3D print a Hepa air filtration box
I share my experiences on reducing indoor air pollution on my website http://stopauxparticules.fr/ . This article comes from that site.
I designed here an air filtration box , which will be located at the air intake of a double flow CMV.
This box is composed of 2 parts, which I represented here in green and light gray. The lower part clips onto the upper part.
I designed the housing around the H14 HEPA vacuum cleaner filter . The advantage of this filter is that it's perfectly suited to the standard 125mm diameter used in domestic ventilation systems. I left a space underneath to house a cut-to-size filter (filter media) for pre-filtration (not shown in 3D model here). This filter box is based on the same principle as the wooden filter housing I made previously.
I made both parts with an “Ultimaker 3+” 2D printer. It is necessary to have a tray of about 20 cm on the side. The small plates of machines like the FlashForge are too small (225 x 145 x 150 mm).
I didn't optimize the part design to minimize supports, so there will be some post-processing 🙂
2 replies to “Air filter box for mechanical ventilation”
All this is good, but it is useful to learn about fluid mechanics problems .. to do well (pressure loss, sizing, ... ect)
The more you want to do in the "end", the more ventilation must be neat .. and powerful!
The section of the filters should be> section of the duct ... with a fan allowing sufficient pressure (600 to 800 Pa for example (A filter generates 150 to 300 Pa of pressure drop typically) (therefore avoid tinkering with a fine filter on a VMC)
In addition, too much pressure drop favors condensation ... which is very bad, and must be countered by more engine power ... ect
It is a chain of "transmission" and its performance will be calibrated by the worst link!
cordially
Hello Yannick
Thank you for your clarification. I use here an additional ventilation to counteract the pressure drops of the fine filter.
cordially