Building a air purifier system for your home is easy (and affordable!). In this video, I'll take you step-by-step so you can build your own. Download the Start Preparing! Survival Guide here: https://cityprepping.tv/38C5Ftt ... Start your preparedness journey: https://cityprepping.tv/3lbc0P9
Here's the scientific evidence showing how this works: * Cadnum, J.L. et al. (2023) ‘Effectiveness of commercial portable air cleaners and a do-it-yourself minimum efficiency reporting value (MERV)-13 filter box fan air cleaner in reducing aerosolized bacteriophage MS2’, Infection Control & Hospital Epidemiology, 44(4), pp. 663–665. Available at: https://doi.org/10.1017/ice.2022.5. * Dal Porto, R. et al. (2022) ‘Characterizing the performance of a do-it-yourself (DIY) box fan air filter’, Aerosol Science and Technology, 56(6), pp. 564–572. Available at: https://doi.org/10.1080/02786826.2022.2054674. * Derk, R.C. et al. (2023) ‘Efficacy of Do-It-Yourself air filtration units in reducing exposure to simulated respiratory aerosols’, Building and Environment, 229, p. 109920. Available at: https://doi.org/10.1016/j.buildenv.2022.109920. * Dodson, R.E. et al. (2023) ‘Does Using Corsi–Rosenthal Boxes to Mitigate COVID-19 Transmission Also Reduce Indoor Air Concentrations of PFAS and Phthalates?’, Environmental Science & Technology, 57(1), pp. 415–427. Available at: https://doi.org/10.1021/acs.est.2c05169. * Gasparrini, W. et al. (2022) Testing the Efficacy of the ‘Corsi-Rosenthal’ Box Fan Filter in an Active Classroom Environment. preprint. Chemistry. Available at: https://doi.org/10.26434/chemrxiv-2022-77x33. * He, R.(何瑞辰) et al. (2021) ‘Airborne transmission of COVID-19 and mitigation using box fan air cleaners in a poorly ventilated classroom’, Physics of Fluids, 33(5), p. 057107. Available at: https://doi.org/10.1063/5.0050058. * Holder, A.L., Halliday, H.S. and Virtaranta, L. (2022) ‘Impact of do-it-yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment’, Indoor Air, 32(11), p. e13163. Available at: https://doi.org/10.1111/ina.13163. * Li, L. et al. (2022) ‘Effect of low-cost recirculating portable air filtration on aerosol particle deposition and concentration in a conference room: Experiment, theory, and simulation comparison’, Journal of Aerosol Science, 166, p. 106048. Available at: https://doi.org/10.1016/j.jaerosci.2022.106048. * May, N.W., Dixon, C. and Jaffe, D.A. (2021) ‘Impact of Wildfire Smoke Events on Indoor Air Quality and Evaluation of a Low-cost Filtration Method’, Aerosol and Air Quality Research, 21(7), p. 210046. Available at: https://doi.org/10.4209/aaqr.210046. * Srikrishna, D. (2022a) ‘Can 10× cheaper, lower-efficiency particulate air filters and box fans complement High-Efficiency Particulate Air (HEPA) purifiers to help control the COVID-19 pandemic?’, Science of The Total Environment, 838, p. 155884. Available at: https://doi.org/10.1016/j.scitotenv.2022.155884. * Srikrishna, D. (2022b) ‘Long-term experience with rapid air filtration (6 to 15 air changes per hour) in a K-5 elementary school using HEPA and Do-It-Yourself (DIY) air purifiers during the COVID-19 pandemic’. medRxiv, p. 2022.11.05.22281734. Available at: https://doi.org/10.1101/2022.11.05.22281734. * Tham, K.W. et al. (2021) ‘Performance characteristics of a fan filter unit (FFU) in mitigating particulate matter levels in a naturally ventilated classroom during haze conditions’, Indoor Air, 31(3), pp. 795–806. Available at: https://doi.org/10.1111/ina.12771. * Van Valkinburgh, K. et al. (2022) ‘Assessing Mitigation Strategies to Reduce Potential Exposures to Indoor Particle Release Events’, Aerosol and Air Quality Research, 22(9), p. 220054. Available at: https://doi.org/10.4209/aaqr.220054.
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