Fantech RN2 Radon Fan | 4 Inch | Quiet and Efficient Radon Mitigation | 220 Cfm White

Ordered this to replace an existing unit that had a loud horrible humming noise. Installation was quick and easy and now it’s super quiet. Worth every penny.

Had one of these put on my house about five years ago and the bearings wore out. This was a drop-in replacement and was pretty simple to install. Very quiet operation. Seems like it'll last another five years at least.

I had an old Fantech HP190 radon fan in my attic that was getting very loud. I replaced it with the new Rn2 model and am quite happy. The Rn2 seems well built. The Rn2 is slightly shorter and has different size connectors than the HP 190, but I had no problem finding some flexible PVC couplings that worked perfectly at the local hardware store (I used a 4" x 4" on bottom and 4" x 3" on top). The bigger problem was that whoever originally installed the fan used 3" PVC pipe with 4" adapters cemented in the ends. That gave the fan a little more stability, but made it impossible to slide the coupler up the pipe to remove/replace the fan. I ended up having to cut off the top 4" PVC adapter along with some 3" pipe back far enough that would allow me to add a standard 3" PVC coupler and 3" PVC pipe to get it to the right height so that the fan could easily slip in, but still allow the coupler to slide up the pipe for installation/removal. Wiring up the new fan was no problem, I just used the plug from the old fan. The new fan is working great and quiet. Fantech included a tootsie pop and an "Our fans suck" stick in the box for fun.

Works good! Easy to install and great instructions. Only complaint is it is not. As quiet as the old one and I had higher expectations. Good for money but If the install location requires super quiet, I’d get a different model. Mine is above my master bath in attic and is doable but I definitely notice it periodically. If it’s an outside install, wouldn’t give it a moment of consideration. Good fan for sure.

Purchased to replace existing fan with noisy bearings. Easy installation. Has been running problem free since 2022.

For whatever reason, manufacturers often feel the need to change the product sizing/dimensions from time-to-time. That's fine if you're making a first-time purchase, but if you're buying a part to replace a failed part, you want the new one to fit exactly like the old one, to minimize the replacement effort. This Fantech radon fan is a great example of the manufacturer realizing that many of the people buying this unit are buying it to replace an older one. In my case, I was helping an elderly neighbor replace his 25+ year old radon fan that finally failed, and I was very happy to find I could buy something that was an exact fit, relative to the 25 year old one. On a very minor note, the new one, although it fit perfectly, is a bit noisier than the old one, and a bit noisier than the other two units I've installed. Not obnoxiously loud, just noticeable that it's running, whereas the older ones were quieter. The unit is installed outside, so the little extra noise is not an issue for the homeowner.

Update: Replacement fan worked for three months. Now makes a loud, high pitched sound all the time and the air flow is greatly reduced. Orig: Installed brand new. Wired it up. It makes a humming noise but just won't spin. Spins by hand, but the motor never works.

I tested for radon when I first moved in and it was low. Unfortunately that was in summer when levels were low. I'm in Oregon where radon's lower than other areas so I didn't pay it much mind. I got an airtthings radon detector on a whim at Home Depot and as soon as it started raining in fall levels crept up and when it went past 4.0 I knew I had to do something. I almost called a company but saw that estimates would be around $1500-$2500 to hire it out. I looked at the materials and saw the job would run me about $250 to diy. I took a couple weekends to do everything but the whole job ended up around $140. I have a floating floor through most of the finished daylight basement but it was manageable to pull up the carpeted areas to seal cracks and found a good spot for the suction pit in the central hvac room. Radon levels weekly averages are 1-1.3pCi/l and overall averages are down to 1.1pCi/l. I'm satisfied. Looks like I got the RN2 at a good price compared to now but the fan is great quality, has strong suction and easily installed as a homeowner. I can't recommend this enough.