alhu authored on July 25, 2021, 7:05 p.m. | | Additions are marked like this |
The Corsi-Rosenthal Cube (sometimes called a Comparetto Cube) is an inexpensive, do-it-yourself air cleaner that can be easily constructed out of a box fan and MERV-13 furnace filters. The Corsi-Rosenthal Cube can give whole-room air cleaning performance comparable to commercial HEPA air cleaners that are 10x or more the cost. Total cost is around $100. Construction guideWhat's needed: 
How to construct:
Filter brands to potentially avoid
Variations
5-filter version Rather than placing a piece of cardboard on the bottom side of the cube, another filter can be added in place of the cardboard. In this case, you would want to raise the cube off the ground (without blocking the entire bottom filter) so that the bottom filter could be utilized. This would in theory lead to even less resistance on each of the filters, potentially prolonging the life of the cube or increasing the air output. Two filter "wedge" design. 
A variation of the air cleaner can be made using two MERV-13 filters (add details). This version is slightly less expensive (2 less filters are needed) and has a slightly smaller footprint. One filter design, the "classic" DIY box fan air cleaner design. You can duct tape a single filter to the back of a box fan. In this case there is more strain on the fan motor, more air resistance and the air cleaning efficacy would not be as great. You would also have to replace the filter on the back of the fan more often. But this design has the advantage of having a low footprint and being the least expensive option. 
Using a non-box fan With some effort (and potentially a lot of duct tape or custom woodworking), you can make a cube using a higher-CFM floor fan. The advantage of this design is that these floor fans put out a lot more CFM than box fans, so the unit will clean the air faster or be better in larger spaces. The downside is it's harder to construct, considerably louder and the cube is less physically stable. There is a guide to constructing a version of one of these using wood. HistoryAs discussed in his original blog post, the design for the Corsi-Rosenthal Cube was detailed by Jim Rosenthal, CEO of Tex-Air Filters, and was dedicated to Dr. Richard Corsi. Neil Comparetto also detailed a similar design in a popular YouTube video, which he called a "Comparetto Cube." See also
News / media stories
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The Corsi-Rosenthal Cube (sometimes called a Comparetto Cube) is an inexpensive, do-it-yourself air cleaner that can be easily constructed out of a box fan and MERV-13 furnace filters. The Corsi-Rosenthal Cube can give whole-room air cleaning performance comparable to commercial HEPA air cleaners that are 10x or more the cost. Total cost is around $100USD ($130CAD). Construction guideWhat's needed:
How to construct (Figure 2): 
Filter brands to potentially avoid
Variations
5-filter version (Figure 4) Rather than placing a piece of cardboard on the bottom side of the cube, another filter can be added in place of the cardboard. In this case, you would want to raise the cube off the ground (without blocking the entire bottom filter) so that the bottom filter could be utilized. This would in theory lead to less resistance on the fan motor, potentially prolonging the life of the fan and filters, and increasing the air output. 2-filter "wedge" design (Figure 5)
A variation of the air cleaner can be made using two MERV-13 filters (add details). This version is slightly less expensive (2 less filters are needed) and has a slightly smaller footprint. One filter design, the "classic" DIY box fan air cleaner design. You can duct tape a single filter to the back of a box fan. In this case there is more strain on the fan motor, more air resistance and the air cleaning efficacy would not be as great. You would also have to replace the filter on the back of the fan more often. But this design has the advantage of having a low footprint and being the least expensive option.
Using a non-box fan (Figure 6) With some effort (and potentially a lot of duct tape or custom woodworking), you can make a cube using a higher-CFM floor fan. The advantage of this design is that these floor fans put out a lot more CFM than box fans, so the unit will clean the air faster or be better in larger spaces. The downside is it's harder to construct, considerably louder and the cube is less physically stable. There is a guide to constructing a version of one of these using wood. HistoryAs discussed in his original blog post, the design for the Corsi-Rosenthal Cube was detailed by Jim Rosenthal, CEO of Tex-Air Filters, and was dedicated to Dr. Richard Corsi. Neil Comparetto also detailed a similar design in a popular YouTube video, which he called a "Comparetto Cube." See also
News / media stories
|
