Olympia cold air returns are slatted wood returns designed for wall use. They feature an integrated box to fit a standard size filter. This is very useful in house where the filter is in a difficult location to reach, such as a crawl space or an attic. Of course, it is not necessary to use a filter with it, but you have the option.
Olympia returns are made of wood and there are two types. One is provided primed so you can paint it in your choice of colors. The other is a high quality stain grade wood for those preferring a natural finish.
These units are typically on hand and ready to ship out.