Very different from the previous content on this blog so far, here is a brief writeup of the process of buying and DIY installing a mini-split. You'll need to ensure you have a pre-charged split (i.e. comes with refrigerant), most you buy on Amazon / big box stores would say so (and most would be this way anyways, pre-charged is standard for places homeowners can buy from). If you're doing 220V, which is likely if you want one head for your entire basement or multiple heads, you'll need a line to be ran wherever you are putting your condenser. I was able to steal line that had been ran for a hottub and just install a shutoff switch with a 30Amp fuse. You'll definitely need to drill a whole through your wall in some capacity. Your refrigerant lineset and communication lines will need to be ran from the inside to the outside. You'll also need a vacuum pump, as you need to extract moisture from the lines + verify that your connections are good. You'll pull a vacu...