Latest Update: 16/Aug/2021 (Design for manufacture optimisation of 3D printed tubular brackets to V1_2, can now be printed at 0.3mm layer height in half the time. See additional image for more detail.)
This design listing is for a DIY Pocket Filter Air Purifier using a floorstanding circular gym fan and F8 (MERV-14 equivalent) HVAC pocket filters.
Detailed instructions PDF can be found in Thing Files section of this design listing.
Adapted from the Corsi/Rosenthal box fan DIY filter to use a circular fan and EU specification HVAC pocket filters.
Designed to solve the issue of poor retail outlet availability of box fans and MERV-13 filters in the UK and EU.
Constructed from components available online retail, with next day delivery in the UK.
Purchase hyperlinks can be found in the instructions PDF. Lower cost alternative components of the exact same specification can be used.
Operate at max fan power to ensure pocket filters inflate well and stay separated.
Designed using discussion from previous work characterising circular sealed fans and MERV-13 panel filters. Reference: DIY Air Purifiers – Tests and observations (version of 14/Nov/2020) With participation of Pilar Remacha, Eduardo Tizné, Antonio Pina, Luis Ojeda, Alberto Campos, Javier Ballester LIFTEC (Joint Centre Univ.Zaragoza/CSIC,Spain) Available at twitter.com/JbcLiftec
Unvalidated design prototype concept. Flow rate through the filter media is unknown. Efficacy of this specific configuration to reduce viral loads indoors has not been characterised.
If you have access to box fans and MERV-13 panel filters, advise constructing the well proven Corsi/Rosenthal DIY design instead. https://www.texairfilters.com/a-variation-on-the-box-fan-with-merv-13-filter-air-cleaner/
If you have capability to provide a calibrated m^3/hr flow rate test please get in contact.