Automatic Duct Fan 4", Inline Fan with Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems

Easy to install. Automatic turn on/off via pressure sensing is great. This allows me to installed it in the attic. My pipe run up 10' wall then turn 45 degree for 5' then run to the roof for another 4' or so. I guess this was too long for the new LG dryer because if keeps throwing the d80 code. The fan was installed on a 45 degree without any problem with the flexible hose + clamps. No mode d80 code from the LG dryer and the clothes dry so much faster.

I needed to supplement my dryer vent, as my vent ran pretty long to the outside of my house. I installed this in the middle and it works great! It is pretty quiet and has enough air flow to do the job. The pressure switch works well and adds to the convenience. Installation is easy! I'm very happy!

Fixed the error code on our brand new LG dryer and we’ve noticed an improvement in drying overall. Easy to install and set up. Solid investment.

Works as designed ,easy to install and quiet. Highly recommend

Install was easy and the product works well. The one issue I have is the pressure sensor. It worked initially but with changes in weather (unit is in my crawl space) it turns on constantly. I ended up having to put it on a smart plug and manually turn it on/off when I’m running the dryer.

Works great as a dryer vent booster. I relocated the dryer vent as the rear deck is now blocking it, vent hose now travels quite a bit of distance and a few sharp turns. My cloths are not getting dryed as before. Installed this inline fan. It turns on automatically when my dryer turns on. Then it turns off after a minute. I'm a bit concerned about it getting too hot. Been drying it in medium heat setting. Cloths are still getting very dry. Works perfectly.

I needed an inline duct fan to handle the hot exhaust from my dieselpusher RV propane furnace. I house the RV in a metal pole barn, but still live in it full time during the cold Midwest winter. The furnace exhayst temparature gets up to about 180F. Although the AC Infinity fan is rated for a maximum 140F, it runs great at the lowest set speed even with the higher furnace exhaust temperature. I bought the fan with the differential pressure sensor. It senses air flow from the furance and automatically turns on and also turns off 5 minutes after furnace airflow stops. This fan is solidly built with quality components. I highly recommend this exhaust fan! Always spend a little more for quality.

Work exactly as described, installed horizontally in my attic, it start as soon as my dryer start, it stop every 5 minutes and senses the pressure if no pressure it continues stopped but if my dryer is still working then it start again for 5 more minutes, it is a cycle. I set it on automatic.

Triggers reliably, relatively quiet. I'm using this as a make up air unit for my laundry room. I put the pitot tube on my dryer, while the fan is just behind a damper on an intake duct. Because of the intended use as a booster, this is programmed to shut off for a bit every five minutes to see if there is still flow with the motor off. For my use I wish there was a mode that doesn't need to shut off to sense, as the fan is on a different duct. This is still a very affordable universal make up air unit.

It works! Used to boost airflow to far end of house from a concealed duct heat pump. The automatic pressure detect works perfectly. I can even set my heat pump to 1% fan speed and the unit still detects the pressure difference and turns on! Glad i found it. Seems like a better option than the floor register boosters.

Noise/results My house is a 1955 slab build, with an add on kitchen/basement in the mid 70's. The downflow hvac system didnt have enough gusto to push heat to the add on registers, or there were restrictions/collapse in the old perimeter in slab ducting. I put this on the only exposed ducting i could access in the addon, about 50' direct line, but would probably be 75 or so of ducting run. The unit itself is quiet, fairly easy to install and the pressure swtich works great. I have it on setting 3 and it works well puahing more heat to the area but also drawing more heat through the whole ducting system, making all the registers work better. It has prevented our furnace/Thermostat (ecobee) from over heating and shutting off which has been an annoying regular winter occurrence. It is actually a pretty loud system, as the fan winding travels through the ducting and out the register. I have this on a 20' run with two registers, and the noise it produces is substantial. My wife coverwd up a register this morning just so she could watch a show. I'm going to try and insulate the ducting to hopefully absorb some sound vibrations. This solved and problem, and presented another. So we'll see what happens.

I bought to increase air flow to the upstairs but find that the pressure in the duct isnt enough to start unit automatically so it just runs all the time.