Alpine Hardware American Owned Drillless Drill-Less Window Air Conditioner & Heat Pump Bracket – Window AC Support – Supports Air Conditioners Well Over 200 lbs. – Patented Design No Drilling Model

The hardest part about installing this bracket was drilling the holes – but that was because of how I installed it.I wanted my AC unit “outside” of my window, so I could still shut the window. I did this by creating a plywood “baffle” that I could insert inside the recesses for the screen. I removed the screen, put the baffle in, then used putty tape to seal it up around the edges.To mount the AC unit and bracket this way, meant I had to drill and mount the bracket on the outside brick/block “sill” of my window. So with some research, I settled on using some carbide bits to drill with, and special “blue” anchor screws. I quickly found that:a) you want to drill the block “dry”b) you want to periodically use canned air (or a compressor) to “blow out” the hole as it fills with dustIf you don’t do those steps – you end up with the drill only going so far, then not going any further. So drill, blow out the hole, drill some more, etc – until you get to the depth needed.But other than that difference, I followed the instructions just as they were written, and things went together really well and fast. I’ve had the bracket up for about 2 weeks now, and it works great. It only took a couple of hours to install (I took my time, as I didn’t want to mess up the block), then a few more to make the baffle (a week or so later, I caulked it, painted it, then re-installed it properly – but I did use it for a week without all of that).The only other extra thing I did was add a couple of L-brackets to the holes, to keep the unit from potentially “sliding backwards”. Overall, the install turned out great, and I’m very pleased with the product.