i got a lg inverter minisplit and did 90% of the install. i did the electric, hung inside unit, ran lines and control wire, and had everything done but vacuuming the lines. the system was prefilled with refridgerant. i found a local ac guy(not a large company) and told him i needed to have the system sucked down and then check pressures, $60 was the charge. he asked about checking inside unit and i explained(lied) that i installed the ac because our master bedroom(above my room) is hard to keep temps and my very ill wife has trouble with the heat and all the hospital equipment makes it warmer. and she said she just couldnt have anyone come in while she is so sick. he did what we agreed, wished my wife well, and happily took the cash, no reciept needed. best thing ive bought for my hobby.