I've designed and am trying to mass produce fans for cr-box style air purifiers, which are far far quieter for greater airflow than the usual box fans. About 10% more flow for 1/220 the noise energy (24 db). Www.bigquietfan.com
I've designed and am trying to mass produce fans for cr-box style air purifiers, which are far far quieter for greater airflow than the usual box fans. About 10% more flow for 1/220 the noise energy (24 db). Www.bigquietfan.com