Posted by kevvyg on Tuesday, March 24, 2015
Last week, we took a little time off from posting. As you may have noticed, Miele is completely renaming their entire line of HEPA vacuum cleaners, and it's been created a lot of new work for us. But it's Tuesday, and we're back. I wanted to start with a roundup of some of the recent stories touching on the world of asthma, allergies, and environmental control.

Reaching back the furthest is the announcement earlier this month that there was a proposed class action lawsuit filed against Lumber Liquidators. While traditional home improvement is necessarily something you'll see us writing about, this story was of particular note. Potential Problems with Cheap Laminate FlooringFor many with severe allergies or asthma, a recommendation your allergist or physician will often recommend is to replace your carpet with smooth flooring. This can be anything from linoleum or hardwoods, to tile or laminate. None of these will trap and retain allergens and irritants like carpet does. This story broke on 60 Minutes, and focused on laminate flooring and levels of formaldehyde in the product. As we've often mentioned, formaldehyde is common but powerful volatile organic compound (VOC) linked to a wide variety of conditions. Formaldehyde found in glues, adhesives, new furniture, and carpet can often aggravate respiratory conditions like allergies or asthma and severely impact those with chemical sensitivities. More generally, formaldehyde is a known carcinogen, and the result of long term exposure to any carcinogen is almost always the same - cancer.

Court Battles Ahead for Lumber LiquidatorsAt this point, there is plenty to be said on both sides. Some within the flooring industry attack the test or testing methods, which is performed by the California Air Resource Board (CARB), the same folks who test home air purifiers to ensure they do not produce ozone. Others have lambasted the company, Lumber Liquidators, as well as the manufacturers in China. While blame and claims fly, and a court battle is likely to drag on for years, there are a couple things to take from this story.

First, while all laminate does contain some level of this VOC, most have minimal levels that are within limits set by the CARB. CARB has some of the most rigorous testing in the world, with regard to emissions, ozone, and other potential indoor pollutants, and while some VOCs Are Common But Constant or Strong Exposure Can Create a Whole Host of Health Problemsmay take issue with how this particular test is performed, it's worth noting that the same testing of products sold by other home improvement stores revealed no issues with elevated levels of formaldehyde. Think of this like paint. Most interior paints contain some level of VOCs, but there are some that have lower levels than others.

Second, remember the source. While products of all types, made in a variety of countries, can and do have problems (think of the string of auto recalls in the last several years), in this instance it was only laminate made in China that so dismally failed CARB tests.

I'm not saying every product that comes out of China is bad or dangerous, but by this point, we should have had enough reason to be somewhat leery (drywall in 2001, toxic pet treats in 2007, melamine in milk in 2008, heavy metals found in toys' paint in 2011). Do a little extra research. The internet has a wealth of information, and in a short amount of time you can often double check a company's claim about its product. I'd also advise you to consider the source of your information. "Jimbo's Awesome Blog" might not necessarily be as credible as a piece found on a major news site or National Institute of Health page.

The second story I wanted to mention was likely missed by many, but it involves the drug Breo® Ellipta® by GlaxoKlineSmith. Commonly used to treat those with COPD, there has been scrutiny on the drug over its potential use by adolescents and children or for any condition other than COPD (which is comprised of emphysema and chronic bronchitis). Breo® Ellipta® - Adults with COPD OnlyAn FDA advisory panel overwhelmingly voted against the use of Breo® Ellipta® in children 12-17. For now, the drug will remain a COPD drug and NOT an asthma medication.

This isn't the first time an issue like this has arisen. Breo® is a two part drug which contains a corticosteroid as well as a long-acting beta-agonist (LABA). LABAs have and continue to be scrutinized for their links to increased risk of death in those who have asthma and use this class of medication. A quick glance at the official Breo® website should give you a pretty clear indicator of this as the warning that this drug is NOT to be used for asthma appears repeatedly on their site.

Air Pollution Continues to Plague to City of LightsLastly, today was not the day to be a Parisian resident with an even numbered license plate, particularly a joyride was on the daily to-do list. As has happened in Paris before, extremely high levels of air pollution has made the city the smoggiest on the planet, if only briefly dethroning Beijing and/or New Delhi. While a view of the skyline may appear rather miserable today, it likely won't last long.

As a final note, April is almost here, and in addition to the dogwoods being in full bloom this weekend, our most dreaded spring allergens are beginning to emerge from their winter slumber. Nicer weather shepherding in weeks of sneezing, congestion, and sinus pressure. Thanks nature!

