Buy ASRock N100DC-ITX - Intel Quad-Core Processor N100 (Up to 3.4 GHz) DDR4- 2 SATA3, Supports Intel Turbo Boost Technology Mini ITX (280) Motherboards - Intel with fast shipping and top-rated customer service. Once you know, you Newegg!
I just stumbled across this on Newegg and it looks like a nice board for desktops in rugged environments
Nice. Supermicro carries a line of fanless servers that are compact and can be used in industrial settings. https://www.supermicro.com/en/products/embedded/fanless-edge-systems