The HSPF2 standard, or Heating Seasonal Performance Factor 2, is the new metric for measuring the heating efficiency of heat pumps. It replaces the older HSPF rating to provide a more rigorous and accurate test of how a unit performs in real-world conditions. When you browse our Heat Pump Systems, looking for a high HSPF2 rating will ensure lower heating costs during the winter. This is particularly important for residents in colder climates who rely on their Hyper Heat models year-round. A higher number indicates that the unit can produce more heat using less electricity, which is better for both your wallet and the environment. Many of our latest Cooper&Hunter systems are engineered to meet or exceed these new federal standards. You can find specific HSPF2 data for every model on our Technical Data page. Understanding this rating helps you choose a system that is truly optimized for winter performance.