How Far Above Gutter Radon Mitigation

The under slab portion is embedded in the under slab aggregate which forms a gas permeable material through which the radon gas passes easily.

How far above gutter radon mitigation.

Also a radon system is in effect mining radon out of the ground and very high levels can occur at the discharge point. In fact the radon gas concentration approaches background levels at 3 4 feet from the discharge point. Astm e 2121 is a us standard for reducing air born radon in homes as far as practicable below the action level of 4 picocuries per liter pci l 148 bq m 3. It is also well over 10 feet horizontal distance from any windows or vents to the sides or above including any soffit vents that may be present.

Some states recommend achieving 2 0 pci l or less. When radon gas is discharged via a radon mitigation system above the roof the radon concentration falls off dramatically with distance from the point of discharge. It should be safe to terminate the radon pipe 15 or 20 feet above the ground which exceeds the 10 foot minimum height standard. Depending on the area that needs the remediation the under slab portion of this pipe is usually perforated and with a t so it can extend at least 5 feet on either side.

Radon mitigation systems depressurize the subslab region and these systems will not work if there are significant air pathways that connect your subslab region either to the outdoor air or to the indoor air that s in your basement.