Technique

Typical Radon Reduction

Typical Range of Insulation Costs(Contractor)

Typical OperatingCost Range for FanElectricity & Heated/Cooled Air Loss(Annual)

Comments

Subslab Suction(Subslab Depressurization)

80-99%

$800-$2,500

$50 - $200

Works best if air can move easily in material under slab.

Passive Subslab Suction

30-70%

$550-$2,250

There may be some energy penalties

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

Drain tile Suction

90-99%

$50 - $200

Works best if drain tiles form complete loop around house.

Block wall Suction

50-99%

$1,500-$3,000

$100 - $400

Only in houses with hollow block walls; requires sealing of major openings.

Sump Hole Suction

90-99%

$800-$2,500

$50 - $250

Works best if air moves easily to sump under slab; or if drain tiles form complete loop.

Sub membrane Depressurization in a crawl space

80-99%

$1,000-$2,500

$50 - $250

Less heat loss than natural ventilation in cold winter climates.

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-$2,000

None

Normally used with other techniques; proper materials & installation required

House (Basement) Pressurization

50-99%

$500-$1,500

$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

$1,200-$2,500

$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%

$3,000-$4,500

$50 - $150

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

Water Systems: Activated Carbon (GAC)

85-99%

$1,000-$2,000

None

Less efficient for higher levels than aeration; use for moderate levels (around 5,000 pCi/L or less); radon by-products can build on carbon may need radiation shield around tank & care in disposal.

* Note: The fan electricity and house heating/cooling loss range is based on certain assumptions regarding climate, your house size and the cost of electricity and fuel. Your costs may vary.