RN Series 4EC-3 Inline Radon Fan (555 CFM)
Product Highlights
120v
172 Watts
2.1
555 CFM
4084 RPM
122°F Max Temp
Description
RN Series 4EC-3 Inline Radon Fan (555 CFM) is designed for use with 3" schedule 40 PVC pipe.
Rn4EC-3Radon Fan is the most powerful product on the market for active radon mitigation applications where high suction and high flow are required. It is an excellent solution for high radon levels, poor sub-slab communication, multiple suction points and/or large sub slab footprint.
Features:
- Designed specifically for Active Soil Depressurization (ASD) mitigation applications
- High Suction, High Flow
- Dial your suction in with a built-in speed control
- Two soft anti-vibration couplers included
- Set up for a 3” PVC pipe
- For residential and commercial applications
- Air-tight housing - zero leakage
- UV resistant plastic housing
- UL Listed for safety and outdoor use
- HVI certified fan performance
- 5-year factory warranty
Rn4EC-3 can create 4.75” of suction while moving 20 cfm, or moving from 125 to 200 cfm when operating at only 0.5” of suction.
Inherently efficient and operationally stable at full and reduced speeds, Rn 4EC-3 fan arms the radon professional with installation methods not previously practical. Integrated control system allows for “dialing in” the fan speed necessary to achieve either the required sub-slab depressurization or required system air flow rate.
Manufactured from two molded plastic pieces seamlessly joined together. It is inherently and permanently airtight ensuring no Radon gas leakage. A large watertight electrical wiring enclosure ensures electrical installation quick and simple. Fan motor is thermal overload protected with automatic reset and can be installed both indoors or outdoors. Two anti-vibration couplers are included with the fan.
Specs
| Voltage: |
120v |
|---|---|
| Wattage: |
172 |
| Max. Amps: |
2.1 |
| Air Flow Capacity (CFM): |
555 |
| Frequency: |
60 Hz |
| RPM: |
4084 |
| Phase: |
1 |
| Max Temp (F): |
122°F |
| Insulation Class: |
B |
| Warranty: |
5 Year |
Why Choose the Fantech RN4EC-3 for Your Radon Mitigation System
Ideal Use Cases
The RN4EC-3 is engineered for the most demanding radon mitigation scenarios. Consider this fan when your home has:
- Elevated radon readings (well above the EPA action level of 4 pCi/L) requiring stronger vacuum and airflow
- Poor sub-slab communication — meaning the soil beneath the foundation doesn't allow air to move freely between suction points, requiring extra suction power to depressurize the whole slab
- A large basement or slab footprint where a single, more powerful fan is more effective and less costly than installing multiple smaller fans
- Multiple suction points feeding into one central fan
- A crawlspace combined with a basement, requiring higher flow capacity to manage both spaces simultaneously
Built-In Speed Control: A Key Advantage
Unlike fixed-speed radon fans, the RN4EC-3 features an adjustable dial that lets an installer fine-tune performance after the system is in place. This means:
- The fan can be "dialed in" to hit the exact sub-slab pressure or airflow rate your specific home requires
- If initial post-installation testing shows radon levels aren't low enough, suction can be increased without swapping out the fan
- Running at reduced speed when full power isn't needed can lower energy consumption and noise
Construction and Durability
- Air-tight, two-piece molded plastic housing — permanently sealed to prevent any radon gas leakage back into living spaces
- UV-resistant housing rated for safe outdoor installation, in addition to attic, garage, or basement mounting
- Thermally protected motor with automatic reset — the fan safely shuts down and restarts if it overheats, rather than failing permanently
- Large watertight wiring enclosure for straightforward, weatherproof electrical connections
- UL Listed and HVI certified, confirming both safety compliance and verified performance data
Installation Considerations
Because the RN4EC-3 is a high-suction, high-flow unit, correct installation matters more than with smaller fans. Our licensed technicians will evaluate:
- Sub-slab conditions — soil permeability and slab size to determine suction point placement
- Duct routing — sizing and layout of the 3" schedule 40 PVC piping for maximum efficiency
- Fan placement — typically in an unconditioned attic or exterior location to minimize noise
- Speed calibration — dialing in the correct suction level based on post-installation radon testing
- Code compliance — ensuring exhaust termination height and location meet local and EPA/AARST guidelines
RN4EC-3 vs. AprilAire ARN25F — Which Is Right for You?
| Fantech RN4EC-3 | AprilAire ARN25F | |
|---|---|---|
| Best for | High radon levels, large or complex sub-slab systems | Standard residential systems, 1,500–2,500 sq. ft. |
| Pipe size | 3" PVC | 6" duct |
| Speed control | Adjustable dial | Fixed speed |
| Airflow | Up to 555 CFM | Lower flow, standard-duty |
| Warranty | 5 years | 5 years |
Not sure which fits your home? Our team will assess your radon test results and sub-slab conditions to recommend the right fan — see also our AprilAire Radon Mitigation Fan Kit and Airthings Wave Radon Detector for ongoing monitoring after installation.
Frequently Asked Questions
Is the RN4EC-3 too powerful for a typical home?
Not necessarily — its adjustable speed control means it can be dialed down for standard homes while still providing extra capacity if radon levels turn out higher than expected.
Can it be installed outdoors?
Yes, the UV-resistant housing and UL outdoor-use listing make exterior installation possible, which is common to reduce indoor noise.
