After spending countless hours building my own a few years back I came across their great looking product. They work as advertised and were within 1 db of the ones I built. The advantage of mine was being able to select which side I wanted the air inlet to be. Getting that away from direct ear shot saves a db or so alone. The Wakos are incredibly well built and a brilliant design. It is amazing how much work goes into making and selling something like this.
The air filter alone is a superb design. I could never get the right filter setup on my builds. It would be nice if they had a quick release to be able to clean the filter. Full timing living at the end of a dirt road makes them clog quickly and taking the four screws out to remove the cover and then loostening four others is a bit o a pain but I liked the first one so much I bought the second one too.
My design got rid of the noisy down dump and that alone made a huge difference. You can probably improve your air flow while the cover is off and look at your registers. Mine were never trimmed down so stuck into the ducting almost to the top. The air had to struggle to get up and down into the outlet. Trimming the tubes made a phenominal improvement in air flow.
The product is not cheap but sitting under one of those noisy AC's is a real pain full timing in Florida.
