Purchased this for my shop to clean parts before they go in vapor honing cabinet. Works awesome with recycling detergent but needs a couple things to really make it great. One it needs a wiper system on window so that you can see while spraying parts. I added one myself just like i have on vapor honing cabinet. Two the fan exhaust needs a flange on it to allow you to be able to hook vent tube to it. You do need to vent this outside even if only using detergent. My ahop is 26x49 with 10ft ceilings and after cleaning a few parts you can taste the detergent in the air. I made a flange and connected a dryer vent to it and now its perfect.