1. Introduction
The RadonAway GP301 Radon Mitigation Fan is specifically engineered for continuous operation in sub-slab depressurization systems, effectively reducing radon gas levels in residential and commercial buildings. This manual provides essential information for the safe and effective installation, operation, and maintenance of your GP301 fan. Adherence to these instructions will ensure optimal performance and longevity of the unit.
2. Safety Information
Please read and understand all safety warnings and instructions before installing or operating the RadonAway GP301 fan. Failure to do so may result in property damage, injury, or death.
- WARNING: Installation and electrical wiring must be performed by a qualified, licensed electrician or HVAC technician in accordance with all national and local electrical and building codes.
- Always disconnect power to the unit before performing any service or maintenance.
- Do not operate this fan in hazardous or explosive atmospheres.
- Ensure the fan is properly grounded to prevent electrical shock.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves, during installation and maintenance.
- Keep hands and foreign objects away from the fan blades during operation.
3. Product Overview
Features
- Designed for mounting on duct pipe or with an integral flange.
- Features 3-inch diameter ducts, suitable for use with both 3-inch and 4-inch piping systems.
- Equipped with an electrical box for either hard-wire connections or plug-in applications.
- ETL Listed, certifying its suitability for both indoor and outdoor installations.
- Seams are sealed under negative pressure, enhancing system integrity and performance.
What's in the Box
- RadonAway GP301 Radon Mitigation Fan
4. Setup and Installation
Proper installation is crucial for the effective operation of your radon mitigation system. It is highly recommended that installation be performed by a certified radon mitigation professional.
General Installation Steps:
- Site Selection: Choose a suitable location for the fan, typically outdoors or in an unconditioned space like an attic or garage, to prevent radon re-entry. Ensure adequate clearance for maintenance and airflow.
- Mounting: Securely mount the fan using its integral flange or appropriate mounting hardware to a stable surface. Ensure the fan is level and vibration-free.
- Duct Connection: Connect the fan to the radon suction pipe (typically 3-inch or 4-inch PVC) using appropriate couplings and sealants. Ensure all connections are airtight.
- Electrical Connection: Wire the fan to a dedicated electrical circuit in accordance with local codes. The fan is designed for 120 Volts and features an electrical box for hard-wiring or plug-in. Ensure proper grounding.
- System Sealing: Thoroughly seal all cracks, openings, and penetrations in the concrete slab and foundation walls to maximize the effectiveness of the sub-slab depressurization system.
- System Monitoring: Install a U-tube manometer or other pressure gauge to monitor the system's vacuum pressure, indicating proper operation.

Figure 1: Front view of the RadonAway GP301 fan, showing the main housing and electrical box.

Figure 2: Angled view of the GP301 fan, illustrating the inlet and outlet ports for duct connections.

Figure 3: Side view of the GP301 fan, displaying the product label with specifications and certifications.
5. Operating Instructions
The RadonAway GP301 fan is designed for continuous, 24/7 operation to maintain consistent radon reduction. Once properly installed and powered, the fan will continuously draw air from beneath the slab, creating a negative pressure that prevents radon gas from entering the living space.
- Initial Startup: After installation and electrical connection, turn on the power to the fan. The fan should begin operating quietly.
- System Monitoring: Regularly check the U-tube manometer or other pressure gauge installed on your radon system. The liquid levels in the manometer should be uneven, indicating that the fan is creating a vacuum. If the levels are even, the system may not be operating correctly.
- Continuous Operation: For optimal radon reduction, the GP301 fan should remain powered and operational at all times. Intermittent operation may lead to fluctuating radon levels.
6. Maintenance
The RadonAway GP301 fan is engineered for reliable, low-maintenance operation. Regular inspections can help ensure continued performance.
- Periodic Inspection: Annually, or if you notice changes in system performance, visually inspect the fan and all associated piping for any signs of physical damage, cracks, leaks, or unusual wear.
- Noise Check: Listen for any unusual noises (e.g., grinding, rattling, excessive vibration) that might indicate a problem with the fan motor or impeller.
- Obstruction Clearance: Ensure that the fan's intake and exhaust vents are clear of debris, leaves, snow, or other obstructions that could impede airflow.
- No User-Serviceable Parts: The fan motor and internal components are not user-serviceable. Do not attempt to disassemble the fan. If a malfunction occurs, contact a qualified professional for diagnosis and repair or replacement.
- Electrical Connections: Periodically check electrical connections for tightness and signs of corrosion, ensuring power is disconnected first.
7. Troubleshooting
If you experience issues with your RadonAway GP301 fan, consult the following troubleshooting guide. For problems not listed here, contact a qualified professional.
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan is not running | No power to the fan Faulty wiring or connection Fan motor failure | Check circuit breaker and power switch. Ensure fan is plugged in or hard-wired correctly. Verify electrical connections (with power off). If power is present and connections are good, fan may need replacement by a professional. |
| Unusual noise or vibration | Obstruction in fan or ductwork Loose mounting Motor bearing wear | Disconnect power and inspect fan and ducts for obstructions. Ensure mounting hardware is tight. If noise persists, professional inspection or replacement may be necessary. |
| Manometer shows no vacuum (even liquid levels) | Fan not running (see above) Large leak in radon piping or slab sealing Blocked suction point | Verify fan operation. Inspect all piping and slab seals for leaks and repair as needed. Check the suction point under the slab for obstructions. Consult a radon professional for system assessment. |
| Radon levels remain high after system installation | Inadequate sealing of slab/foundation Insufficient fan capacity for sub-slab conditions System design issues | Re-evaluate and improve slab and foundation sealing. Consult a radon mitigation professional to assess if a higher capacity fan or additional suction points are required. |
8. Specifications
The following specifications apply to the RadonAway GP301 Radon Mitigation Fan:
| Specification | Detail |
|---|---|
| Brand | RadonAway |
| Model | GP301 |
| Voltage | 120 Volts |
| Wattage | 55 watts |
| Noise Level | 41 Decibels |
| Material | Aluminum |
| Item Weight | 6 Pounds |
| Power Connector Type | 2-Pin |
| Included Components | Fan |
| UPC | 667829230065 |
| ETL Listed | Yes (for indoor/outdoor use) |
9. Warranty Information
The RadonAway GP301 Radon Mitigation Fan comes with a Five Year Limited Warranty. This warranty covers defects in materials and workmanship under normal use and service conditions.
For complete terms, conditions, and limitations of the warranty, please refer to the official warranty document provided with your product or visit the RadonAway official website. Keep your proof of purchase for warranty claims.
10. Support and Contact
For technical assistance, replacement parts, or warranty claims, please contact RadonAway customer support. When contacting support, please have your product model (GP301) and any relevant serial numbers readily available.
You can typically find contact information on the manufacturer's official website or on the product packaging. For complex issues or system design questions, it is always recommended to consult with a certified radon mitigation professional.







