My Two Latest DIY DC Box Fans! both with AC power Option! both easy to make. good for on and off grid use. runs on 12v solar panel, 12 battery, cars cig. lighter plug or AC. both fans are very high flow and both have motor speed control (for essentially unlimited speed options). full build video links and links to AC adapters listed below. tip: these fans are great at handling “drag” so they’re great for use as “DIY air purifiers”. just drop an air filter on the back. you should be able to use the high end (MERV 10-14) ones if you want *with very little slowing of the motor.
large size box fan full build video
smaller box fan full build video
standard ac to dc converter 10A one
high end AC to DC one