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Understanding SEER Ratings for AC Units
Understanding SEER Ratings for AC Units
17May 2025

When shopping for an air conditioning unit replacement or evaluating your current system’s performance, you’ll likely come across a handful of familiar numbers like the price, tonnage, and wattage - and then there’s SEER. The Seasonal Energy Efficiency Ratio, or SEER, might not be the first detail you notice on your HVAC system’s spec sheet, but it plays a huge role in how comfortably and efficiently your home stays cool.

In fact, SEER is the number that tells you how hard (or easy) your AC works to keep up during the hottest days of the year - and how much it’ll cost you to do so. In this brief article brought to you by Purified Air, we break down what SEER really means, why it matters, and how understanding it can help you make smarter decisions when it comes to AC repair or replacement.

If you'd rather consult with a trained professional from a reputable HVAC company in Silver Lake, CA, then call or message Purified Air to get in touch with a local member of our team.

Understanding SEER Ratings for AC Units

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Purified Air Heating and Air Conditioning exceeded my expectations with their outstanding service near Highland Park. Roman, the technician who visited my home, was not only highly skilled but also courteous and approachable. He took the time to explain everything in detail, ensuring I understood the work being done and the associated costs. His professionalism and the high quality of his work made the entire experience seamless and stress-free. I highly recommend Purified Air for anyone in need of top-notch HVAC services.

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I recently had my AC repaired by Purified Air Heating and Air Conditioning, and I couldn’t be happier with the service. The technician was prompt, professional, and knowledgeable. They quickly diagnosed and fixed the issue, restoring cool air to my home in no time. I highly recommend their services to anyone in need of HVAC repairs. Thank you, Purified Air, for your excellent service!

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After hearing great things from my neighbor, I decided to try Purified Air Heating and Air Conditioning for a heating system check-up. They did not disappoint. The team was courteous, on time, and very knowledgeable. It’s clear why they came so highly recommended, and I’ll be sharing my positive experience with others in the neighborhood

What Is SEER, Really?

SEER is a measurement of how much cooling your air conditioner provides per unit of energy it uses over an entire cooling season. It’s calculated as the ratio of total cooling output (in BTUs) divided by total energy input (in watt-hours). The higher the number, the better the efficiency.

To put it in real-life terms: Think of SEER like miles per gallon for your car. A higher MPG means your car goes farther with less fuel. Likewise, a higher SEER means your AC cools your space more effectively with less electricity.

What’s a “Good” SEER Rating?

In the past, systems with a SEER of 10 or 12 were common. Today, the U.S. Department of Energy mandates a minimum SEER rating of 14 in many regions. Newer high-efficiency models reach ratings of 20 or higher. Here's a general breakdown of the ratings:

  • 14-16 SEER: Standard efficiency; cost-effective for most homes.
  • 17-20 SEER: High efficiency; better performance and energy savings.
  • 20+ SEER: Premium systems; top-tier energy savings.

If your current system has a SEER below 13 (which is likely if it’s over 10–15 years old), then you could save significantly on your energy bills by upgrading to a more efficient model.

SEER Means a Lot - But Not Everything

While SEER is important, it’s not the only factor to consider when it comes to efficiency and effectiveness. Things like installation quality, ductwork condition, thermostat calibration, and regular maintenance all affect your system’s performance.

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Some homeowners are surprised when their newer unit with a high SEER rating doesn’t seem to perform much better than the old one. This is often due to improper installation or airflow restrictions. Don't test your DIY prowess on your AC installation; let the professionals handle it.

Signs It Might Be Time for an Upgrade

If you're not sure whether to stick with your current system or consider a replacement, here are a few telltale signs to consider:

  • Your energy bills have been steadily increasing.
  • Your AC can't maintain a comfortable temperature.
  • You’ve scheduled multiple AC repair in a year.
  • Your unit is more than 15 years old.

Upgrading to a unit with a higher SEER rating might save you more in the long run than another temporary fix. Plus, with today’s rebates and energy incentives, a high-efficiency system is more affordable than you might think. At Purified Air, we typically recommend a replacement when the cost of repairs exceeds half the price of a new unit.

Call in the Professionals TODAY

Still have questions or concerns? Purified Air is your go-to HVAC company for all things air conditioning. Whether you need your unit inspected or you want a brand new HVAC installed, the dedicated professionals at Purified Air are ready, willing, and able to help. Call or message us today to get in touch.

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