may build up extra frost over time. All of that can make the appliance work harder and use more electricity than necessary. 

What Are the Types of Energy-Efficient Fridges, and Which Style Uses the Least Electricity? 

According to Consumer Reports, top freezer and bottom freezer fridges are often the most energy efficient styles because they generally cost less to operate than larger side-by-side or French door models.  

Here are the most common types of energy efficient fridges you may see when comparing different options: 

Top Freezer Fridge

The freezer is on top and the fridge section is below. This design is usually simpler and often has fewer added features, which helps keep electricity use lower. In many cases, this style has one of the lowest yearly kWh ratings and tends to cost less to run. 

Bottom Freezer Fridge

The freezer is on the bottom with the fridge section on top. This layout is popular for convenience and can still be very efficient, especially in standard-sized models. Bottom freezer units are often among the lowest in electricity use while offering more ergonomic access to fresh food. 

Side-by-Side Fridge

The fridge and freezer are positioned next to each other. These models typically have more features and a larger footprint, which can increase yearly electricity use. Built-in ice makers and water dispensers also add to overall energy consumption. 

French Door Fridge

French door models have two doors on top for fresh food and a pull-out freezer drawer below. They are often larger and include more advanced features. While they can still be energy efficient, they typically use more electricity per year than simpler top or bottom freezer designs. 

The key takeaway is simple because fridges with simpler layouts and fewer added features tend to use less electricity, while larger and more feature-rich designs usually require more energy to run. 

We recommend to always check the "kWh per year" on the EnergyGuide label to compare specific models. 

How Much Electricity Does an Energy-Efficient Fridge Use? 

An energy efficient fridge typically uses between 200 and 681 kWh per year, depending on its size and style. 

That equals about 17 to 57 kWh per month, which gives you a clearer picture of how much your fridge adds to your total monthly electricity use. 

Even though a fridge may not be the largest appliance in your home, it runs all the time, so that steady monthly usage becomes part of your baseline energy cost.

How Much Does It Cost To Run an Energy-Efficient Fridge? 

Powering an energy efficient fridge typically costs between $2.88 and $9.82 per month, depending on the style, based on the December 2025 average electricity rate of 17.30 cents per kWh. 

By comparison, an older or less efficient fridge may cost about $1.17 to $2.68 more per month to run than an energy-efficient model at the same electricity rate. 

While that may not sound like a huge difference at first, fridge style and size can quietly affect electricity use over the years since fridges run nonstop every day. Take a look below to see how the estimated running costs compare between common energy efficient fridge styles:

In this comparison, the bottom freezer and top freezer styles cost the least to operate each month, while the French door style costs the most. 

The difference may look small month to month, but over a full year the gap becomes more noticeable.  

If you're deciding between styles, this is really about what you want to pay month after month. Smaller, simpler designs usually keep your operating costs lower, while larger models with more features tend to cost more to run over time. 

How Does the Energy Efficiency of a Fridge Impact Your Monthly Bill? 

The energy efficiency of a fridge impacts your monthly bill by adding between 16.67 and 56.75 kWh per month, depending on the style and size. 

Because your fridge runs all day, every day, it becomes part of your home's baseline electricity use. Even when the lights are off and everyone is asleep, your fridge is still cycling on and off to keep food at a safe temperature. That steady use shows up on your bill month after month. 

For example, a bottom freezer model may use about 16.67 kWh per month, while a French door model may use about 56.75 kWh per month. That is a difference of 40.08 kWh each month between two common styles. Over a year, that difference adds up in total electricity use. 

Here is a simple real-life scenario. Imagine two similar households that both cook at home regularly, run laundry a few times a week, and keep the thermostat at the same setting. The biggest difference is the fridge.  

One home has a smaller bottom freezer model, while the other uses a larger French door fridge with more storage space and extra features. Even if everything else stays the same, the second home will naturally use more electricity each month simply because that fridge requires more energy to run. 

Upgrading to a more efficient fridge can lower your steady monthly usage, but your overall bill will always depend on the whole home and how it is used. 

How Does a Fridge Compare to Other Appliances on Your Energy Bill? 

A fridge uses much less electricity per day than major appliances like heating and cooling systems, but because it runs 24 hours a day, it becomes part of your steady monthly baseline. 

