6 Inch Inline Duct Fan 469 CFM with Variable Speed Controller - EC Motor Duct Booster Fan for HVAC, Grow Tents, Hydroponics - Perfect for Home Ventilation, Greenhouse Air Circulation & Indoor Gardening Systems

Too lazy to post pics right nowBeen really tired of paying 3-4X the money for air purifier units, and paying like 3-13X the amount for filter replacementsSaid air purifier units, the premium ones have high CFM like 250-400 range. You'd be paying like what, 400-1000$ relatively. I'm sure you all know EXACTLY which brands i'm talking aboutMind as well buy this Hon and Guan 469 CFM on sale (or not) and still get the same results, while using less spaceWith these duct fans, you can use them with them circular carbon filters to remove TVOC out of the air. Wait, you know that already. If you haven't WELL WELCOME ABOARD!(You will know many a very good things by going this "inline/booster duct fan" route and the massive amount of money you'll save in the long run)Welp, since I already have my Booster Fan doing the Carbon Filter thingTHIS 469CFM fan is FOCUSED on particles.So yeah, instead of spending like 100-200 bucks a year on some HEPA filter from big brand air purifier brand; You could spend like potentially 10-20 bucks for a **circular** HEPA filterFrom Tee Muu. DUCT TAPE it to the "suction" part of this unit. Use the RIGHT SIZED "plate" on the bottom of the circular HEPA filter to cover the gap.Crank this 469 CFM inline duct fan on. WHAM. You have ultimate HEPA-tier air purifying power for a massive fraction of the price. Mind you, said filters are REAL HEPA. Because my particle tester says so, after viewing the resultsREquires a bit of DIY, but it's EASY DIY. I am the worst handyman at the moment. If I could DEW IT, you could too. I use Gorilla Tape. Any quality Duct Tape will doThe only cons about this device, is that it's LOUD, when turning it over 50% power. Not as loud as an IQAir Machine when turned up high. That's just my experience.But whatever, that's how it is with these machines. I will get a duct fan silencer on sale when the time is right.I'm not asthmatic. But I am sensitive to air. When I crank this thinig to 66.666666666% power or moreThe Divine particle AIR PURIFICATION of this thing is unbelievable. Does a WAAAAAAAAAAAAY better job than my former IQAir machineI haven't tested this properly on a carbon filter yet, and probably won't even bother anytime soon, since my cuirrent setup is great as it isI'm just really happy having this Hon and Guan Inline Duct FanAgain, when I am in the mood, I'll edit this review and upload some demonstration video, showing the particle tester. AND the power of the suction this thing has, when it's taped to a circular HEPA filterOH HEY, I FORGOT TO SAY ONE THINGRemember when those Corsi Rosthanthal Boxes were a thing? When people were really upping their game, to purify the air from particles?I've done all the math already. Those Corsi Rosthantal boxes take way too much space. Those HVAC filters or whatever they are, are too pricey. In my opinion, the math just comes to the same, as buying any other regular air purifier. Too much work too when using "THAT" amount of tape and space and time to put it all togetherForget Corsi Rosthantal boxes. BUY THIS INSTEAD! TAPE IT ON A CIRCULAR HEPA FILTERHECK, YOU COULD EVEN TAPE 2 CIRCULAR HEPA FILTERS or STACK 3 and CRANK this inline duct fan, and it'll do it's job. You just need to use more duct tape. BUT NOT AS MUCH AS TAPE USED IN A CORSI ROSTHANTAL CONFIGURATION. HOLYAnyways, you get the ideaThe THINGS you could do with this Inline Duct fan. I'm really unfamiliar with all those indoor greenhouse plant growing things, that these duct fans are used with. Let alone I'm really no pro with HVAC etc etcI'm just a major air purifier enthusiast and critic, and to me, this inline duct fan is "my best air purifier" ever