What is the HSPF on this system?

Thank you for your question. HSPF ratings are only used for heat pump systems. This system is not a heat pump system, therefore, it does not have a HSPF rating. However, it does have other ratings that measure it's efficiency. For instance this system has a SEER (seasonal energy efficiency rating) of 16.5. However, if it is a heat pump system that you are looking for, please give us a call and we will be happy to assist you in finding the best system for you and your space.