Had a minisplit installed. The heat pump is resting on the ground, which is where I wanted it.
Asked installer if refridgerant and drain line could be run between the drywall and brick so as not to have the channel mounted vertically down the side of the house to where the heat pump is. He gave some generalized excuse 'that I don't want to do it that way', 'usually have problems'. I could not get an example or a reason why it couldn't be installed that way.
I looked in the supplied installation manual, and I did not see it discussed.
Why could or would it not be a acceptable method to run the refridgerant and drain line between the drywall and brick?