Efficiency
What Is SEER2 and Why Does It Matter?
The short answer
SEER2 is the current efficiency rating for air conditioners and heat pumps — the higher the number, the less electricity the system uses to deliver the same cooling. For Des Moines homeowners who run the AC hard through humid summers, a higher SEER2 can trim cooling costs. The right number depends on how long you plan to stay in the home, how much you run the system, and your budget.
SEER2 in plain terms
SEER stands for Seasonal Energy Efficiency Ratio — it measures how much cooling a system delivers across a season compared with the electricity it uses. SEER2 is the updated version that took effect in 2023, tested under more realistic conditions that better reflect how equipment performs in a real home.
The takeaway is simple: a higher SEER2 number means a more efficient system that costs less to run for the same amount of cooling.
SEER vs. SEER2 — what changed
The test got tougher. Because SEER2 measures performance against higher airflow resistance, the same physical system earns a slightly lower SEER2 number than its old SEER rating.
That means you can't compare an old SEER label directly to a new SEER2 label — a 15 SEER unit and a 15 SEER2 unit are not the same efficiency. When you shop, compare SEER2 to SEER2.
What SEER2 do you need in Iowa?
There's a federal minimum SEER2 that varies by region, and Iowa sits in the northern region. New central air conditioners here generally must meet at least 13.4 SEER2, though a professional can confirm the requirement that applies to your specific equipment.
Above the minimum, higher tiers are available and often pair with comfort features like two-stage or variable-speed operation, which also help control humidity through an Iowa summer.
Does a higher SEER2 pay off?
It can, but the math is personal. The more hours you run the system and the longer you stay in the home, the more a higher SEER2 has time to repay its higher upfront cost. If you run the AC lightly or expect to move soon, a moderate SEER2 may be the better value. Financing can make a higher-efficiency system easier to fit into the budget when the long-term math works.
Common misconception
A higher SEER2 always saves the most money.
The local truth: Savings depend on how much you actually run the system and how long you keep it. A homeowner who plans to move in a few years may never recoup the premium for the top tier, so a moderate SEER2 is frequently the smarter spend.
Frequently asked questions
What's the difference between SEER and SEER2?
SEER2 is the updated rating that took effect in 2023, measured under tougher, more realistic test conditions. The same system scores slightly lower in SEER2 than in old SEER, so only compare SEER2 to SEER2.
What SEER2 rating do I need in Iowa?
Iowa is in the northern region, where new central air conditioners generally must meet at least 13.4 SEER2. Higher tiers are optional. A professional can confirm the current minimum for your equipment.
Does a higher SEER2 mean lower energy bills?
Usually, yes — a more efficient system uses less electricity for the same cooling. How much you save depends on your runtime, your electricity rate, and how long you keep the system.
Find the right efficiency for your Des Moines home
Wondering which SEER2 actually makes sense for how you live? Our team can run the numbers for your home and explain the trade-offs — and financing keeps a higher-efficiency upgrade within reach.