1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your RadonAway GX4 Radon Fan Pro Series. The GX4 fan is designed for high suction radon mitigation applications, featuring a 3-inch inlet and outlet. It is engineered to replace models like the GP501, offering enhanced performance for effective radon reduction in residential and commercial settings.
Please read this manual thoroughly before installation and operation to ensure safe and efficient use of the product.
2. Safety Information
WARNING: Risk of Electric Shock. Installation and servicing should be performed by qualified personnel only.
- Always disconnect power before servicing or installing the fan.
- Ensure all electrical wiring complies with local and national electrical codes.
- Do not operate the fan with a damaged cord or plug.
- This fan is rated for indoor and outdoor use. When installed outdoors, ensure proper weather protection for electrical connections.
- Do not use this fan in hazardous environments where flammable gases or vapors may be present.
- Keep hands and foreign objects away from the fan blades during operation.
3. Setup and Installation
The RadonAway GX4 fan is designed for professional installation as part of a complete radon mitigation system. Proper system design and installation are critical for effective radon reduction.
3.1. Pre-Installation Check
- Verify that the fan model (GX4) is appropriate for your specific radon mitigation requirements, considering static pressure and airflow needs.
- Inspect the fan for any shipping damage. Do not install if damaged.
3.2. Mounting the Fan
The fan should be mounted vertically with the inlet facing downwards. Ensure adequate clearance around the fan for airflow and future servicing. The fan features a 3-inch inlet and outlet for connection to standard PVC piping.

Image: Side view of the RadonAway GX4 fan, showing the main housing and the integrated electrical connection box. This view highlights the fan's compact design and the location for wiring.

Image: Bottom view of the RadonAway GX4 fan, illustrating the 3-inch inlet port. This perspective is important for understanding pipe connection points.
3.3. Electrical Connection
Connect the fan to a dedicated electrical circuit as per local codes. The fan is designed for continuous operation. The electrical hookup location may differ from older models like the GP501; refer to the fan's integrated electrical box for wiring connections.

Image: Top view of the RadonAway GX4 fan, showing the outlet port and mounting points. This view helps in planning the exhaust piping and securing the unit.
3.4. System Sealing
The GX4 fan utilizes Vapor Tite™ sealing technology and Eternalast™ polycarbonate plastic housing. Ensure all system components, including piping and slab penetrations, are properly sealed to maximize system efficiency and prevent radon re-entry.
4. Operating Instructions
The RadonAway GX4 fan is designed for continuous, 24/7 operation to maintain consistent radon reduction. Once installed and powered, the fan will operate automatically.
- Continuous Operation: For optimal radon mitigation, the fan should run continuously. Intermittent operation may lead to fluctuating radon levels.
- System Monitoring: Regularly check your radon mitigation system's manometer or other pressure gauges to ensure the fan is creating the expected suction. A visible indicator on the manometer confirms fan operation.
- Noise Levels: While designed for quiet operation, some operational noise is normal. Significant increases in noise may indicate a problem requiring inspection.
5. Maintenance
The RadonAway GX4 fan is largely maintenance-free. However, periodic checks of the overall system are recommended.
- Annual System Check: It is recommended to have your radon mitigation system, including the fan, inspected annually by a qualified professional.
- Visual Inspection: Periodically inspect the fan and associated piping for any visible damage, cracks, or blockages. Ensure all connections remain secure.
- Performance Check: Monitor your radon levels periodically using a radon test kit to confirm the system's continued effectiveness.
- Cleaning: The exterior of the fan can be wiped clean with a damp cloth. Do not use harsh chemicals or abrasive cleaners.
6. Troubleshooting
If you experience issues with your RadonAway GX4 fan, refer to the following common troubleshooting steps. For persistent problems, contact a qualified radon mitigation professional.
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan is not running | No power to the fan Faulty wiring or switch Fan motor failure | Check circuit breaker/fuse. Ensure power switch is ON. Verify electrical connections. Consult an electrician. Contact RadonAway support or a professional for replacement. |
| Excessive noise from fan | Improper installation/mounting Obstruction in fan or ductwork Worn bearings or motor issue | Ensure fan is securely mounted and isolated from structural elements. Inspect for debris in piping or fan. Contact RadonAway support or a professional for inspection/replacement. |
| Radon levels remain high | System leaks Inadequate suction for soil conditions Fan malfunction | Inspect and seal all cracks, gaps, and penetrations in the slab/foundation. Consult a professional to assess system design and fan sizing. Check fan operation (see 'Fan is not running'). |
7. Specifications
The RadonAway GX4 Radon Fan Pro Series is built with durable materials and designed for high-performance radon mitigation.

Image: Technical specifications sheet for RadonAway GX Pro Series fans, including performance curves, fan dimensions, and model-specific data for GX3 and GX4.
- Model: GX4
- Fan Duct Diameter: 3 inches
- Watts: 74-158 W
- Recommended Max. Static Pressure: 4.8 "WC
- Typical CFM vs. Static Pressure WC: Refer to the performance curve in the image above for detailed airflow data.
- Material: Eternalast™ Polycarbonate Plastic Housing
- Item Weight: 9 pounds
- Package Dimensions: 14 x 13 x 13 inches
- Indoor/Outdoor Usage: Indoor
- Certifications: CSA, ETL, UL Listed
- Controller Type: Button Control (Note: Refers to system control, not fan itself)
- Control Method: Touch (Note: Refers to system control, not fan itself)
- Cordless: No

Image: Overview of RadonAway GX Pro Series fan features, highlighting Vapor Tite™ Technology, Eternalast™ housing, thermally-protected motor, quiet operation, and certifications.
8. Warranty and Support
All RadonAway® inline radon fans, including the GX4 Pro Series, are covered by a 5-year, hassle-free warranty. This warranty covers defects in materials and workmanship under normal use and service.
For warranty claims, technical support, or any questions regarding your RadonAway GX4 fan, please contact RadonAway customer service directly. Ensure you have your purchase information and model number available when contacting support.
Contact Information: Please refer to the official RadonAway website or your purchase documentation for the most current contact details.







