American Standard Ductless Systems NAYUp to 24.6 SEER NAXWSTUp to 24.6 SEERUp to 12.8 HSPF MSZ-EF NAXWPHUp to 33.1 SEERUp to 13.5 HSPF NAXWPH NAXWST NAXWMTUp to 18 SEERUp to 10 HSPF PEADUp to 19.4 SEERUp to 11.5 HSPF PEADUp to 19.4 SEERUp to 11.5 HSPF NAXDKSUp to 17.5 SEERUp to 10 HSPF NAXDKSUp to 15 SEERUp to 10 HSPF NAXCKSUp to 16 SEERUp to 9.6 HSPF NAXCKS NAXAMTUp to 17.6 SEERUp to 10.4 HSPF NAXFKSUp to 28.2 SEERUp to 13 HSPF NAXFKS NAXUKS NAXMMX NAXSKSUp to 18.8 SEERUp to 12.1 HSPF NAXSMTUp to 10 SEERUp to 18 HSPF NAXSPBUp to 33.1 SEERUp to 13.5 HSPF NAYSSTUp to 24.6 SEER NAXSSTUp to 24.6 SEERUp to 12.8 HSPF NAXFKSUp to 28.2 SEERUp to 13 HSPF