Shop & tools • Customer build

A wooden home for a HEPA filter

A custom flow-hood build that brings a large filter and a purpose-built plywood enclosure together.

Documented October 2021Build story

SOURCE GEOMETRY

Turn the model around.

Interactive view of existing export geometry, centered and scaled for display. Source units are not asserted.

Drag to orbit. Use + / - to zoom, arrow keys to rotate, or Reset to return to the starting view.

The need

House a large filter assembly in a customer-specific piece of equipment.

The response

Develop an enclosure configuration, then fabricate and assemble the plywood housing.

The result

A photographed custom flow hood; the 1200 CFM designation remains the original project description.

PART OF A LARGER COLLECTIONModels, drawings & spaces →

Professional notes

Contribution

Custom enclosure fabrication and assembly.

Result

A custom flow-hood build that brings a large filter and a purpose-built plywood enclosure together.

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A customer build around a different kind of component

This project combined a large filter with a purpose-built plywood housing. I described it in the October 2021 post as a 1200 CFM HEPA laminar-flow hood and my favorite project to date.

The enclosure around the filter

The filter needed a fitted enclosure, so the plywood housing was part of the working equipment. I also included an earlier SketchUp view to show how I was laying out the enclosure before the photographed build.

Woodworking for an equipment build

The fabrication was familiar shop work: cut the plywood, assemble the housing, fit the filter, and finish the wood. The customer handled how the finished flow hood was used.

The earlier enclosure model

The source folder contains laminar and laminar2 SketchUp models and STL exports. The rotatable view below comes from laminar2.stl, dated August 2021, and shows an earlier configuration than the October build photo.

Building around the filter

I fabricated the plywood enclosure around a large HEPA filter and assembled the flow-hood housing for the customer. The work used familiar shop skills, but the finished object was equipment rather than furniture. I had to build around the filter dimensions and keep the enclosure practical to assemble. The earlier SketchUp and STL views show a previous configuration, while the October photograph shows the built wooden housing. The customer handled the final application.

Credits & project notes

Design and making: Michael Pytlowany.

The original caption calls this a 1200 CFM HEPA laminar-flow hood. That is the creator description, not a measured airflow or clean-air certification. This page documents the build, not laboratory suitability or installation instructions.

Sources

Mike's Functional Artistry project archive
07 October 2021

laminar2.stl and associated SketchUp model archive
August 2021

A closer look

Neutral shaded view generated from the archived laminar2.stl enclosure model.

Tools used in this work 7

Kobalt table saw ↗Milwaukee M18 drill/driver ↗Milwaukee M18 random-orbit sander ↗Milwaukee M18 batteries ↗Pipe clamps ↗Integrated table-saw workbench ↗Husky 902 utility knife ↗