Radon System Test at Build Site

Introduction

• Speaker: Hameed Misawa from Fan Tack, an aerospace engineer
• Objective: Conduct a radon system test to ensure safety for the family living in the house
• Radon Concern: Proven link between radon exposure and lung cancer
  • Goal: Achieve zero radon levels in the house

Preparation

• Gravel under slab: Facilitates air movement for radon mitigation
• Challenges: Older homes with compacted dirt under the slab require more powerful systems or multiple suction points
• Monitoring: Homeowner will need to monitor radon levels continuously
  • Pressure gauge installed to check system performance

Radon Mitigation System

• Central Chase: Runs through the house from crawlspace to roof
• Access Point: Pipes for tests will connect to the drain tiles
• Crawlspace Setup:
  • 4-inch PVC pipe
  • Fan installed outside to prevent indoor leaks
  • Micro manometer used to monitor pressure at the slab's edge
  • Testing for leaks using smoke to ensure all leaks are found and sealed

Fan and Measurement

• Max CFM: 550 at free air, capable of 4.5 inches of static pressure
• Initial Tests: Inducing pressure and measuring air flow
  • Ideally, low flow (small CFM) indicates efficient system
• Equipment:
  • Digital manometer connected to inlet and outlet
  • EC speed controllable fan
  • Target pressure: 10 Pascal
  • Current reading: -2.5 Pascal
• Additional Testing: Ensuring correct placement of measurement hose

Results and Adjustments

• Measurement Setup: Ensured hose was in the system and reached a drain line
• Outcome: Achieved 11.5 Pascal, meeting initial goal
• Operational Assessment:
  • Current operation: 218 CFM and 1.43 static pressure
  • Improvement expected after sealing and adding dirt

Conclusion

• Successful test but with higher than desired air flow rate
• Plan to seal additional leakage pathways in the future
• Fan Efficiency: At full speed, uses 170 watts
• Future Monitoring: Continuous assessment necessary as the house construction finishes

Additional Information

• Fan Tech Radon Control kit available for precise system installation
• Encouragement for audience interaction: Comment, like, subscribe