Answer to Question #253714 in Mechanical Engineering for angel

Question

If the volume of the room is 15 m3, what ventilation rate in ACH must be maintained to keep radon levels below the US EPA recommended limit of 4 pCi/liter? What is the primary sink for radon in the cellar?

Answer 1

Assuming an initial radon level of 10pCi/l, the recommended ventilation rate should be 20cfm (cubic feet per minute) which is equivalent to 0.00944m³/s

For a room of 15m³, the ventilation rate of the room must be above 0.142m³/s.

Active subslab suction — also called subslab depressurization — is the most common and usually the most reliable radon reduction method. One or more suction pipes are inserted through the floor slab into the crushed rock or soil underneath. They also may be inserted below the concrete slab from outside the home$.$