Fantech Rn2 Radon Mitigation Fan, 4.5 in Duct, 123 CFM, Residential System

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.

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.

Performance: While the fan is rated for lower Cubic Feet per Minute (CFM) than what it replaced, it excels in Static Pressure capability. On a standard U-tube manometer, the suction increased from 1.18" WC to 1.25" WC. Acoustics: The noise reduction is the standout feature. With my measured exterior noise dropping from 64.7 dB to 56.1 dB represents a near 50% reduction in perceived loudness.

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.

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.

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.

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.

Bought this mainly because the Radon-Away only has a 1 year warranty if you install it yourself. Fantech has a 5-yr, which goes to 6 years if you register. Installed it in my sump pit and Radon levels dropped from 40 to 0.5. So I added a "Cdmall Electronic Fan Speed Controller Variable Adjuster for Hydroponics Inline Duct Exhaust Ceiling Fans with 6' Long 120V 15A Cord" which let me reduce the fan speed so it runs quieter and uses less power. It wasn't that loud to start with but now you can barely hear it, and the Radon level is about 0.8. I installed it inside the basement thinking it would hold up better not being exposed to temperature extremes. I know the EPA wants you to put it outside but I did this to reduce Radon, not to please the EPA. Plus I have confidence in my mad skills at gluing PVC pipe together. Left room outside so I can move the pump outside if I sell the place. Bought the install kit which made the it very easy to hook up. Hardest part was cutting a hole through the basement wall. I also want to mention that the screws for attaching the lid over the electrical connection compartment were in a plastic bag kind of wedged in the bottom of the compartment; not that easy to see. Another reviewer said they were missing. Also, this does not need to be grounded and there is no place to connect a ground wire. I just used a 2-conductor cord I'd salvaged from some other appliance - finally my hoarding tendency has been vindicated.

The above photo is taken 20days after the fan wad installed. I have 1100 sfm footprint concrete slab in the basement. This DIY job is to improve the indoor air quality, hopefully to reduce the radon level from 150-200 Bq/m³ to somewhere minimum level. The piping (3" PVC S40) starts from furance room and runs into garage up at attic to the roof. The work runs smoothly and has taken 4 days to complete including material preparation. Upon running the fan, the current level (measured at 2nd floor) has droped down 70% at 12th hour, and 90% at 24th hour almost nothing left. Therefore, the objective of this job is achieved. Among many radon fan products, Fantech Rn2 is selected based the size of the footprint, noise level, sucking capacity and warranty length provided. Looking at the redult, a right fan is chosen. The fan is nicely manufactured and looks like fine quality. The amazing one is the noise level, extremly quiet!

I only used it one day. This fan makes very high-pitched. It bother my neighbor and my family. If you want to get more powerful than RadonAway RP145, maybe you should choose RadonAway RP265. The Fantech rn3 is not good for you.

We started monitoring our Radon levels Jan 2021 using the Corentium digital meter. Values were typically running around 50 to 125 bq/m3. In early Oct 2011 they shot up to 250 to 400. We decided it was time for action. After researching DIY videos and reviews by others, we decided to go with sub slab depressurization using the Fantech RN2 Radon fan. Installation was fairly simple. The most difficult part was drilling holes in the floor and wall for the piping. I turned the fan on yesterday at 4:00 PM and 18 hours later the Radon levels had dropped to 25. The fan itself is very quiet although there is some wind noise through the pipe however it is in the laundry room and you can only hear it if you walk by the door. With the door shut, you can't hear it even outside the door. We are quite pleased. Total cost was less than $1000 even including a set of 5 carbide core drills and a hammer drill to accommodate SDS drill bits.

J’avais déjà fait mettre un tuyau pvc perforé de 4’’ sous la dalle avec du 3/4 net, il y a 4 ans. Cette année le taux de radon ayant augmenté considérablement par rapport aux années passées, j’ai finalisé en connectant cette aspiration et le résultat est vraiment bon. Cela a chuté à zéro en deux à trois jours. Par contre, je m’aperçois que le tuyau installé sous ma dalle aurait pu être disposé à différents endroits car il semble que l’aspiration ne se fasse pas au plus loin de ma dalle et j’enregistre encore à l’étage un taux entre zéro et douze becquerel. C’était malgré tout à 88 avant la mise en place. Le sous-sol quant à lui oscille entre zéro et quatre, mais plus souvent à zéro au lieu de 92 avant. Cf photo avant et après

The fan is totally quiet although not 25db as advertised in the description it is actually 42db. The description is also wrong as this unit does not come with a power cord. The 4 1/2" diameter on the input and output sides of the housing is difficult to find adapters but if you heat the 4" adapter with a hair dryer you can stretch the rubber enough to fit. Otherwise works very well.