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Residential Heating and Air Conditioning Blog

What SEER2 Means for Getting a New AC


Understanding SEER ratings is crucial when upgrading your air conditioning system. SEER, which stands for Seasonal Energy Efficiency Ratio, is a metric that measures the efficiency of air conditioners. The higher the SEER2 rating, the more energy-efficient the AC unit is. Let’s learn more about SEER2 and why it’s essential to consider when looking for a new AC installation in St. Paul.

What Is SEER2?

SEER2 is an enhanced version of the SEER rating system that considers more factors to represent an air conditioner’s energy efficiency accurately. While the original SEER ratings only considered the energy used during cooling, SEER2 reflects real-world performance and energy usage. This means SEER2 offers a more comprehensive view of how efficiently an AC unit operates across different scenarios, not just at maximum capacity.

Why SEER2 Matters

Energy Savings: One primary reason to consider SEER2 when getting a new AC system is the potential for energy savings. Higher SEER2-rated units consume less energy, lowering utility bills over time. This is especially beneficial in regions with long cooling seasons or high electricity rates, especially during the St. Paul summers.

Environmental Impact: Energy-efficient AC units with higher SEER2 ratings contribute to reducing greenhouse gas emissions. By choosing a system with a higher SEER2, you’re saving money and reducing your carbon footprint.

Long-Term Cost Benefits: While high-efficiency AC units with higher SEER2 ratings may have a higher upfront cost, the long-term savings on energy bills often outweigh the initial investment. Over the system’s lifespan, you can recoup the upfront costs through lower energy expenses.

Comfort and Performance: AC units with higher SEER2 ratings typically offer better performance and more consistent cooling. They can maintain desired indoor temperatures more efficiently, enhancing occupants’ comfort.

Factors Affecting SEER2 Ratings

The following factors can influence the SEER2 rating of an air conditioning system.

Equipment Efficiency

The efficiency of the components, such as compressors, coils, and fans, contributes significantly to the SEER2 rating. Advanced technologies and design improvements in newer AC units often lead to higher SEER2 ratings.

Size of the Unit

Proper sizing of the AC unit is crucial for achieving optimal efficiency. Oversized or undersized units can lead to energy waste and reduced SEER2 performance.

Installation Quality 

The installation process ensures the AC system operates at its rated efficiency. Proper installation, adequate insulation, and sealed ductwork maximize SEER2 performance.


Regular maintenance, including cleaning or replacing filters, checking refrigerant levels, and inspecting components, is essential for preserving the efficiency and SEER2 rating of the AC unit.

Choosing the Right SEER2 Rating

When selecting a new AC unit based on SEER2 ratings, consider the following factors:

  • Your region’s climate influences the ideal SEER2 rating for your AC unit. Warmer climates may benefit more from higher SEER2 ratings due to longer cooling seasons.
  • Evaluate your typical usage patterns, including how often you use the AC and at what temperatures. This information can help determine the appropriate SEER2 rating for your needs.
  • While higher SEER2-rated units offer greater energy savings, they often come with a higher upfront cost. Balance your budget considerations with long-term energy savings to find the most cost-effective option.
  • If reducing energy consumption and environmental impact is a priority for you, prioritize AC units with higher SEER2 ratings, even if they require a higher initial investment.

Understanding what SEER2 means for getting a new AC is essential for making an informed decision. Higher SEER2 ratings indicate greater energy efficiency and cost savings, among many other benefits. Choosing a high-efficiency system allows you to enjoy reliable cooling while minimizing energy consumption and operating costs in the long run. If you want to upgrade your St. Paul home’s air conditioning, then it’s time to contact us. Our team will help determine the best system based on your home’s specific needs, offering you the most comfort for your money. 

Rely on Residential Heating and Air Conditioning, and you’ll “Feel the Difference”! Serving The Twin Cities Since 1991.

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