Indoor Unit
Outdoor Unit One Units Two Units
M4THM1518A12N
18,000 BTUH
9 9+9 12+12
12 9+12
Outdoor Unit Two Units Three Units
M4THM1524A13N
24,000 BTUH
9+9 9+12 9+9+9 9+12+12 12+12+12
9+18 12+12 9+9+12 9+9+18
12+18 18+18
Outdoor Unit Two Units Three Units Four Units
M4THM1530A14N
30,000 BTUH
9+9 9+12 9+9+9 9+9+12 9+9+18 9+9+9+9 9+9+9+12 9+9+12+12
9+18 12+12 9+12+12 9+12+18 12+12+12
12+18 18+18 12+12+18
Outdoor Unit Two Units Three Units Four Units
M4THM1536A14N
36,000 BTUH
9+9 12+18 9+9+9 9+12+18 12+12+18 9+9+9+9 9+9+12+18
9+12 12+24 9+9+12 9+12+24 12+12+24 9+9+9+12 9+9+18+18
9+18 18+18 9+9+18 9+18+18 12+18+18 9+9+9+18 9+12+12+12
9+24 18+24 9+9+24 9+18+24 18+18+18 9+9+9+24 9+12+12+18
12+12 24+24 9+12+12 12+12+12 9+9+12+12 12+12+12+12
Outdoor Unit Two Units Three Units Four Units Five Units
M4THM1542A15N
42,000 BTUH
9+9 12+18 9+9+9 9+12+24 12+12+24 9+9+9+9 9+9+12+24 9+12+18+18 9+9+9+9+9 9+9+9+18+18
9+12 12+24 9+9+12 9+18+18 12+18+18 9+9+9+12 9+9+18+18 9+18+18+18 9+9+9+9+12 9+9+12+12+12
9+18 18+18 9+9+18 9+18+24 12+18+24 9+9+9+18 9+9+18+24 12+12+12+12 9+9+9+9+18 9+9+12+12+18
9+24 18+24 9+9+24 9+24+24 12+24+24 9+9+9+24 9+12+12+12 12+12+12+18 9+9+9+9+24 9+12+12+12+12
12+12 24+24 9+12+12 12+12+12 18+18+18 9+9+12+12 9+12+12+18 12+12+12+24 9+9+9+12+12 9+12+12+12+18
9+12+18 12+12+18 18+18+24 9+9+12+18 9+12+12+24 12+12+18+18 9+9+9+12+18 12+12+12+12+12
Ductless Multi-Zone Approved Combinations
Ductless Multi-Zone Quick Reference
Multi-Zone Heat Pumps Outdoor
18,000 BTUH 24,000 BTUH 30,000 BTUH 36,000 BTUH 42,000 BTUH
M4THM1518A12N M4THM1524A13N M4THM1530A14N M4THM1536A14N M4THM1542A15N
Multi-Zone Heat Pumps Indoor Options
9,000 BTUH 12,000 BTUH 18,000 BTUH 24,000 BTUH
High Wall Mounted M4MHW1509A1N M4MHW1512A1N M4MHW1518A1N M4MHW1524A1N
8