To understand its impact on your bill, it helps to compare its daily electricity use to other common appliances. Let's take a closer look at the chart below to see which items create short bursts of high usage and which ones quietly add steady usage over time. 

Are New Fridges More Energy Efficient? 

Yes, new fridges are generally more energy efficient than older ones because newer models are built to meet tighter federal efficiency standards and use improved cooling designs that reduce total electricity use over the year.   

For homeowners, the biggest difference shows up when you are replacing an older unit. The U.S. Department of Energy notes that an old fridge can use about 35% more energy than a newer model that has earned the ENERGY STAR label, and keeping an old fridge as a second unit can quietly raise your household electricity use.  

The simplest way to confirm "more efficient" for your specific situation is to compare the "kWh per year" number on the yellow EnergyGuide label between models you are considering and what you own now. 

Energy Efficient Fridge vs Old Fridge: Is It Worth Replacing? 

It is usually worth replacing your fridge if it is older, running constantly, or using far more electricity than newer models, but not every situation requires an upgrade. 

Here is a simple way to think about it. 

Consider Switching to a New Fridge If… 

• Your fridge is 12 years old or older. Older units were built under less strict efficiency standards and typically use much more electricity. 

• It runs almost constantly or feels hot on the sides. 

• You notice rising electricity use and cannot explain it with heating or cooling changes. 

• It struggles to hold steady temperature or has frequent frost buildup. 

• It is a second fridge in the garage or basement that is rarely full but runs 24/7. 

Newer energy efficient models are built with better insulation, tighter seals, and more efficient compressors. Over time, they use significantly less electricity, especially compared to older units from the early 2000s or before. 

Consider Keeping Your Current Fridge If… 

• It is less than 10 to 12 years old and working properly. 

• It maintains temperature without constantly running. 

• Your door seals are tight and coils are clean. 

• Your monthly energy use is stable and does not show unusual spikes. 

Replacing a fridge just because it is not brand new does not always lead to dramatic savings. The biggest difference usually shows up when replacing a much older unit. 

What really matters is knowing when a fridge is simply using more electricity than it should. If your fridge is older and starting to show signs of inefficiency, upgrading to a newer model may help lower your everyday electricity use. But if it is still relatively new and running well, simple maintenance and good habits may be enough to keep it efficient for now. 

What Does the Future of Energy Efficient Fridges Mean for Your Home? 

Newer fridge models are designed to use electricity more carefully, hold temperature more steadily, and reduce environmental impact over time. 

According to Future Market Insights, from 2025 to 2035 fridges are expected to include more AI-powered automation, improved cooling technologies, and more sustainable materials.  

AI features can help a fridge adjust cooling levels based on how often the door is opened or how full the fridge is, instead of running at the same intensity all the time. This can help reduce unnecessary energy use. 

Manufacturers are also improving refrigerants, which are the substances inside the fridge that move heat out. Green America reports that better refrigerant management could reduce global carbon emissions by 89.74 gigatons of CO₂ equivalent by 2050, making it one of the most impactful climate solutions available. 

For homeowners, this means newer fridges are not only using electricity more efficiently but also reducing environmental impact at the appliance level.  

FAQs 

Are small fridges more energy efficient?

Small fridges usually use fewer total kilowatt-hours per year than larger models, but true efficiency depends on the kWh per year rating rather than size alone. 

When should you replace your fridge?

Consider replacement if your fridge is 12 years old or older, since older units often use much more electricity than modern ENERGY STAR models. 

The energy efficiency of a fridge comes down to understanding how many kilowatt-hours it uses each year, what that means for your monthly bill, and whether simple maintenance or a replacement makes more sense for your home. Now you know how to read the label, estimate monthly usage, and spot quick fixes that can reduce wasted electricity. 

For Midwest homeowners, this matters because many homes have older kitchen units or second fridges in garages and basements that quietly add to monthly usage. Small improvements can lower your steady baseline, but your overall bill still depends on how your entire home uses energy throughout the year. 

Once you understand your usage, the next step is thinking about long-term stability. If predictable supply charges and easier budgeting matter to your household, you may want to explore options like Santanna's Unlimited Energy plan, designed to help avoid surprises during high-usage months and support steady planning over time.* 

* Restrictions apply. Enrollment based upon program eligibility. Customers using more than 125% of normal monthly usage as determined by Santanna may be required to switch plans.