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The guts of this project was a $5 furnace blower motor from a local estate sale. The motor was set up for three speeds. |
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Here is a front view of the bezel of the unit. The blower is mounted to this plate. The switch changes the blower speed. The on-off switch is a 12-hour timer. |
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Then I ordered a set of standard replacement filters for a shop air cleaner. I built a simple plywood box big enough to fit the filters and the blower. Here the blower assembly is mounted inside the box. |
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To hold the three filters I made a simple arrangement of three plywood slots. They are just the right size so that the little door, when closed, holds all the filters in place. |
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Here is a side view of how the three filters slide into the box. The two filters toward the inside are standard shop airfilters. The outer filter is a standard furnace filter. |
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Here is an end view of the three filters being slid into place. |
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I am sure it is a bit heavier than the standard store bought model, but it definitely moves around more air, too. It is knid of heavy, but here it is hanging in my shop. |
