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How Radon Repair Systems Stop Radon Gas From Entering The Home
Radon repair in a home is necessary in order to prevent radioactive radon gas particles from affecting the people living in the house. Radon repair is required for homes that measure concentrations in excess of 4 picocuries (pCi) per liter of air. Radon gas concentrations above this level start to increase the chance of developing lung cancer. Gas levels of 20 pCi per liter or air or higher increase the risk of cancer significantly. Several radon repair technologies are available to homeowners. Some are radon repair systems are designed to be used together while others are whole-house solutions. Radon repair systems can be installed in existing homes or integrated into new construction.
The most common way that radon gas enters a home is from the soil to the house due to differences in pressure. The relative pressure differential between the house and the soil outside causes the radon gas to be drawn up and into the home through any cracks or openings near the ground. Several factors can encourage this movement. These factors include wind, barometric pressure and even something known as the stack effect.
Some radon repair technologies attempt to address this movement of the gas by adjusting the pressure. Active depressurization radon repairs techniques use exhaust pipes driven into the ground. The pipes reduce the soil pressure and provide an outlet for the gas. The radon repair pipe can run up through the roof of the home or out to another part of the property. A fan draws any gas through the pipe so that it can be dispersed safely into the atmosphere. Radon repair through active depressurization can work for many types of homes. It is also effect when used with other radon repair strategies such as sealing a slab or crawlspace.
Radon can enter the home from sources other than the soil. Most radon repair techniques do not specifically address these other sources. Radon levels can increase in a home when the gas is carried in the water. Personal wells are especially vulnerable. The water spraying out of a showerhead or kitchen tap can release radon gas particles into the air. Another means of entry is through surface emissions. Radon particles can be emitted from certain materials in the house. Granite countertops are one example. Combustion of natural gas or coal can also release radon gas. Although these emissions are relatively low, they can increase levels in the home during initial testing for radon repair systems.
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Indoor radon repair relies mainly on the concept of dilution. Radon repair systems attempt to add fresh air to the house and remove air full of radon. This is commonly done through fans that circulate the air. These radon repair systems can address any accumulated radon in the house regardless of the source. Radon repair through internal ventilation and dilution will work for nearly any type of home regardless of construction. The main complication with radon repair through dilution is that the fans can affect the temperature of the house. Radon repair inside of the home is most effective when other radon repair techniques are used to lower the amount of gas entering the space.