How is fan speed adjusted after installation?
Our technicians calibrate the built-in speed dial during installation and can readjust it if follow-up radon testing shows levels need to be lowered further.
Next-Generation EC Motor Efficiency & High-Performance Radon Depressurization
The Fantech RN Series 4EC (3") Inline Radon Fan represents the highest standard in modern radon mitigation technology. Equipped with an Electronically Commutated (EC) motor, the RN4EC-3 delivers exceptional suction power while consuming up to 65% less electricity than traditional AC-driven radon fans. Engineered specifically for active soil depressurization (ASD) in residential structures with 3-inch PVC piping, this fan provides whisper-quiet, 24/7 continuous operation to extract harmful radioactive gas from under your home's slab. Call our certified radon mitigation specialists at (224) 754-1984 for expert installation or fast fan replacement:
Advanced EC Motor Technology: Features an energy-saving motor with built-in speed control capabilities, allowing precise tuning of sub-slab suction and airflow.
Designed Specifically for 3" Schedule 40 PVC Lines: Direct-fit housing designed for standard 3-inch residential radon vent stacks, ensuring a tight seal with rubber couplings.
Ultra-Low Operating Energy Costs: Saves up to $50–$100+ annually on electric bills compared to older high-wattage AC radon fans without sacrificing suction pressure.
Weather-Proof UV-Stabilized Polycarbonate Casing: Water-tight, impact-resistant enclosure engineered to endure harsh Chicagoland winters, rain, and intense summer UV exposure.
Commercial-Grade Reliability & 5-Year Warranty: Backed by Fantech's renowned engineering standards and a 5-year factory warranty.
Fantech RN Series 4EC Technical Features & Capabilities
Designed for versatile mounting on exterior building walls or unconditioned attic spaces:
Technical Parameter Performance & Specification Details Operational Advantage Fan Model & Type Fantech RN4EC-3 Inline Centrifugal Radon Fan High static vacuum suction with EC motor efficiency. Duct Connection Size Tailored for 3" Schedule 40 PVC Piping Ideal for standard 3" residential sub-slab suction points. Motor Type & Power Electronically Commutated (EC) Motor (120V) Maximum torque with minimal energy consumption (under 30W). Airflow Capacity (CFM) Up to 160+ CFM (at 0.0" w.g. static pressure) Effective soil gas extraction across gravel and tile sub-slabs. Housing Material UV-Resistant Engineered Polycarbonate Seamless housing prevents radon gas leaks and weather damage. Speed Controllability Dial/Potentiometer Speed Adjustable Custom tuning to match exact sub-slab soil airflow resistance.
Key Benefits of Upgrading to the Fantech RN4EC-3 Radon Fan
Upgrading your radon mitigation system with a Fantech RN4EC-3 fan delivers significant advantages for safety, home comfort, and long-term energy savings:
Dramatically Reduces Indoor Radon Levels: Consistently pulls soil gas away from foundation cracks to maintain radon concentrations well below the 4.0 pCi/L EPA action threshold.
Whisper-Quiet & Vibration-Free: Precision-balanced backward-curved impellers ensure smooth, quiet operation with virtually no noise transfer inside your living spaces.
Substantial Electrical Savings: Consumes significantly less power than legacy fans, quickly paying for itself in lower monthly utility bills.
Full Code & Real Estate Compliance: Certified installation satisfying all IEMA (Illinois Emergency Management Agency) and local building code criteria for property transactions.
Our Professional Fantech RN4EC-3 Installation & Replacement Service
Sub-Slab Diagnostic Assessment: Checking concrete slab aggregate, suction pit depth, and verifying 3-inch PVC vent stack integrity.
Precision Fan Mounting & Vibration Isolation: Securing the Fantech RN4EC-3 vertically on exterior walls or attic studs using flexible rubber couplings to absorb motor vibration.
Air-Tight Ducting & Weather Sealing: Connecting 3" PVC vent lines extending above rooflines according to strict EPA/AARST discharge guidelines.
Speed Tuning & Manometer Installation: Calibrating motor speed settings and mounting a U-tube fluid manometer on the indoor suction pipe to monitor vacuum pressure.
Post-Mitigation Verification: Verifying system draft performance and initiating post-installation radon level verification tests.
Frequently Asked Questions: Fantech RN4EC-3 Radon Fan
Q: Can the Fantech RN4EC-3 replace my old, noisy 3-inch radon fan?
A: Yes. The RN4EC-3 is an ideal retrofit replacement for any existing 3-inch inline radon fan (such as older RadonAway or Fantech models). Our technicians can perform the swap in under an hour.
Q: How much money does an EC motor radon fan save on electricity?
A: Because radon fans operate 24 hours a day, 365 days a year, an EC motor fan using 20–30 Watts compared to an older 70–90 Watt AC fan can save $50 to $100+ per year on electricity costs.
Q: Where should the Fantech RN4EC-3 fan be installed?
A: According to national radon standards, the fan must be installed outside the living envelope—either on an exterior home wall or in an unconditioned attic or garage—to prevent pressurized radon gas from leaking into your home.
Q: How can I tell if my Fantech radon fan is working?
A: Look at the clear U-tube manometer mounted on the indoor PVC pipe in your basement. If the fluid levels are offset (unequal height), the fan is running and generating proper suction. If fluid levels are equal, the fan has lost power or requires service.
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