To see the entire 60 Minutes piece about flooring.

Author: KevvyG

Posted by kevvyg on Wednesday, December 17, 2014
Yes, I know what you're thinking. How could an air purifier be anything like a night club? When you think about some of the different layers of filtration, you have some of the usual suspects that you may find at any trendy club.

The Heavy Lifting - A HEPA Filter Prevents The Majority of Particles From Passing Through Let's start at the door. The first person you often see if someone checking IDs. This person also turns away people who aren't dressed appropriately or anyone who seems like they might cause problems once inside. This character is a lot like your HEPA filter. Pollen, dander, dust, and other D-list celebrities (Note to Bruce Campbell - You're in!) aren't allowed to pass, and for people with allergies or asthma, they represent potential troublemakers. The HEPA filter refuses to allow 99.97% of all particles 0.3 microns or larger to pass.

A certain group of troublemakers get by the HEPA filter. They dress the part and for them, the HEPA filter makes an exception. This group includes things like smoke, fragrance, chemical vapors, and exhaust emissions. Fortunate for you though, you have a friend on the inside - activated carbon.

The Friendly Filter - Activated Carbon Is Attracted to and Binds with VOCs, Smoke, and Odor MoleculesActivated carbon is the equivalent of a social butterfly. He's hip. He's cool, and he REALLY enjoys giving out free hugs. While smoke, chemical vapors and others may get by the HEPA filter, activated carbon seeks these characters out, and once he finds them, it's time for a hug! Like long lost pals, molecules bind with activated carbon in a warm, permanent embrace. Because of the molecular composition of activated carbon, substances are naturally attracted to him, but there are still some things that can slip by the embrace of even activated carbon. This is where a blended carbon filter comes in.

Friends of activated carbon can vary, but all help him do his job better. Some friends, like zeolite will attract and soak up chemicals. The Enforcer - Substances Like Potassium Iodide Oxidize VOCs, Breaking Them Down Into Smaller, Inert CompoundsOthers play a slightly different role. Substances like potassium permangante, potassium iodide, magnesium dioxide, or copper oxide act in one of two ways. They either seek out some of the bad apples that slip by activated carbon and bind to them, or they play the role of the "mean girl". Particularly harmful compounds like dioxins and hydrocarbon pollution are literally broken apart into smaller, inert components via the process of oxidation. So in this way, they broaden carbons ability to remove reaction causing compounds.

So, yes, your air purifier is actually like a night club, and some of the best filter out a wide range of bad apples and prevent them from causing you problems. Knowing what triggers your reactions and matching it to the right filter media is the winning combination when it comes to controlling asthma, allergies, and chemical sensitivities.Want to see our top pick for best air purifiers for allergies and asthma or our top MCS and VOC air purifiers? Or click here to see a picture of my dog in a Santa hat (he is NOT amused).

Author: K. Gilmore

Posted by kevvyg on Thursday, December 11, 2014
Since we first introduced them this spring, the AirPura line of HEPA air purifiers has been steadily climbing in popularity. With the largest coverage area of any residential air purifier, the quietest operation, and a simplistic yet highly effective design, it's no wonder why these models have been garnering the attention of anyone wanting to improve their indoor air quality. There has been a good deal of interest in some of the other models that AirPura makes, and in response to this, we're expanding our offering! As the first expanded model, we're taking the C600, which is great for The New AirPura C600DLX VOC Air Purifierremoval of things like smoke from fires and tobacco as well as odors and fragrances, and now offering the C600DLX air purifier.

What's the difference between the C600 and C600DLX? In reality, they are much more alike than different. Both have the staple features of an AirPura, including quiet operation, the largest coverage area, superior airflow, separate filters, simple operation, steel construction, and a sealed system. Throughout both machines, there is very little plastic or adhesive, and the gaskets are felt instead of rubber or foam. These things reduce the potential for off-gassing, which is particularly important for people with chemical sensitivities.

The AirPura C600DLX air purifier targets the VOCs from common sources like these.The primary difference between these two models is in the carbon filter. While both use 26 lbs. of granular, activated carbon, created from a coconut shell base, the C600DLX employs a blend of carbon. Very similar to the VOCARB blend that you'll find in a competing brand, the AirPura C600DLX carbon blend is designed to capture a broader range of chemical vapors, making it uniquely suited for a VOC filtration. So while the standard C600 is great for most residential applications, for situations dealing with heavy concentrations of VOC from industrial pollution, exhaust emissions, or large areas of newly painted walls or newly finished floors, the C600DLX is an excellent alternative. Perhaps the best part about these two models - the filters are interchangeable. If you have a C600 and want better VOC filtration, simply purchase the C600DLX replacement filter when your current filter is all used up, and you've turned your C600 into the C600DLX.

