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Model # RDK04-3

Internet # 202669564

Store SKU # 683160

Radon Mitigation Fan Kit 4 in. Fan with 4 in. to 3 in. Couplers and Air Pressure Indicator

This item has been discontinued.
The Home Depot no longer carries this specific product.

$127.00 /each




Model # RDK04-3

Internet # 202669564

Store SKU # 683160

Store SO SKU # 655047

The Suncourt Radon Mitigation Fan Kit features a thermal plastic resin housing that is watertight and resistant to UV rays to help protect the motor. The motor casing has an automatic thermal reset for overload protection. The kit includes a 4 in. input/output fan, an air pressure indicator, 2 white 4 in. to 3 in. rubber couplers and mounting hardware for your convenience. It is ETL listed for both indoor and outdoor use.

  • Front line of defense against elevated radon levels in the home or office
  • Effective way to reduce radon related health risks to families
  • Motor has an enclosed casing and an automatic thermal reset for overload protection
  • Works in rooms up to 3500 sq. ft.
  • Thermal plastic resin housing is UV resistant, watertight and epoxy sealed for performance and durability
  • Mounting hardware included
  • Kit includes 4 in. input/output fan, air pressure indicator and 2 white 4 in. to 3 in. rubber couplers
  • Motor operates at 4 sones
  • 5 year limited warranty
  • Conforms to UL 705

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Brand/Model Compatibility 
Suncourt, Radon test kit 
HVAC application 
All HVAC types 
Product Weight (lb.) 
8 lb 
Warranty / Certifications
Manufacturer Warranty 
5 Year Limited 


Rated 4.3 out of 5 by 41 reviewers.
Rated 5.0 out of 5.0 by Nice fresh air fan My goal was to get some fresh air moving in the basement. If this fan could accomplish that goal, I had planned to buy a second fan, to add a full radon removal setup to the sump hole where we have radon. (Radon is only emitted from one of our four sump holes). However, after adding this fan in another area (well away from the radon source), the radon detectors (at the source) now indicate normal radon gas levels. I've checked it twice and our radon problem seems to be gone. Just by adding a little fresh air flow. Currently running the fan 7 hours a day, and the average reading this morning is 1.6 pCi/L (third test). Tested with both detectors hanging 16" above the 'open' sump hole. The 'Before' (fresh air fan) reading was 4.6 pCi/L with the sump hole sealed. (Before flooding necessitated installing the sump pump). June 25, 2013
Rated 4.0 out of 5.0 by Radon Mitigation Fan Kit The price was good Fan installed easily Problem with the fan gives off a hum noise thru entire wall. Very noticeable in the garage where the pipe goes up the wall into the attic of the garage, then out thru the roof. I've tried putting pieces of rubber backed carpet behind the mounting flanges but it is still sending the hum noise on the end of the house wall. I'll have to figure out something for the mounting to stop the resonation hum thru the entire wall. More rubber I guess, anyone with suggestions. This is my first time dealing with this type of fan so I'm not sure weather there all this way no matter what brand you get. So can I recomend it, the price was very good for what you received, now lets see how long it runs for. I saved about 750 dollars by installing it myself, plus I hired a person to go up on the roof to install the roof flang. My total cost was about 350 dollars and took about 10 hrs. at a slow and easy pace (over 3 days). The fan seems to be doing the job according to the vacume meter. I'll do another Radon test in a couple of weeks and I hope it goes from 29 down to below 4. August 12, 2012
Rated 4.0 out of 5.0 by Effective Radon Mitigator We installed the device in our Attic which reduce Radon levels from 13.65 to approx. 2. The product is quite and you can hear the humming sound only at night in absolute silence. The instructions were self-explanatory. September 29, 2015
Rated 4.0 out of 5.0 by Does the job Having a complete kit made installation made things easy. Local code requires a cutoff for the fan so I attached a cord with a molded plug instead of hard-wiring the unit. The only other thing needed beyond what was included was a sealant required when installing the flow gauge. It reduced my radon level from 4.7 pC to 0.3 pC which was at the background radiation level at my area. The only negative is that the unit produces a bit more noise that I would have liked. I think that if the couplings were softer they wouldn't transfer so much from the fan to the pipe. Since the pipe runs through all floors you can hear it anywhere near that pipe. To be fair it's not loud enough to be annoying. On the good side you can easily tell if it's still running. Doing this work myself saved me several hundreds of dollars over using a professional installer and was trivial. I ran an outlet to the area for the fan in the attic, cut the existing pipe and inserted it. It did require submitting plans for approval by our township (kind of overkill for a plug-in fan in my book) and I was required to use an independent tester to certify the radon level was properly mitigated. Expect to spend up to a couple hundred over the price of the fan if you have the same requirements in your area. December 10, 2013
Rated 4.0 out of 5.0 by Good solution to the problem Some of the negative reviews that I had read were due to excessive noise. I installed the fan per the instructions and it is rather quiet. It came with a pressure indicator so you can see that it is pulling a vacuum. February 25, 2015
Rated 4.0 out of 5.0 by Pretty good fan The fan is a little noisy but I think it will last. August 11, 2015
Rated 5.0 out of 5.0 by Nice fan. Very quiet. Easy to install. I used a cord from a broken hair dryer to hook it up because it came with GFCI. Two wires without ground. No problem for the Radon fan. This is a powerful fan, it sucks lots of air so I worry that it will pull too much warm air in the winter. Compared with A/C system basement fan, this unit is very quiet. You cannot notice the fan sound, unless you are a few feet away. The A/C fan is much louder due to the aerodynamic noise. This unit does not impact your activities in terms of its noise level. You won't notice it. I knew the fan is supposed to be installed outdoor. However in my case, my Radon level was not that high, just above EPA limit. So I didn't care much. I put it in the basement. It easily cut the Radon level by 60%. I used a Leviton RTF01-10W ($16) generic fan controller to reduce the speed from Max (38W measured by me) to Hi (20W). There is also a setting of MED (12W) and Lo. MED perhaps is too weak for suction. The single pole fan control itself has no humming noise at all. Radon fan is very quiet at HI. You have to be 1 ft away to hear it. I am satisfied with the fan. Hope it will last. April 25, 2015
  • 2015-11-26 T12:28:43.058-06:00
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