Patched this unit into my forced air return and use it as a whole house air filter. It is amazing and gross how much dirt it catches especially when the forest fires smoked us out. The variable speed was helpful to slow air when not needed as much. Very quiet given how much air it moves. Filter is less than easy to replace with the style of spring clips. One clip broke and won’t stay open without holding it when changing filters. This bad clip is the main reason mine is hard to change. It is nice to have the carbon filter in case I paint or have high VOC to collect. This is a large, robust and durable unit.

Super happy with these units. Came in perfect packages boxes no damage and great priced. I’ll be buying more. Thank you for great service