If you’ve ever gone shopping for an air conditioner, you might have noticed a yellow sticker on the side of the condenser. This sticker contains the SEER and EER ratings. These numbers measure the air conditioner’s energy efficiency, and while they seem alike, they’re actually very different.

In this article, we’ll take a look at the differences between SEER and EER ratings, and how you can use them to help you decide which unit to buy.

What is the SEER Rating?

The Energy Efficient Ratio (EER) or the Energy Efficiency Rating measures the energy efficiency of an air conditioner at a fixed temperature. In calculating the EER, the outdoor temperature is set at 95 °F while the indoor temperature is at 80 °F with 50% humidity. Essentially, the EER provides the user with a “snapshot” of the unit’s cooling efficiency.

What is the EER Rating?

The Energy Efficient Ratio (EER) or the Energy Efficiency Rating measures the energy efficiency of an air conditioner at a fixed temperature. In calculating the EER, the outdoor temperature is set at 95 °F while the indoor temperature is at 80 °F with 50% humidity. Essentially, the EER provides the user with a “snapshot” of the unit’s cooling efficiency.

Which Rating is More Important, SEER or EER?

As a rule of thumb, the higher the SEER/EER rating, the more energy-efficient the air conditioning unit. The SEER and EER ratings go hand-in-hand, meaning that a high SEER would mean that the unit also has a high EER.

However, some units may have different SEER and EER ratings. When that happens, here is what you need to remember:

• EER ratings measure the energy efficiency of an air conditioner in extremely warm climates. It assumes that the unit is constantly running at peak capacity. If you live in an area where the outside temperature is 95 °F or higher, the EER is more important than the SEER.
• SEER ratings determine the energy efficiency of an air conditioner during a specific season. Refer to the SEER if you live in an area that experiences different seasons, specifically summer and fall.

Why are SEER and EER Ratings Necessary?

Aside from checking an air conditioner’s size, BTU capacity, and so on, it’s crucial to look at the SEER and EER ratings when deciding on which unit to buy. Here’s why:

• Energy Savings. The higher the SEER/EER rating, the more energy-efficient the unit. As a result, you’ll benefit from reduced energy bills every month.
• Efficient Cooling. In general, air conditioners with high SEER/EER ratings offer better cooling power.
• Long Lifespan. Air conditioners with high SEER/EER ratings may be expensive but they tend to be made of better materials and technologies. Hence, you won’t have to take them in for repairs every year.

The Bottom Line

The next time you go shopping for a new air conditioner, don’t forget to check the SEER and EER ratings. It’s one way of reducing your energy bills while enjoying comfortable cooling at the same time.

If you need help understanding the SEER and EER ratings, consider calling a professional HVAC technician or HVAC company. They can help find the best air conditioner for your home.