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Radon invisible radioactive USA second leading cause of lung cancer gas comes from the earth. Most American homes have negative basement lower floor pressure due to HVAC cold air return duct leakage, supply duct leakage in crawl spaces, house stack effects because lighter warn air rises, moist air rise effect because lighter moist air rises, exhaust fans, basement fan contraptions that suck air out of homes, dryer, fireplaces that suck air out of homes, appliances that have power exhaust vents, and attic access panels that are not sealed permitting thermal bypass or escape of conditioned indoor air. These conditions permit radon to be sucked out of the soil ground at cracks, holes, sumps, crawls, slabs, penetrations, and joints. You want a slightly positive lower level pressure minimizing the sucking of radon gas. Check, your lower levels with a pressure gauge, smoke, or even toilet paper to see if have negative pressure or depressurization. You may need to seal cold air returns or sump pumps, keep house fans off when not in use, seal all attic access panels, keep interior doors open, run a basement dehumidifier, condition crawl spaces, install chimney balloons in chimneys not being used, and finally, open the lower level HVAC supply registers to blow furnace air to slightly pressurize. If your basement blows, it cannot suck radon. You can test yourself or have your home and granite countertops tested by a home inspector. If you still have radon, you need to call a radon mitigation, reduction, or removal expert to test, evaluate, and repair or install a sub below slab depressurization system mitigation radon reduction system… Please visit my website http://
www.houseinvestigatyions.com” >www.houseinvestigatyions.com
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