nzxt cases only support nzxt fans. as long as you keep the fan measurements the same size. (case says 140mm, you only use 140mm nzxt fan. same for the 120s and 200s)
Not true. Our cases natively support any 120mm and 140mm fan that's on the market. The only issue were the original Phantoms, in which there was NO industry standard for 200mm fans, so only our 200mm fans would work.
We have since adopted industry standard 15mm spacing for radiators for all future chassis that would support watercooling, and we will maintain the standards for 120mm and 140mm fans.