I’m looking to install a 19 SEER Mitsubishi 24000 BTU mini split system on my garage. I’m limited in where I can put the outdoor unit, so my desired location happens to be directly behind where I want to put the indoor unit. The wall that will separate the units is 2-layer brick, so I expect that the lineset length will only be a max of 3-4 feet

I’ve seen plenty of warnings about putting the units too far apart, but never about too close together. Besides reducing the coolant pre-charge down from 25ft, are there any other concerns I should have about installing things very close together?

Thanks!