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How to Find SEER Rating on AC Unit


When it comes to cooling your home efficiently, the Seasonal Energy Efficiency Ratio (SEER) rating of your air conditioners or heat pumps is critical. 

SEER ratings help homeowners gauge the energy efficiency of their AC systems, which can translate into significant cost savings and environmental benefits. This is especially important in high-temperature areas where heat waves surge during hot summer months.

However, many homeowners are unsure how to find the SEER rating on their ACs. In this article, we will guide you through the process of locating and understanding the SEER rating on your air conditioner.

What is the Seasonal Energy Efficiency Ratio Rating?

SEER stands for Seasonal Energy Efficiency Ratio. The SEER is a vital metric that measures the energy efficiency of an HVAC system or heat pump. It represents the cooling output of an AC unit divided by the energy it consumes in watt-hours.

In simpler terms, SEER tells you how effectively your AC unit cools your home relative to the energy it uses. The higher the SEER, the better the capability of the AC system is, and the more potential savings there is.

How Do I Find My Aircon’s SEER?

Finding the system’s SEER rating on your air conditioning unit is relatively straightforward:

Check the Nameplate or Data Plate

Start by examining the nameplate or data plate on your AC unit. This plate is usually located on the exterior condenser unit or inside the indoor air handler or furnace for split systems. Look for a label or yellow sticker labeled “Energy Guide” that details the unit’s specifications (model and serial number).

Locate the SEER Rating

You should find a number near the model number on the label or sticker near the condenser or sides, followed by “SEER” or its whole name. This numerical value represents your AC unit’s SEER. If there’s no sticker or a model number, look for a paper near the air handler. 

Refer to the Owner’s Manual

If you need help locating the SEER on the nameplate or if it’s not legible, consult the owner’s manual that came with your air conditioner. The manual typically contains comprehensive information about your unit’s specifications, including the SEER rating.

Contact the Manufacturer

Contact the manufacturer’s customer support if you still need help finding the SEER. They can assist you in identifying the SEER rating based on your AC unit’s model and serial number.

What is a Good SEER Rating?

A good SEER rating for an air conditioning system can vary depending on your climate, budget, and energy needed to save money. The minimum SEER rating for new residential air conditioning in the United States is 14. Like many countries, the Philippines has no specific SEER rating requirement for a new cooling system.

Here are some general guidelines to help you determine what might be the best SEER rating for your specific situation:


If you live in a region with a hot and humid climate, like the Philippines, where your air conditioner’s cooling system frequently runs throughout the hot season, a higher SEER rating can be particularly beneficial. A SEER rating of 16 or higher is often recommended for such climates, as it can lead to more substantial energy savings, even when your cooling system is frequently running.


Higher SEER-rated air conditioning systems tend to come with a higher upfront cost. Consider your budget and weigh the initial investment against long-term energy savings. The best SEER rating should provide a balance between efficiency and cost-effectiveness.

Long-Term Goals

If you plan to stay in your current home for many years, investing in a higher SEER-rated system can pay off in the form of lower energy bills over time. On the other hand, if you expect to move in the near future, a slightly lower SEER rating may be acceptable.

Environmental Impact

If reducing your carbon footprint and energy consumption is a priority, then a higher SEER-rated system is a good choice. These systems are more energy-efficient and can help reduce greenhouse gas emissions.

Utility Incentives

Check if your local utility company offers incentives or rebates for installing high-efficiency air conditioning systems. These incentives help offset the initial cost of a system with a higher SEER.

While a SEER of 14 is the minimum standard for new residential AC units in the United States, an above-average SEER rating can range from 14 to 21 or higher, depending on your specific circumstances. It’s important to consider your climate, budget, and long-term goals when determining what SEER rating is right for you. Additionally, consulting with a qualified HVAC contractor can help you make an informed decision based on your unique needs and preferences.

What is the SEER Rating of Old AC Units?

SEER Rating

SEER ratings for older air conditioning systems are generally lower than new air conditioner units. Before 2006, the minimum SEER requirement for residential air conditioners was 12 or less. 

However, it’s important to note that the efficiency standards have evolved over time, and today’s minimum (in the United States) SEER requirement for new installations is 14.

Older air conditioners installed before 2006 have SEER ratings that fall between 6 and 10. Air conditioners from 1992 and older have a total number of 8 or less.  

While these units are less energy-efficient than newer models, they can still provide effective cooling. The main difference when you upgrade to a higher SEER-rated unit is that it can result in significant energy savings over time (electricity, bills)  but may require a larger upfront investment.

Can You Calculate the SEER Rating?

To calculate an air conditioner’s SEER rating accurately is difficult. It’s a complex process involving various factors and testing procedures, compiling performance data over time. They test the heat pump under higher external static pressure to find the specific cooling output.

However, I can provide you with a simplified formula to calculate the SEER of an air conditioner if you have certain key pieces of information.

It is calculated using the following SEER formula below:

SEER = Total Cooling Output (in British Thermal Unit or BTU) / Total Electrical Energy Input (in watts)

To estimate the SEER of your air conditioner, you would need the following information:

  1. Total Cooling Output (in BTU): This is the amount of cooling that your air conditioner provides during a typical cooling season. You would need to measure or find data on how much cooling your AC unit provides in BTUs.
  2. Total Electrical Energy Input (in watts): This is the total amount of electrical energy consumed by your AC unit over the same cooling season in an hour. You can typically find this information on your utility bills, as they often provide data on your kilowatt-hours (kWh) energy consumption. To convert kWh to watt-hours, multiply by 1,000 (since 1 kWh = 1,000 watt-hours).

Once you have these values, you can plug them into the formula to estimate the SEER rating. However, it’s important to note that this estimation may not be entirely accurate because the SEER rating involves more factors, such as the unit’s heating per hour at various temperatures and humidity levels over an entire season. Additionally, it’s influenced by factors like the insulation and size of your home.

For a precise SEER rating, manufacturers conduct standardized tests in controlled conditions to determine the unit’s energy capability. Therefore, it’s often best to rely on the manufacturer’s SEER rating provided on the unit’s nameplate or documentation.

If you’re looking to compare the efficiency of different air conditioning systems, always use the manufacturer’s SEER rating, as it’s a standardized measure that allows for accurate comparisons between models.

Final Thoughts

Knowing how to find the SEER on your AC unit is essential for making informed decisions about energy efficiency and comfort in your home. A higher SEER signifies greater energy efficiency, leading to reduced energy bills and a smaller environmental footprint.

If you’re unsure about your AC unit’s SEER, consult the nameplate, owner’s manual, or manufacturer. Additionally, if you have an older AC unit, consider the potential benefits of upgrading to a more energy-efficient model with a higher SEER to enhance both your comfort and savings.

JP Reyes

JP has been in the aircon industry for almost as long as he has been alive. As a child JP would help his tatay fix aircon units at their junk shop in Cavite. After graduating UP in the early 2000's, JP then started his own Aircon servicing business and within 5 years had 10 shops in 8 different cities. Fast forward to today and JP brings all his experience and expertise online to give readers trustworthy advice and reviews about Air-conditioning buying, servicing, cleaning and repair in the Philippines.

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