The C600DLX is the first in a few models that you can expect to see added to the line in the coming week. For more information on the C600DLX air purifier or to see all AirPura models.

Author: KevvyG

Posted by KevvyG on Tuesday, September 10, 2013
Last week we saw a flurry of articles written about the release of a study in the British Journal of Dermatology. The reason for publicity is that part of the research takes aim at an activity that pregnant women commonly engage in and its potential link to the development of asthma in the unborn child. I'm not talking about cravings, though that IS always a fun and revealing topic to delve into. At this point, my title gives it all away - swimming. So before we figuratively (and literally) jump overboard, let's take a look at this theory.

First, this was a difficult article to find. Despite so many news articles written about it, there was literally only one article that actually cited the original abstract. Typical of research pieces, the title was not something that made the association between it and the content evident to a layperson. Posted below, the research piece starts by mentioning the "hygiene theory". This is the theory that the rise in allergic disease in western societies is at least in part due to children not being exposed to a variety of microorganisms during key developmental periods. More simply put, the theory suggests that we're too clean. The proliferation of antibacterial soaps and hand sanitizers, the focus on everything in the home and office being clean, the Pregnancy, the Hygiene Hypothesis and Swimmingprolific use of antibiotics, and the reduction in the amount of time that children spend outdoors, exposed to germs and allergens, creates an environment where a developing immune system isn't properly trained. Subsequently, the immune system falsely recognizes allergens, microbes and other environmental elements as "bad actors" and when exposed to them, triggers an immune response to promptly boot them off stage.

This is only a theory and some of the most recent research has punched some holes into it. The current piece though expands on the hygiene theory and suggests that exposure to certain chemicals may play a role in the development of allergic disease. In this particular instance, researchers are focused on airborne chemicals. They have found that five specific maternal occupations are characterized by "high or persistent exposure to airborne chemicals." Additionally, they suggest that sustained exposure to chlorinated chemicals from swimming pools may also be related to the development of allergic disease.

VOCs, including chlorinated compounds like chloramines, have long been studied and show links to a variety of health problems. This study though, has caused a stir because of the mention of chlorine and swimming. Swimming is an often recommended activity for mothers to be since it is a great way to maintain a healthy weight, and unlike many other forms of aerobic exercise, swimming allows for better overall support of the body. The British National Health Service recommends swimming for pregnant women, and the U.S. National Institute of Health has sponsored studies that show swimming has no "adverse reproductive outcomes". Swimming in Lake MichiganHowever, the study we're currently focused on is one that looks less at swimming as an activity and more at the exposure to chemicals.

In not only the occupations highlighted but also swimming in chlorinated pools, researchers have suggested there is a association between VOCs and chlorine vapor and the development of atopic disease like asthma. So with that being said, are there alternatives to chlorinated swimming pools? While you can certainly wear a asthma mask to reduce exposure to pollutants (like the Honeycomb Carbon mask I recently picked up for a friend who is pregnant with her first child), a mask isn't really an ideal device to swim with.

A coworker of mine suggested saline or "salt water" pools. Personally, I've never swum or even heard of such a thing, but after some research as well as a call to a local apartment complex that has a saline pool and another to a retailer of such pools, I found one thing that appears to be true. Saline pools aren't as free of chlorine vapor as you might think. While they do use less chlorine, they still do use chlorine to sanitize the pools. They rely upon an advanced filtration system that uses the salt in the water to produce chlorine. And like traditional swimming pools, they do require a good deal of maintenance to ensure proper pH balance and chlorine levels are maintained to keep the water sanitary.

So what about the ocean, nature's original "salt water pool"? Love it. The ocean is great! Unfortunately, not all pregnant women have easy access to the ocean, not to mention some times of the year are simply too cold to go for a super brisk swim (all while pregnant nonetheless). Lakes and rivers might also be excellent alternatives, but Best Place to Swim?  Yup!again, access to these bodies of water may be limiting, as could be the weather. Still, in coastal areas or in places where weather permits, all three of these would be good alternatives to chlorinated swimming pools.

