Is a Higher SEER2 Rating Worth It?

Considerations for Upgrading Your AC System

If you're replacing your home's air conditioning system, you might assume that buying one with a higher SEER2 rating will be worth the investment in the long run. However, your monthly energy savings likely won't compensate for your higher upfront costs over the system's lifespan. In this article, we'll discuss what a SEER2 means—and why a system with a rating of 13.4 or 14 might be the smartest, most cost-effective option for your home.

What is SEER2?

SEER stands for Seasonal Energy Efficiency Ratio, a standard measure of air conditioner and heat pump cooling efficiency created in 1992 by the U.S. Department of Energy (DOE) and the Air Conditioning, Heating, and Refrigeration Institute. It is a standard used by over 300 AC manufacturers across North America. SEER2 is an updated version of the rating system mandated by the DOE in 2023.

How SEER2 is Calculated

SEER2 measures the ratio of total heat removed during the cooling season divided by the total electric energy used by the cooling unit during the same time frame. 

Regulatory Regions

The U.S. Department of Energy has divided the United States into three different regulatory regions: North, Southwest, and Southeast. Minimum SEER2 requirements in the North Region, which includes New Hampshire and Massachusetts, are 13.4 for all residential air systems and 14.3 for heat pumps.

Why a High-efficiency AC System isn't Always Better

While manufacturers market high-SEER2 systems as energy savers, the real-world savings are often minimal compared to the increased upfront and ongoing costs. Here's why:

Higher System Cost

High-efficiency systems can cost thousands more to purchase and install than standard units—and the small savings in your monthly bill may never make up for that difference. The chart below compares the average national purchase cost with the monthly electricity expense and how long it will take to break even.

Source: hvac.com

Possible Ductwork Upgrades

Many high-SEER2 systems require new or upgraded ductwork to operate efficiently. Without it, the unit won't deliver the promised performance, negating your investment.

Costly Repairs

Parts like compressors, condenser coils, and fan motors for high-efficiency units can cost 10–20% more than those for standard systems. That means higher repair costs over the lifetime of the system.

The Smart Choice: SEER2 13.4 or 14

If you're in New England, a cooling system with a SEER2 rating of 13.4 or 14 complies with current regulations, and in most cases, it is the most cost-effective, low-maintenance option available. You'll still enjoy efficient cooling without paying extra for features and upgrades you may not need.

Choosing the Right AC System for Your MA or NH Home

At Main Stream Mechanical, we're here to help you navigate the changing energy efficiency standards and find the best solution for your home and budget. Please contact our team to discuss your options and request a no-obligation proposal.