HGC701400 Digital Mixed Flow Fan in and Out Room System, 6" - 315 CFM, Blue

This blower is not only great because of the high energy efficiency (which helps pay back the higher cost quickly under heavy use) but it's also adjustable. I'm using it for a whole-house humidifier and can dial its air speed to deliver just the right amount of humidity without a lot noise or power. The remote is on a plug with a nice long cord, so mounting this can in the ceiling, etc. is easily accomplished. Two wires run back to the blower from the remote and if all you want is top speed, you don't need to install the remote at all.I like this product so much, I'm considering modifying other air-moving equipment around the house to use it instead of the OEM-supplied PSC motor. For example, ERVs use power much of the year and hence are perfect candidates for equipment like this that moves air more efficiently. Plus, controlling the speed of the fan electronically is super easy. For safety reasons, I used a opto-isolator to short out 1/8W resistors arranged in a ladder; works like a charm, is inexpensive and allows a wide range of speeds.

We've been experimenting with fans for the last few years for our indoor grow space. We've probably tried 12-15 different fans, and this is by far the best. It's absolutely the quietest fan we've used. On low, it's even quieter than our insulated can fan. The digital controller keeps it from humming when turned down. We have one of these as the intake for an 8 x 4 tent, and another brand as the exhaust, with a lot of hot lights, and it keeps the tent very cool, (almost too cool) without the use of air conditioning. It's pulling thru a 14x20x2 filter, and it moves an incredible amount of air. On high, I'm afraid it'll pop the tent like a balloon if I don't have the doors open. The other 8" fan (Hurricane) can't keep up, and the Hurricane is much louder. I'll be buying more of these for sure.

Rearranged my setup recently to consolidate from two separate rooms into one. With that came a need to evacuate heat in a 5 x 8 closet. Since I was only using a T5 VHO with 8 48" bulbs I thought one of those 4" AC infinity fans would do the job. Not even close. I might as well have thrown that $89.99 out of a window. Anyways I took the time to do a little research and came to the conclusion based on that, that this fan should be the one. Fortunately I was right. Paid a little extra for shipping because I was against the clock with the heat now at problem levels. The thing about this fan is it's ability to overcome static pressure. This is the most important aspect of moving air with inline fans. Not only does this fan blast air, it does it using less electricity that most other fans. With the 4" fan, I could turn it on full and you wouldn't know by looking at any flexible ducting that it was even on. With this 8" Hyper Fan there is absolutely no doubt whether or not its on. I hooked up a 25' 8" 4 layer flexible duct that just came out of the box and wasn't fully stretched out yet and when I turned on the fan it inflated like a balloon. So hard that you would have to turn the fan off or down if you wanted to do anything with the ducting. You couldn't manipulated it if the fan was fully on. It would be like wrestling with a 8" fire hose. Of course it has a variable speed control so you don't have to run it full blast. But if you need an inline fan that you can be sure will do what we buy inline fans for, this one is it. Yeah it's not the cheapest but in the long run since it works so flawlessly and uses less juice and has a 5 year guarantee. I'd say it's worth every penny.

Quality product.Update: Upping to 5 stars after a solid 12 months of use. Reliable, quiet (after working thru flow issues, see below), adjustable speed, and powerful!Original comment: Only a week in, so will update later if reliability problems come up. Using for distributing wood stove heat through ducts to other parts of the house.Seems to be on the loud side however - I am finding with this much air flow (10 inch is over 1000cfm), little things become big noises and so far it's not the fan's fault. E.g. The metal registers on the two 4"x12" registers for intake over the stove were vibrating at higher speeds. The vibration sounded like a distant tornado siren - not pleasant, and hard to pinpoint. Until removing the registers, I had to consider the fan as the source, but after changing the registers the siren sound is gone, so not the fan's fault. Now I am working on what sounds like a jet going overhead downstream of the fan (all insulated flex ducting). I'm thinking it may be due to back pressure at the fan, which goes directly into a 10-8-6 tin wye. Will update as I install more downstream ducts as this should reduce the back pressure. If I get this sounding better it will be a 5 star review. Update: indeed another downstrem outlet helps to reduce jet sound.. proof, when I close register rumble is louder.