Fantech Rn2SL Slimline Radon Fan

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.

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

**update** 5 months later and all is good. This is the direct replacement for the Fantech HP190 according to Fantech. The only difference is that this model has 4in intake and 4in output rather than 3in and 3in. So make sure that you have the proper couplings that correspond with the fan and your PVC. The product doesn’t come with a power cord, so use your old one or buy a new one. The unit is definitely a little shorter than the HP190 so I had to prop it up with a piece of wood, no big deal. This fan definitely runs quieter and has less vibration. I can hear the airflow through the wall it runs through but it’s faint and barely noticeable.

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.

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.

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.

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.