What is a good radon manometer reading?

Author: Karelle Cronin II  |  Last update: Saturday, November 20, 2021

Your radon mitigation's manometer readout should be between 0.5in-1.75in on the Manometer (U shaped- looks like a thermometer). This is NOT the level of Radon in your home. It is simply the amount of vacuum your mitigation system is generating.

What are bad radon readings?

What is Considered a High Radon Level? The U.S. Environmental Protection Agency (EPA) has determined that measurements of 4 pCi/L (picocuries per liter) or higher are considered dangerous levels. This radon level is largely unsafe and is 10 times higher² than the average outdoor air levels.

What are acceptable radon levels?

EPA recommends homes be fixed if the radon level is 4 pCi/L (picocurries per liter) or more. Because there is no known safe level of exposure to radon, EPA also recommends that Americans consider fixing their home for radon levels between 2 pCi/L and 4 pCi/L.

What are high radon readings?

Radon levels are measured in picocuries per liter, or pCi/L. Levels of 4 pCi/L or higher are considered hazardous. Radon levels less than 4 pCi/L still pose a risk and in many cases can be reduced, although it is difficult to reduce levels below 2 pCi/L.

What does a radon manometer measure?

Check Your Manometer

It's a visual gauge that tells you if your radon fan is running and at what static pressure. All active radon mitigation systems (this just means your radon system has a fan) are required to have a manometer installed so you can see if the radon fan is working.

Installing And Understanding Radon Mitigation System Manometer

What are normal radon levels in a house?

The average indoor radon level is estimated to be about 1.3 pCi/L, and about 0.4 pCi/L of radon is normally found in the outside air. The U.S. Congress has set a long-term goal that indoor radon levels be no more than outdoor levels.

What does radon Zone 1 mean?

What do the colors mean? Zone 1 (red zones) Highest potential; average indoor radon levels may be. greater than 4 pCi/L (picocuries per liter)

What is a safe level of radon UK?

There is no known “safe” level of radon, but the lower the concentration you are exposed to, the lower the risk to your health. Current advice from Public Health England is that “for levels below 100 Bq/m3, your individual risk remains relatively low and not a cause for concern.

What is radon action level?

What is the Action Level? ... This Action Level refers to the annual average concentration in a home, so radon measurements are carried out with two detectors (in a bedroom and living room) over three months, to average out short-term fluctuations.

What is a low radon level?

A generally accepted action level established by the World Health Organization, the WHO, is 100 Bq/m3, or 2.7 pCi/L. Homes or structures measuring higher are advised to take remedial action to lower radon levels. The WHO further advises an upper limit that should not be exceeded at 300 Bq/m3, or 8 pCi/L.

Is a radon level of 2.7 safe?

A "safe" level of radon listed by the WHO is anything under 2.7 pCi/L while the EPA lists anything under 4.0 pCi/L. At these levels or higher, a mitigation system is strongly suggested.

What is a bad radon number?

No level of radon is safe. The United States EPA has established the radon level of 4.0 picocuries per liter to be the action level for radon gas in homes. Meaning, take action to reduce radon levels that are greater than four picocuries per liter. But consider taking action if radon levels are between 2-4.

Is 2.1 radon level bad?

The U.S Environmental Protection Agency (EPA) recommends taking action to reduce radon levels indoors if concentrations exceed 4 picocuries per liter of air (pCi/L) and urges people to consider fixing their homes if the levels range between 2 and 4 pCi/L.

Is a 48 hour radon test accurate?

Findings show radon tests of less than 90 days are imprecise up to 99 percent of the time. Summary: A new study finds the only reliable way to measure exposure to radon gas is with a long-term testing kit, 90 or more days. ... "Radon gas levels can fluctuate wildly day to day," says Dr.

What is Zone 2 for radon gas potential?

Zone 2 is colored orange for moderate potential, with average radon levels between 2 and 4 picocuries per liter. Zone 3, with the lowest risk of exposure, is yellow and has less than 2 picocuries per liter.

What's the highest radon level?

According to the EPA, the maximum “acceptable” level of radon is 4.0 pCi/L, but even that level is not “safe”, per se. The EPA strongly recommends you consider radon mitigation between levels 2.0 and 4.0. For perspective, the average outdoor air level of radon is 0.4 pCi/L.

What does radon level 3 mean?

Little Risk – Zone 3: Counties with predicted average indoor radon screening levels less than 2 pCi/L.

Is it OK to live in a house with radon?

The EPA states, “Radon is a health hazard with a simple solution.” Once radon reduction measures are in place, home buyers need not worry about the quality of the air in the home. ... Since removing radon is relatively simple, your family will be safe in a home with a radon reduction system in place.

What time of year is radon highest?

The reason that radon levels in the home can be higher in the summer and winter is two-fold. During the winter, the air in your home tends to be much warmer than the outside air, and this temperature difference creates a vacuum within your home.

Does opening windows reduce radon?

Opening windows improves air circulation and ventilation, helping move radon out of the house and mixing radon-free outside air with indoor air. Make sure all your basement windows are open. ... Opening basement windows helps reduce negative air pressure, diluting radon with clean outdoor air.

How many suctions are needed for radon mitigation?

Why would a home require two suction points in the basement floor instead of one? It all has to do with the aggregate under the cement slab. A radon mitigation system will collect the radon efficiently when there is 4” to 6” of at least pea size gravel under the basement slab.

How do I know if my radon mitigation system is working?

You can use the u-tube manometer to determine if your system is working. Look at the liquid in the tube. If it is equal on both sides, it is an indication that there is no pressure in the pipe. This means no suction from the fan (far left image) and the radon mitigation system is not working.

What are symptoms of radon exposure?

Possible symptoms include shortness of breath (difficulty breathing), a new or worsening cough, pain or tightness in the chest, hoarseness, or trouble swallowing. If you smoke and you know you've been exposed to high levels of radon, it's very important to quit smoking.

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