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What is the Key difference between SEER and SEER2?

SEER is an abbreviation for Seasonal Energy Efficiency Ratio, a rating system used to determine the energy performance of air conditioning equipment. The SEER rating is calculated by dividing the system's cooling output by the energy it consumes. The greater the percentage of the SEER rating, the better the system's efficiency, implying it takes less energy to provide the same level of cooling.

SEER2 is an improved version of the original SEER rating system for air conditioners and heat pumps. It has increased the external static pressure requirement for testing, which the Department of Energy has determined to resemble real-world conditions more closely. External static pressure is the sum of all the positive and negative external pressures the blower must contend with, such as air filters, registers, and ductwork friction.

Understanding SEER and SEER2

The U.S. Department of Energy (DOE) changed how SEER ratings are calculated. The former SEER rating system has been in place since 2006. The new system rating, SEER2, considers a broader range of operating conditions and more accurately reflects real-world energy usage.

Due to this new element, an HVAC system's SEER2 rating will be significantly lower than its initial SEER rating. The mandate for manufacturers to use SEER2 testing and new, higher energy efficiency standards took effect last January 1, 2023.

How do SEER and SEER2 compare?

Generally, SEER2 ratings are lower than SEER ratings for the same system. The system is still efficient; instead, SEER2 reflects real-world energy usage more accurately.

● For instance: A system with a SEER rating of 16 has a SEER2 rating of 15.3; therefore, consider this when comparing systems rated using the initial SEER system of ratings to SEER2 systems.

It's also important to note that in 2023, it is illegal in the southern region to install a gas system with a SEER2 rating below 14.3-14.5 or a SEER rating of 15, so be sure to check with your contractor, as there are penalties for the homeowner as well.

What does this suggest for a prospective buyer?

When evaluating different air conditioning systems, if you're in the market for a new system, it's critical to examine the SEER rating and SEER2 rating.
While the SEER2 rating system is similar to the original, knowing the changes and what they mean for your purchase is essential.

At Team Enoch, we're experts in all aspects of HVAC systems, including SEER and SEER2 ratings. We can assist you in picking the most efficient system in terms of energy and cost for your home or company.

Contact us today at or 817-888-8880 ext. 3 for the HVAC department to learn more.
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