This study isn't definitive, and like other theories, a great deal of further research is needed to more clearly define the association, its consequences and suitable alternatives. I'm not suggesting you completely jump ship and avoid chlorinated swimming pools (bad pun #2). I generally do simply because I grew up swimming in lakes, rivers and "cricks" (what, up home, we define as bigger than a stream but smaller than a creek). Chlorinated pools are ubiquitous, particularly here in the U.S., and access to them is often free and convenient, but if this potential does give you cause for concern, consult with your obstetrician to find suitable exercise alternatives, or at a minimum, cut back on the frequency of swimming in them while pregnant.

Perhaps this all gives new meaning to one of my grandmother's favorite sayings, "Why don't you go jump in a lake?!" Thanks Grandma!

The original abstract of this research piece.

Author: K. Gilmore

Posted by kevvyg on Monday, February 25, 2013
While I generally shun most of same things men in my family have long considered habits of the opposite sex, there is one thing in particular where I break that mold. I have two furry caterpillars that are constantly on a slow march towards each other - my eyebrows. No amount of pulling seems to deter them, and while I admire her work, there can and should only be one person that people think of when they hear "unibrow" - Frida Kahlo. So one of this weekends tasks was to find a place to have them waxed into submission. Going from the suggestion of my roommate, I went to a nail salon just a short drive from the house.

I don't have much experience to work from, but the salon seemed trendy, clean, a lot of white and modern furniture. Another thing that did not escape my attention was the smell. The minute I opened the door it was like being slapped in the face with a bottle of nail polish. After talking to front desk, I sat down in an overstuffed chair, and noted that I was the only male there. (I suppose that was to be expected though.)

As the minutes ticked by, I looked over the large room. It had high ceilings, similar to what you would see in renovated industrial spaces. While I did spot one employee wearing a surgical mask, I couldn't help but wonder why. They offer absolutely no protection against the fumes and at best really only block escaping saliva as she spoke. Aside from that single mask, there was nothing that I could see, that was filtering the air in their. And with no open windows or doors, I could see how even this large space could hold such an overpowering smell.

Nail Salons and Toxic VaporsNail polish has a long history of being laden with toxic chemicals, and even though laws limit or ban the amounts of things like toulene, DBP and formaldehyde (toxic trio of nail polish) that can be found in polish, many products labeled a "toulene-free" or "three-free" still contain these substances. These types of chemicals can have far reaching health consequences, as some are carcinogens and others are linked to everything from respiratory and skin irritation to developmental and reproductive problems .

I am guessing that this type of thick, heavy polish odor is fairly common since the other patrons and employees seemed completely unfazed. Since I was already feeling out of place, the overpowering smell did little to make me want to continue to wait. After another ten minutes passed, and I was still quietly waiting, I had decided my fuzzy caterpillars were going to live to see another day. I said goodbye to the folks at the front desk and "hello" to my tweezers.

Author: K. Gilmore

Posted by kevvyg on Thursday, May 24, 2012
With Technical Bulletin 117 in 1975, California became the first state to pass legislation that required flame retardants to be a part of the sofas. From there, the law spread to encompass nearly all home furnishings that included foam, like mattresses, love seats, chair, and even tents. The provision outlines that home furnishing and items such as these must be able to withstand an open flame for 12 seconds. As the years have passed and research has shed light on the chemical flame retardants used and their impact on health, what once seemed like a universal positive now casts a different shadow.

Multiple times bills have been drafted in the California legislature - each seeking to repeal the 1975 provision. Each time the bill has failed, arguably due to heavy lobbying efforts by the chemical industry. But why has California changed course? Why is there now a push to remove the flame retardants that were once thought to protect against house fires? To answer these questions, we need to look back at the original law, why it came about and what research since that time has shown us.

Consumer safety is at the heart of fire retardant use mandate. Testimony of accounts where home furnishings were accidentally set ablaze was one original driving factor. Yet contrary to this push, the law requires that for most products, only the foam must be fire retardant. So for many home furnishings, the exterior fabric, the logical point where a fire could possibly start often requires no special coatings or treatments, and items like mattresses, require a prescription from a doctor before a mattress without flame retardants can be sold or constructed. And to play devil’s advocate, how many times have you seen a house fire where the mattress or couch was all that remained?

Research into the health effects of the chemical flame retardants used has shown that exposure to many of the chemicals used have serious health consequences, including birth defects and increased rates of cancer. Chlorinated flame retardants are common, and substances that were originally grandfathered in, like many brominated fire retardants, have since been scrapped but testing of replacement chemicals and their long term health effects is slow in coming.

