HEPA Airpurifier

This is my first design of an HEPA Airpurifier, it uses one Noctua NF-P14S fan, 2 Hepa filters from an iRobot Roomba, 1 PWM fan Controller and 1 12V powersupply.Links:Noctua: https://www.amazon.de/Noctua-NF-P14s-redux-1500-PWM-Hochleistungs-Lüfter/dp/B00KF7O58G/ref=sr_1_4?__mk_de_DE=ÅMÅŽÕÑ&crid=15Q0GO0MJI5ZY&dib=eyJ2IjoiMSJ9.k6EIDkPSo12M5jXhph7YMOIVsZ7koNVoaH0DsahmP4OpK2kAjZzY3ekuYX36nmtizapZmjm_sEs1C4YOPqbaFB8b1f6NvjgN3p8ycEzpcGCqk8poD6vcjHZyfo-dyPhmvU8jW4pm4MKYfarHLQNLPLCVK_yJ12VkmF3LnM540S4G14l0yVJadfUutBy5LeeX9TVkeHRWWeGy2m6c3NqfutPHpgw-L4Hci_ORqPc871s.zS38bghtqRNKoLhe-9wuQBzBtot3gAUmW9FaUivL9RA&dib_tag=se&keywords=Noctua%2Bnf%2B14ps%2Bredux&qid=1771095808&sprefix=noctua%2Bnf%2B14ps%2Bredux%2Caps%2C148&sr=8-4&th=1HEPA: <a target="_blank" rel="noopener noreferrer ugc" href="https://www.amazon.de/TALENTEC-home-Kompatibel-Modelle-Schwarz/dp/B0DCVSN7C7/ref=sr_1_11_sspa?__mk_de_DE=ÅMÅŽÕÑ&crid=3P6WJFY5R0BIU&dib=eyJ2IjoiMSJ9.kyMqkzbG672wAdcTtblRRGYNw6MW_jlQ0FwKOMtKKbBtig77eToJhV61hSNGpx2i