As of 2016, Grandeaire.com lists package system heat pumps from 13 to 14 SEER, split system heat pumps from 13 to 15 SEER and the Pinnacle heat pump at 18 SEER. The company supplies heating and cooling products to residences and commercial properties.
According to ACDoctor.com in 2014 and Enviro-NC.com in 2009, Grandaire heat pump ratings range from 13 to 15 SEER. Enviro-NC.com lists SEER ratings for V series, I series, commercial split systems and split systems. According to the site, V series and I series heat pumps have a 13 SEER rating.
ACDoctor.com lists a 13 SEER rating for Grandaire model WCH3 and a 15 SEER rating for the WCH5 pump.