Outlet Wall

tablesaw, into which I glued the longer scrips. Being a stickler for detail, I also cut dadoes in the frame pieces, using the slotted grille strips for patterns, to join the grille to the frame. An easier approach, shown in Fig. 1, "Grillework and Frame Detail/' would be to cut a groove in the inside face of the frame, notch the ends of the strips, and glue the completed grille into the groove.

I cut several cappcd plugs that fit into the grille openings. The plugs act like stops on a workbench, helping to keep workpieces stationary when I use an orbital sander. (See top photo, opposite.)

Clearing the Air

I use pleated paper furnace filters, which come from a number of manufacturers in a range of sizes including 20 by 25 in., and are available at hardware stores and home-improvement centers. If you're interested in maximum efficiency, 3M*s furnace filters collect particles as small as 0.3 microns, and they're available from the same sources. (Note that some filters are actually as much as 5/8 in. smaller in each dimension than their nominal sizes, in which case you'll have to use thicker polyurethane foam around them or scale the cabinet's dimensions down.)

I check the top filter fairly often. When it's full of dust, I just rake off the cover, remove all three filters, and clean them by knocking the dust off in my driveway and vacuuming them thoroughly. A

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