What is the CEER and HEER of the All-Weather 120V heat pump? December 03, 2024 16:42 Updated The CEER is 16.8, which is approximately SEER2 between 19-23. The HEER is 9.4 which is equivalent to a HSFP2 of 9.3. Related articles What temperatures can the All-Weather 120V heat pump operate in? How is this product any different than a mini-split? What refrigerant does the All-Weather 120V heat pump use? How is the All-Weather 120V heat pump controlled? How long is the power cord?