Just how big of a mini split do you need to cool a shop?? Keeping a 1,440sqft Pole Barn CHILLY with just a Window ...August 19, 2023 in 30x48 Pole Barn Shop Build / Shop Tips & Tricks / Shop Tours! tagged A/C / Air Conditioning / Casement / Cool / Insulation / Mini Split / Pole Barn / Shop / Slider / Temperature / Window Unit by Paul