which fan should be better ?

I thought of trying out the vevor fans if ATLien415 says they are sick. They look like cloudray clones. I own a few vevor things and they tend to use thin materials. I may have to try them out. The Honeywell TurboForce fans are pretty solid for the price around 15 bucks. I have a few that have been practically running non stop for the last 3 years. I only use them on the ground though. I see some people rig several of them into a large fan array though

Hey friend, we don't know sturm, but we have the 6" VEVOR set up and we're very happy with the flow, the noise, and especially the price, it was really cheap for us. Hope we helped and happy growing 💚🍀🌱🍀💚

vevor is gas af. skip the whitelabelling "my fake branding" of the stuff you see at Lowes/Home Depot. do your own research. same lading info, same factories, same suppliers, often better standards.

A decent 4" fan will do it for a 2x2 tent... CFM is a useful metric, but it doesn't tell you how it performs under static pressure -- resistance.. like bends in ducts, carbon filters etc. Those cheap duct fans (usually looks like a normal aluminum duct with a fan blade mounted inside) list the same range of CFM for 4" sizes, but do not maintain that cfm if there is any sort of resistance. CFM spec doesn't paint the whole picture. I'm not familiar with either of these companies. You'd have to email tehm about how the duct fan performs under various levels of static pressure. It's a simple plotted curve... the brand that holds its cfm better under pressure is a higher quality fan... only common sense needed to determine whether the difference is relevant or insignificant. I'd also recommend something with an "EC" motor. If not you usually only have power control of 75-100%. Best to buy something you can run at 50% or less. It'll be quieter and last longer.