Statistics show that there has been a reduction in the number of fires that have started in homes, but physicians groups and others point to an overall decrease in smoking, the use of fire-safe cigarettes (FSC) and increased use of sprinklers and smoke detectors as the cause - not chemical flame retardants. To this point, one could still argue, as many politicians and lobbyists do, that the research behind the decrease the number of fires isn’t conclusive on this point.

For those who suffer from MCS or sick-building syndrome, the nearly 2 pounds of chemical flame retardants that can be found in modern home furnishings can be a continual source of aggravation and recurring reactions. As the public becomes more aware of what is in the products we have in our home, you see a push by many industries to lower the chemical content - take VOC's in paint as a recent example.

The latest iteration of the bill to provide choice when it comes to home furnishings with flame retardants has the support of doctors, firefighters and consumer safety advocates. Because California represents the fifth largest economy in the world, a change in the California law would likely cause a change in production of home furnishings across the Canada and the US. As of now, there is no choice, but should a repeal or amendment pass, which would you choose?


Tags: MCS, VOC's
Posted by Shifrah on Monday, October 17, 2011
Chemical exposure is all around us. Whether we are inhaling fumes from furniture or shower curtains, or ingesting food with preservatives or BPA content, toxic chemicals enter our bodies in various ways – and not without effect. Tests have found chemicals known to be carcinogenic or hormone-disruptive in our bodies and the repercussions are only just beginning to be understood.

Personal care products like shampoos, lotions, soaps, facial cleansers, and even toothpaste and nail polish are one significant source of possible chemical exposure. Without much regulation as to what can be included in these products, chemical exposure adds up quickly when you consider how many of these products are sprayed or slathered on daily.

The safest thing seems to be to minimize our exposure where possible by making less toxic choices. Personal care products are an excellent place to start since the chemicals in these items are either inhaled or absorbed into our skin every day. For those who suffer from allergies or multiple chemical sensitivity, making natural choices is even more of a necessity; choosing products with no preservatives, such as parabens, or fragrances often makes the difference between an unpleasant allergic reaction and none.

Self-education about which ingredients to look for and diligent label-reading (which we encourage) is important, but is there an easier way to choose personal care products that don't introduce a medley of toxic chemicals into our bodies?

The Environmental Working Group provides a valuable resource for exactly this. Their Skin Deep Cosmetics Database is a guide of more than 69,000 products rated according to toxicity levels. Users can search by product type, by specific product, by brand, by ingredients, and more. Results give an overall score as well as a breakdown of chemical components and their dangers.

For more on personal care products, chemical exposure, and natural alternatives, check out the following:

Olive Oil for Allergies: Face Wash and Eczema Treatment?
Check Your Labels for Common Chemical Irritatants
Free and Clear Shampoo and Conditioner Customer Reviews

Posted by Shifrah on Friday, August 05, 2011
Indoor air quality affects everyone's health, but the repercussions of poor indoor air quality can be especially pronounced in individuals with asthma and allergies. While we may think of our homes as a haven from outdoor pollution like that from car exhaust and the like, the Environmental Protection Agency (EPA) reports that indoor air can be up to ten times more polluted than outdoor air, particularly when it comes to volatile organic compounds (VOCs).

According to the EPA, "VOCs are emitted as gases from certain solids or liquids. VOCs include a variety of chemicals, some of which may have short- and long-term adverse health effects."

Sources of VOCs in the home are numerous and varied, including varnishes, paints, cosmetics like nail polish, cleaning supplies, furnishings, permanent markers, adhesives, building materials, and printers, to name a few. Many VOCs that pollute indoor air are also brought into the home from outside sources. These include pesticides tracked in on shoes and dry cleaning chemicals brought into the home when clothing, linens, or drapery is dry cleaned.

In a growing body of instances, the EPA has been stepping into regulate some of these chemicals that can affect indoor air quality. Most recently, the EPA has issued restrictions on a popular dry cleaning chemical, perchloroethylene, commonly known as perc. According to the Wall Street Journal in The New Dirt on Dry Cleaners, "Many dry cleaners will be required to find new solvents to replace a widely used cleaning agent called perchloroethylene, or perc, by 2020."

The chemical has been used in dry cleaning since the 1930s, and over 80 percent of dry cleaning establishments rely on it. But the EPA has classified perc as a "toxic air pollutant and potential human carcinogen."

On its own Chemical Fact Sheet on perc, the EPA describes the possible effects of human exposure to perc:

"Breathing PERC for short periods of time can adversely affect the
human nervous system. Effects range from dizziness, fatigue, headaches and
sweating to incoordination and unconsciousness. Contact with PERC liquid
or vapor irritates the skin, the eyes, the nose, and the throat. These
effects are not likely to occur at levels of PERC that are normally found
in the environment.

