Tjernlund Products, Inc. Tjernlund draft inducers, power venters, ventilation




 RADON VAC™ Side Wall Radon Mitigation System
The Radon Vac provides the first effective and affordable way to reduce radon levels in existing homes. The unique system consists of a plug-in fan, exterior hood and installer-purchased PVC pipe. Because the Radon Vac side wall system evacuates through the basement side wall, homeowners can avoid having PVC pipe run vertically through living areas or outside of their homes to the roof line.  

The Radon Vac fan is engineered to reduce radon across a variety of sub-slab soil types (dirt, gravel, etc.). It features a sealed, galvanized housing and a PSC permanently lubricated, quiet, low watt motor. Unlike traditional radon fans the motor is not exposed to air stream moisture.  
Radon VAC™
Support Documents
Full Line Lit
Radon Products Lit
RMS160 Lit
Ventilation Products Lit
Radon Mitigation Case Study
RMS160 Inst
PVC4 Inst

Complete Doc Library

The corrosion-proof Radon Vac Variable Aspiration Control Hood dilutes the radon gas with fresh outdoor air as it exits the hood and safely propels it away from the structure. Airflow velocity is easily adjustable at the hood to accommodate the length of pipe run and whether the radon is being drawn from a sump pit or below the basement floor.

Installation of the Radon Vac system requires a four inch hole through the home’s basement rim joist and exterior finish, plus enough three inch PVC pipe to run from the radon extraction point to the Vac hood. The fan is typically installed between floor joists. A rubber isolating mounting bracket eliminates vibration transfer and rotates 360 degrees to accommodate any orientation.

Radon Vac™ Case Study

See the Radon VAC Hood - Smoke Demonstration Video

Radon is a national environmental health problem. Elevated radon levels have been discovered in virtually every state.

The EPA estimates that as many as 8 million homes throughout the country have elevated levels of radon. State surveys to date show that 1 out of 5 homes have elevated radon levels.



 Radon Vac Side wall Radon Mitigation System

Dilution is the Solution
The corrosion–proof hood infuses outdoor air into the exhaust to dilute it. This mixture is further diluted as it is propelled away from your home in a jet of air.
Perfect for Existing Home Retrofits
Often radon issues are found in finished homes making the long pipe runs of typical systems costly and impractical. Side wall venting with the Radon VAC requires only a 4” hole through the basement rim joist and a fraction of the PVC.
Quiet, Efficient Operation
PSC permanently lubricated ball bearing motor is not exposed to moisture in the air stream. Uses only 50 watts. Engineered to reduce radon across a variety of sub-slab soil types (dirt, sand, gravel, etc.). Features 6’ power cord.
Variable Aspiration Control
Easily adjust the discharge hood to match your system needs. This allows the Radon VAC to operate in sub-slab or sump pit installations and with different pipe runs while always producing a strong stream of diluted exhaust.
Easy Installation
Both fan and hood directly connect to 3” PVC—no rubber couplers needed as with other fans. Rubber isolated mounting bracket eliminates vibration transfer and rotates 360° to accommodate any orientation. Mount vertically or horizontally.
Sealed Housing for Safety
Custom-fitted gaskets throughout the fan prevent radon gas leakage. Features heavy duty galvanized steel housing and powerful backward inclined steel impeller.
Radon VAC Chart

PVC4 Radon Mitigation System Booster Fan

The lowest cost radon mitigation fan on the market! Improve the performance of passive radon mitigation systems easily and inexpensively with the PVC4 Booster Fan. The PVC4 connects directly with 4” Schedule 40 PVC and comes with a 6’ power cord. Installs in 5 minutes. Add the PVC4 to your system for an instant performance boost!

90 CFM | .3" Max Static | 18 Watts | .3 Amps
PVC4 Radon Mitigation Fan
Radon PVC4 Inside View
PVC4 Inside View 
PVC4 Installed
PVC4 Installed 

PVC4 Dimensions 

RA1 Fan Failure Alarm

Tjernlund’s Mitigation System Alarm alerts the homeowner of a fan failure or other issues. Ideal for remotely located systems that may not be inspected regularly. Audible and visual alarms instantly alert homeowners when a lack of system pressure is detected. Can be wall or pipe mounted. Includes cord, hardware and tubing. Compatible with any model fan or subslab depressurization system layout.

Radon Ventilation Fans
Diluting radon concentrations with outdoor air is an effective and affordable way to decrease radon exposure in homes. Tjernlund Radon Ventilation Fans are the effective, affordable way to reduce radon in homes with moderate (10 pCi/l or less) radon levels.*
RX2 Ventilator
For Basements and Sealed Crawl Spaces

The RX2 Radon Ventilator includes 2 reversible fans that can be set to exhaust radon, supply fresh air, or positioned with one fan in each direction for a balanced air exchange. At 220 CFM, the RX2 ventilates a 20’ x 40’ x 8’ basement twice per hour and uses only 32 watts.

Needs only a 5” x 12” opening through the rim joist or outside wall. Comes with 6’ power cords and exhaust hood. Run it continuously or with a plug-in timer. Also helps reduce basement humidity.

One Fan: 110 CFM | .3" Max Static | 16 Watts | .3 Amps
Two Fans: 220 CFM | .3" Max Static | 32 Watts | .6 Amps
Three Air Flow Options
Easily reverse the direction of the airflow to:

    Exhaust Radon         Supply Fresh Air    Balance Air Exchange


RV2 Ventilator
For Ventilated Crawl Spaces

The RV2 Radon Ventilator exhausts radon and other harmful soil gases and allows fresh outdoor air to replace them. At 220 CFM, the RV2 ventilates a 20’ x 40’ x 3’ crawl space over 5 times per hour while using only 32 watts.

Simply mount the unit against a vent opening with the included hardware and plug it in. For even greater results multiple units can be installed. Run it continuously or with a plug-in timer. Also helps reduce crawl space humidity.

220 CFM | .3" Max Static | 32 Watts | .6 Amps



Dryer Booster

D-Strat Fans

Chimney Stack Assist Kit

Radon Vac Fan

Basement Fan
Rooftop Inducers
Room-to-Room Fans
Crawl Space Fans


Home  |  Contact Us  |  About Us  |  Document Library  |  Site Map  |  Articles

© 2020  Tjernlund Products, Inc.  

Phone: 800-255-4208  |  Fax: 651-426-9547