Buying a heat pump often means staring at labels filled with numbers like SEER2 and HSPF2. Most people know these ratings have something to do with energy use, but not exactly what they mean—or which one matters more for their home.
It gets more confusing when the numbers changed recently, making it harder to compare old models with new ones. This guide breaks it down in simple terms so you can understand how these ratings work and why they matter when looking at systems like InverterCool.
SEER2 and HSPF2 are updated energy efficiency ratings for heat pumps and air conditioners. They tell you how much energy your system uses to keep your home cool in summer or warm in winter.
● SEER2 stands for Seasonal Energy Efficiency Ratio 2. It measures how efficiently the system cools over an entire cooling season.
● HSPF2 stands for Heating Seasonal Performance Factor 2. It shows how efficiently the system heats during colder months.
● SEER2 is focused on cooling performance, while HSPF2 measures heating efficiency.
● SEER2 is more important in warmer regions; HSPF2 matters more in colder areas.
● Both ratings help estimate how much energy your system will use year-round.
In January 2023, the U.S. Department of Energy (DOE) introduced SEER2 and HSPF2 to replace the older SEER and HSPF ratings. The change was made to better reflect how HVAC systems perform in real-world conditions, not just in lab tests. This update included changes in testing procedures, such as using more realistic external pressure and airflow setups.
As a result, the new numbers may appear lower even if the equipment is just as efficient—or more so. For example, what was once rated 15 SEER may now show around 14.3 SEER2. The goal is to give homeowners a clearer picture of how the system will work once installed in their home.
Heat pumps are designed to handle both heating and cooling, which is why they have two separate efficiency ratings. SEER2 shows how well the unit cools during the hotter months, while HSPF2 measures how efficiently it heats in colder weather.
If you're using your system mostly in summer, SEER2 should be your focus. But if winters are long and cold in your area, a higher HSPF2 rating can make a big difference in energy use and comfort. Both ratings together help show how a system will perform throughout the year.
InverterCool's Ultra models are built to meet high efficiency standards under the new SEER2 and HSPF2 guidelines. Their 2 Ton Ultra Heat Pump, for example, is rated at:
● 17 SEER2
● 8.5 HSPF2
● ENERGY STAR certified
These ratings mean the system uses less electricity for the same level of comfort. On top of that, many models qualify for federal tax credits and local rebates, helping homeowners save even more over time.
Not all homes need the same kind of efficiency. Here are a few simple tips to guide your choice:
● If you live in a hotter climate, focus on a higher SEER2 rating to save on cooling costs.
● If you’re in a colder region, a stronger HSPF2 rating helps lower heating bills.
● InverterCool offers models with balanced ratings, so you don’t have to trade one benefit for the other.
Understanding SEER2 and HSPF2 makes it easier to choose a heat pump that truly fits your home. These updated ratings reflect how a system performs in real-world conditions, not just in test labs. InverterCool’s high-efficiency models with 17 SEER2 and 8.5 HSPF2 offer strong performance for both cooling and heating seasons.
Whether you’re trying to lower your energy bills or just want better year-round comfort, checking these numbers is a smart first step. And with available rebates and certifications, efficiency doesn't have to cost more upfront.
What is a good SEER2 rating for a heat pump?
A SEER2 rating of 15 or higher is considered efficient. InverterCool’s Ultra models reach 17 SEER2.
What HSPF2 rating should I look for in colder areas?
An HSPF2 rating of 8 or above is ideal for cold regions. InverterCool’s 8.5 HSPF2 rating fits well for homes needing solid winter performance.
Are SEER2 and HSPF2 replacing SEER and HSPF completely?
Yes. As of January 2023, SEER2 and HSPF2 are the updated standards used for new HVAC systems in the U.S.
Can I still compare old SEER ratings to SEER2?
Not directly. SEER2 uses stricter testing, so numbers may appear lower but reflect more realistic performance.
Do InverterCool systems qualify for rebates or tax credits?
Yes. Many InverterCool units meet ENERGY STAR requirements and may qualify for federal and local energy incentives. Always check current rebate programs in your area.