I have two big dogs who are outside any time I'm not home. so they bring in dirt. my old 2600k system lived on the floor for 6 years and I had no problems if i kept up with the dust filters, tho even with that every 3 or 4 months I had to take it all apart and blow it out with the air compressor. my 7700k system I built it in a HTPC case and it sits on the desk by the monitor. but i have a huge desk. I have one of those old steelcase desks from the 80's and it's got a 38'x78' top on it. I also am using a 40" 4k tv as my monitor. I have some polk speakers for sound that are wall mounted aside the monitor. A wall mount for the screen is on the way. I'd send a pic but I broke my phone and am waiting on a new one and the old one takes crap pics. my bit of advice is, if you have pets and its on the floor, no windows. you'll hate them if you have them. I had a clear panel for my old case and i got rid of it and got the solid steel panel instead. the plastic window makes static electricity, so dust and dog hair are attracted to it. ideally, glass cases are for desktops/etc or hardwood floors especially if you have pets. it can be done, but depends on how much you want to work for it to keep it clean. in a non pet house, shouldnt matter too much, there's not too much more dust 1 foot off the ground as there is 3 foot off the ground.