How many indoor units can be connected to the PURY-HP72 outdoor unit?
The PURY-HP72 (capacity index 72) can connect a maximum of 18 indoor units. The maximum total capacity of connectable indoor units ranges from 36 to 108, and compatible indoor unit models are P06 through P96 from the R410A series. (Page 19)
From the official Mitsubishi PURY-HP72 Heat Pump manual, page 19
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