LG 2-Zone 18,000 BTU LGRED Outdoor Unit 6Z 000 BTU indoor unit because

000 BTU indoor unit because of the difference of refrigerant line-set sizes

Outdoor Line-Set Ports: 1/4" x 1/2"

Indoor Unit LAN090HSV5

HSPF2 Up to 10

or you will use the five-zone branch box (PAC-MKA5) if you have four or five indoor units

LG 2-Zone 18,000 BTU LGRED Outdoor Unit 6Z 000 BTU indoor unit becauseGeneral Information Unit Type LG Outdoor Unit Product Line Multi F with LGRED Operating Mode Cooling & Heating Low Ambient Heat Yes Number of Zones 2 Unit Size 18,000 BTU Required Mounting Kit Pad w Risers, Wall Bracket Kit Package Includes Outdoor Unit LMU180HHV LG Multi F Outdoor Guides LG Multi F Installation Manual LG 18,000 BTU Multi F Outdoor Unit Submittal Unit Data Cooling Capacity 18,000 BTU Heating Capacity 22,000 BTU Heating(F) 13 to 75