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Types of Systems

This chart is from the EPA Consumer's Guide To Radon Reduction.

It lists different types of radon reduction, effectiveness and cost range based on national averages. These averages reflect pricing from the time this table was produced (pre 2000).


Typical Radon Reduction

Typical Range of Installation Costs (Contractor)

Typical Operating Cost Range for Fan Electricity & Heated/Cooled Air Loss (Annual)


Subslab Suction (Subslab Depressurization)




Works best if air can move easily in material under slab

Passive Subslab Suction



There may be some energy penalties

May be more effective in cold climates; not as effective as active subslab suction

Draintile Suction




Works best if draintiles form complete loop around house

Blockwall Suction




Only in houses with hollow blockwalls; requires sealing of major openings

Sump Hole Suction




Works best if air moves easily to sump under slab; or if draintiles form complete loop

Submembrane Depressurization in a crawl space




Less heat loss than natural ventilation in cold winter climate

Natural Ventilation in a crawl space


None $200-500 if additional vents installed

There may be some energy penalties

Costs variable

Sealing of Radon Entry Routes

See comments



Normally only used with other techniques; proper materials & installation required

House (Basement) Pressurization




Works best with tight basement isolated from outdoors & upper floors

Natural Ventilation


None $200-500 if additional vents installed


Significant heated/cooled air loss; operating costs depend on utility rates & amount of ventilation

Heat Recovery Ventilation

Variable/See coments


$75-500 for continuous operation

Limited use; effectiveness limited by radon concentration and the amount of ventilation air available for dilution by the HRV. Best applied to limited-space areas like basements.

Water Systems:





More efficient than GAC; requires annual cleaning to maintain effectiveness & to prevent contamination; carefully vent system

Granular Activated Carbon (GAC)




Less efficient for higher levels than aeration; use for moderate levels (around 5000 pCi/L or less); radon byproducts can build on carbon may need radiation shield around tank & care in disposal

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