Do Old AC Units Use More Electricity Than New Ones?

Understandably, you want to get the most out of your old AC before getting a new one. While regularly scheduling AC maintenance services in Gifford, FL, can help, your unit’s electricity consumption will still be a major concern.
Do old AC units use more electricity? Read on as we take a deep dive into your old unit’s energy consumption and what it could be costing you.
How the AC in Your Gifford Home Uses Electricity
Your air conditioner doesn’t directly use electricity to cool your home; the components that power it do. For your unit to provide the cool air you enjoy, it cycles a refrigerant that absorbs the heat from your indoor air, releasing it outside.
The compressor is what cycles this refrigerant between the evaporator and condenser coils, and greatly determines electricity consumption. It’s not the only one, though.
Once the refrigerant has absorbed the heat, your AC still needs to distribute the cool air throughout your home. To do so, it requires a fan system, another component that uses up electricity. Exactly how much electricity is used depends on the fan’s speed and runtime.
There are also external factors to consider. For instance, your thermostat settings, your home’s insulation, and outdoor temperatures matter.
All these factors determine how hard your unit will have to work, and a unit that works harder will consume more energy.
The Energy Efficiency of Aging Air Conditioners
Do old AC units use more electricity? The short answer is yes, an aging air conditioner, even one that is well maintained, will use more electricity than a new one.
Here are the primary reasons why your unit’s energy efficiency suffers a significant decline as it ages.
Wear and Tear
Think about all the Gifford summers your old AC has had to work through, and you’ll understand the amount of wear and tear it has. All of this can take its toll on your unit’s internal components, forcing them to work harder.
It’s no secret; the more work you put your air conditioner through, the higher your monthly energy bill will be.
Aging Compressors
As one of the most crucial parts of your air conditioner, the condition of the compressor matters. Sadly, most compressors begin to experience reduced performance after approximately 12 years of use and start struggling to operate effectively. This struggle will result in higher utility bills.
Outdated Technology
We’ve made significant strides in enhancing the cooling performance of modern air conditioning units. These are, sadly, advancements your old air conditioner has missed out on.
For example, modern AC units feature advanced fan motors and variable-speed compressors that adapt to your real-time cooling needs. This makes them a lot more energy efficient.
Older units, on the other hand, run at the same speed. As a result, operating one will often leave you with wasted energy and high electricity consumption.
Low SEER Rating
Why do old AC units use more electricity? In addition to the reasons we’ve shared, the SEER (Season Energy Efficiency Ratio) rating also comes into play.
SEER ratings let you know your AC unit’s energy demands. The higher the rating, the better the air conditioner's energy efficiency. Unfortunately, due to their outdated technology and failing components, older units often have low SEER ratings.
Can You Improve Your Old AC’s Energy Efficiency?
While an aging AC will use up more electricity, is there a way to make it more energy efficient? Is replacement the only solution?
Installing a new air conditioner is, undoubtedly, the best option. However, there are a few tricks you can do to lower your old unit’s energy consumption.
Regular HVAC maintenance is a necessity. Besides this, you could also try to reduce your unit’s workload. To do so, we recommend:
- Replacing air filters monthly to maintain proper airflow
- Keeping the evaporator and condenser coils clean
- Ensuring vents are unobstructed
- Installing a programmable thermostat
- Using ceiling fans to help circulate the conditioned air

Turn to Gifford’s Trusted Cooling Pros for Energy-Efficient Solutions
Do old AC units use more electricity than new ones? Absolutely! However, there are a few solutions you can implement to make your unit more energy efficient.
At Bates Air & Heat, we’re all about ensuring your unit’s optimal performance. From offering maintenance services to cleaning air ducts, you can trust us to boost your AC’s efficiency. If we feel a replacement is more ideal, we’ll offer the comprehensive installation services you need.
Reach out to us today.












