RMS Mitigation System Design & Installation 4

Question 1

A contractor discovers a home has an HRV (Heat Recovery Ventilator) already installed. How does this affect radon mitigation system design?

Accepted Answer

SSD is still the preferred method; HRV may reduce levels but is not a standalone mitigation strategy

Answer

While an HRV can dilute radon by increasing ventilation, SSD remains the most effective and preferred mitigation method; the HRV should not be considered a substitute.

Question 2

What is the function of the electrical junction box typically installed with a radon mitigation fan?

Accepted Answer

To provide a dedicated power source for the fan with proper weatherproofing and code compliance

Answer

The junction box provides a code-compliant, weatherproof electrical connection dedicated to powering the radon mitigation fan.

Question 3

During system installation, a contractor notices the home has a forced-air HVAC system with ducts running through the basement. Why is this significant?

Accepted Answer

Duct leakage can depressurize the basement and increase radon entry

Answer

Leaky return ducts in the basement can depressurize the living space relative to the soil, increasing the driving force for radon entry.

Question 4

When sealing a floor drain as part of a radon mitigation installation, which method is most appropriate for a floor drain that is still needed for drainage?

Accepted Answer

Install a trap primer or floor drain trap seal insert that allows drainage but blocks radon

Answer

A trap seal insert or trap primer maintains the water seal that blocks radon entry while preserving drainage function.

Question 5

What is the recommended minimum distance between a radon exhaust pipe termination and a window, door, or other opening into the building?

Accepted Answer

24 inches

Answer

EPA and most state guidelines require the exhaust termination to be at least 10 feet from any window, door, or opening to prevent re-entry of exhausted radon.

(RMS) Radon Mitigation Specialist Practice Test

(RMS) Radon Mitigation Specialist Practice Test

RMS Mitigation System Design & Installation 4