"Breathing perchloroethylene over longer periods of time can cause
liver and kidney damage in humans. Workers exposed repeatedly to large
amounts of PERC in air can also experience memory loss and confusion.
Laboratory studies show that PERC causes kidney and liver damage and cancer
in animals exposed repeatedly by inhalation and by mouth. Repeat exposure
to large amounts of PERC in air may likewise cause cancer in humans."

Tune in Monday to learn about what allergy and asthma sufferers can do to limit their exposure to toxic dry cleaning chemicals.

For more on indoor air pollution, VOCs, allergies, and asthma, see:
Indoor Air Pollution and Air Quality
Indoor Air Quality Facts
VOCs and Indoor Air Quality
Multiple Chemical Sensitivity and Indoor Air Quality

Image courtesy of wikiversity.

Posted by Shifrah on Friday, July 22, 2011
Formaldehyde, only recently officially declared as a carcinogen, has long been considered a health risk. Formaldehyde can trigger asthma and exacerbate symptoms of chemical sensitivity, including itchy eyes, sore throats, nosebleeds, and more. Even if symptoms are not apparent, formaldehyde can still lead to long-term effects, including cancers.

A pervasive chemical, formaldehyde exposure can occur through many daily life scenarios. For instance, the chemical is used in particle board products and plywood, which is used in many furniture items; in cosmetics such as nail polish; in dry cleaning chemicals; and in mattresses and other bedding products, to name a few.

Allergic and asthmatic individuals, as well as those with multiple chemical sensitivity should definitely avoid exposure to formaldehyde-containing products as much as possible. Even individuals without reactions to the chemical should seriously consider minimizing exposure.

While formaldehyde exposure occurs seemingly anywhere and everywhere, certain professions carry with them a particular formaldehyde-exposure risk. Hair stylists and embalmers can be particularly affected by the chemical.

A case in point: "The federal Occupational Safety and Health Administration warned in April that a hair-care product, Brazilian Blowout Acai Professional Smoothing Solution, contained unacceptable levels of formaldehyde, and salon workers have reported headaches, nosebleeds, burning eyes, vomiting and asthma attacks after using the product and other hair-straighteners," according to the NY Times.

Furthermore, "Studies of workers like embalmers exposed to high levels of formaldehyde have found increased incidences of myeloid leukemia and rare cancers of the nasal passages and upper mouth."

However Despite Risk, Embalmers Still Embrace Preservative discusses how many funeral workers persist in using formaldehyde as the embalming fluid of choice, pointing out that other choices simply don't work as well.

While measures to protect workers from exposure have improved over time, including updated ventilation and wearing protective gear, time will tell if these safety precautions are enough to forestall the increased cancer risk these formaldehyde-handling service workers face.

Read more about formaldehyde and formaldyde-free products below:
Organic Bedding
Vanicream Skin Lotion
12 Most Dangerous Household Chemicals
VOC and Indoor Air Indoor Quality

Posted by Shifrah on Monday, April 25, 2011
I had the opportunity to speak with a builder last week. All of the houses he builds are certified green and Energy Star rated. This means that the materials he uses are low toxicity, such as low VOC paint and carpet adhesives, for example. In addition, his houses are tested by a third party to ensure that it is tightly sealed; air leakages drive up heating and cooling costs.

Sounds perfect, right? It is pretty great, but he did bring up a matter that I thought was interesting, and in line with much of what we've covered regarding indoor air pollution: A tightly sealed house, while it's great for keeping heating and cooling inside (and outside weather out), also means that any pollutants that are present indoors are there in higher concentrations, with little chance of fresh air circulation.

Hence, any toxins that are in the home may have a greater effect on inhabitants' health. For instance, radon that could be present, whether from the soil or from granite counter tops, could have a somewhat exaggerated effect as compared to the effect it would have in a not-so-tightly-sealed home. In addition, any pollutants that are introduced in the home environment from products like hairsprays, room fresheners, perfumes, art supplies, adhesives, chemical cleaners, etc. could easily build up in the home.

This, of course, is not to say that homes should not be tightly sealed. Rather, it's important to be aware that the products you use on a day-to-day basis could be greatly affecting your family's indoor air quality. Especially with Energy Star homes or homes that are properly insulated, it's important to consider using natural cleaning products and natural personal products.

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