Subslab Suction (Subslab Depressurization)

80-99%

$800-2500

$75-175

Works best if air can move easily in material under slab

Passive Subslab Suction

30-70%

$550-2250

There may be some energy penalties

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

Draintile Suction

90-99%

$800-1700

$75-175

Works best if draintiles form complete loop around house

Blockwall Suction

50-99%

$1500-3000

$150-300

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

Sump Hole Suction

90-99%

$800-2500

$100-225

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

Submembrane Depressurization in a crawl space

80-99%

$1000-2500

$70-175

Less heat loss than natural ventilation in cold winter climate

Natural Ventilation in a crawl space

0-50%

None $200-500 if additional vents installed

There may be some energy penalties

Costs variable

Sealing of Radon Entry Routes

0-50%

$100-2000

None

Normally used with other techniques; proper materials & installation required

House (Basement) Pressurization

50-99%

$500-1500

$150-500

Works best with tight basement isolated from outdoors & upper floors

Natural Ventilation

Variable

None $200-500 if additional vents installed

$100-700

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

Heat Recovery Ventilation

25-50% if used for full house 25-75% if used for basement

$1200-2500

$75-500 for continuous operation

Limited use: best in tight house; for full house, use with levels no higher than 8 pCi/L; no higher than 16 pCi/L for use in basement; less conditioned air loss than natural ventilation

Water Systems:

Aeration

95-99%

$3000-4500

$40-90

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

Granular Activated Carbon (GAC)

85-99%

$1000-2000

None

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