What No One Tells You About Your HVAC Unit's SEER Rating...

Learn About Our Financing Options Today!

What No One Tells You About Your HVAC Unit's SEER Rating...

SEER rating scale from 8-20, with different colored bar graphs showing the energy savings as you move up in SEER rating number.

Determining Your Air Conditioners SEER Rating

When it comes to choosing a new HVAC unit for your home, there are many factors to consider. One of the most important is the unit’s SEER rating. What is an AC SEER rating, and why is it important? In this article, we’ll explore these questions and more, so you can make an informed decision when it’s time to choose a new HVAC unit.

What is a SEER Rating?

What is the SEER rating on an air conditioner? SEER stands for Seasonal Energy Efficiency Ratio, and it’s a measure of how efficiently an HVAC unit can cool your home over the course of a season. Specifically, it measures the amount of cooling output (in BTUs) that a unit can produce for each watt of energy it consumes. The higher a unit’s SEER rating, the more efficiently it can cool your home.

So, what is a good SEER rating for AC units?

The answer is that it depends. SEER ratings range from 13 to 26. The higher the SEER rating, the greater the efficiency standards of the unit. For example, a unit with a SEER rating of 13 might use 3,000 watts of energy to produce 36,000 BTUs of cooling output, while a unit with a SEER rating of 26 might use just 1,500 watts of energy to produce the same amount of cooling output.

Understanding SEER Ratings: The Range

SEER ratings for HVAC units can range anywhere from a score of 13 to 26 or more. The SEER rating is determined by dividing the cooling output of the unit over the course of a typical cooling season by the total amount of energy consumed during that same period. This ratio gives you the SEER rating of the unit.

Here are some common SEER AC ratings:

  • 13 SEER: We're often asked "What is the minimum seer rating for air conditioners?" In the United States the minimum SEER rating allowed by law is 13 Units, as determined by the department of energy. This rating is generally the least expensive, but they also tend to be the least efficient. (In California the minimum SEER rating is 14, slightly above the rest of the country’s minimum requirements).

  • 14-15 SEER: These units are slightly more efficient than 13 SEER units and are a good option for homeowners on a budget who still want some energy savings.

  • 16-18 SEER: Units in this range are considered high-efficiency and offer significant energy savings compared to lower-rated units. They tend to be more expensive upfront, but the energy savings can quickly make up for the additional cost.

  • 19-21 SEER: These units are among the most efficient on the market and can provide significant energy savings. They tend to be more expensive than lower-rated units, but the long-term energy savings can be significant.

  • 22-26+ SEER: These units are considered ultra-high efficiency and are among the most expensive on the market. They offer significant energy savings and can be a good choice for homeowners who prioritize energy efficiency and are willing to invest in a higher-priced unit upfront.

Why Are SEER Ratings Important?

SEER ratings are important for several reasons. First and foremost, they can have a significant impact on your energy bills. A more efficient unit will use less energy to cool your home, which means you’ll pay less for electricity over the course of the season. Depending on where you live and how much you use your HVAC unit, this could translate into savings of hundreds or even thousands of dollars each year.

But that’s not the only benefit of a high SEER rating. A more efficient unit can also help to reduce your carbon footprint by using less energy and producing fewer greenhouse gas emissions. And because it’s running more efficiently, it’s likely to have a longer lifespan and require fewer repairs over the years.


SEER (Seasonal Energy Efficiency Ratio) and SEER2 ratings are both measures of the energy efficiency of air conditioning and heat pump systems, but they differ in their testing procedures.

SEER ratings are determined by testing the system over a range of outdoor temperatures and averaging the results. The test conditions for SEER ratings are 82°F indoor temperature with 80°F outdoor temperature and 50% relative humidity.

On the other hand, SEER2 ratings are determined by testing the system under a wider range of outdoor temperatures and humidity levels, and taking into account the system's performance during different parts of the day. SEER2 tests are conducted under four different indoor temperature conditions and five different outdoor temperature conditions, with a range of humidity levels.

Because SEER2 ratings take into account a wider range of operating conditions, they can be a more accurate representation of a system's energy efficiency in real-world usage. However, SEER2 testing is more complex and expensive than SEER testing, which is why not all HVAC manufacturers choose to obtain SEER2 ratings for their systems.

How to Choose the Right HVAC Unit Based on its SEER Rating and Your Budget

So how do you choose the right HVAC unit for your home based on its SEER rating and your budget? Here are a few things to keep in mind:

  • Consider Your Climate: If you live in a hot, humid climate where you’ll be using your HVAC unit frequently, it’s worth investing in a unit with a higher SEER rating. On the other hand, if you live in a cooler climate and won’t be using your unit as much, you may be able to get away with a lower SEER rating.

  • Determine Your Budget: HVAC units with higher SEER ratings tend to be more expensive than those with lower ratings, so it’s important to determine your budget before you start shopping. Keep in mind, though, that a more efficient unit will likely pay for itself over time through energy savings.

  • Consider Other Factors: SEER rating isn’t the only factor to consider when choosing an HVAC unit. You’ll also want to think about factors like the size of your home, the type of unit (central air vs. ductless mini-split), and the brand and model of the unit.

  • Consult with a Professional: Finally, it’s always a good idea to consult with a professional HVAC technician before making a purchase. They can help you determine the right size and type of unit for your home, as well as recommend models with the best SEER ratings in your budget range.

In conclusion, the best SEER rating for the money depends on your specific needs and budget. Generally, a SEER rating between 14 and 16 is considered to be a good balance between efficiency and affordability. However, if you live in a very hot climate, you may want to consider a higher SEER rating to help you save money on energy costs over time.