Our electrician installed a new circuit through ceiling in a finished basement to crawl space for a Mitsubishi ductless mini-split. The junction was an existing box and he run a cable through the crawl space to the outside. He ran the conduit under siding across back of house and over to condenser location. The tech then located the head on the wall to verify height and location with customer. Then he drilled through the wall to run the line-set (tubing that connects to the unit heads) next to trim boards. Finally they connected lines and pressurized with nitrogen to check for leaks.
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