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Quartzite radiation test

Radiation Exposure How Much Is “Too Much” Alex Stadtner, president of Healthy Building Science, wrote a blog in April 2012 entitled “Radioactive Granite and Quartzite – Risks from Radon” about discovering high levels of radiation in Quartzite and Granite used in residential building for items such as countertops, flooring, and bath and shower enclosures.  While

Smog and Particulates

Tuesday, 01 October 2013 by
Particles_Blue Oxygen

Smog and Particulates How Fine Particulates Affect Exterior and Interior Air Quality No matter how well our “Green and Healthy” homes are designed and built, our interior air quality can only be as good as our exterior air quality (our “source air”), unless we add active air filtration into our building design.  But how do

Dirty Electricity from LEDs

EMI and LEDs –  Not all LEDs are the same! Electromagnetic Interference (EMI, aka: “Dirty Electricity,” or “High Voltage Transients”) is a term coined for quick transient pulses, harmonics, spikes and dips in the electrical power in a home’s wiring that deviates from a purely 60Hz sine wave.  These often occur due to computers, other

How to Clean Up Mold?

Tuesday, 10 September 2013 by
Mold Clean Up - When to Call in Professional Remediators

Most of this blog on how to clean up mold is from the “Help Yourself to a Healthy Home” guide from HUD. We generally suggest hiring an established remediation company with professionals certified by the IICRC… but many cannot afford to pay for that service or don’t feel it’s necessary. Personal Protective Equipment (PPE) for

Lutron Dimmer 2" away

EMF from LED Lights and Recessed LED lights Is there significant amounts of EMF from LED Lights? A designer client of mine had a job she was working on, where her client, a homeowner, was concerned about the magnetic fields in her home.  She was designing a remodel, which included the kitchen, and the designer had

EMF Rules of Thumb

Wednesday, 20 March 2013 by
EMF Rules of Thumb

Curious about general best practices for minimizing EMF exposure? This post is an excerpt from the Healthy Home Standard, and it includes many great EMF rules of thumb. This is part of a series about the Healthy Home Standard, and there will be another post on additional EMF best practices. The following EMF rules of

LEED EMF Credit Denied

LEED EMF ID Credit Application The USGBC/LEED recently denied an Innovation in Design (ID) credit application for Magnetic Field (EMF) Reduction. This post includes the official LEED EMF ID Credit Application. The following text is in the traditional formal of an ID credit application and request for a Credit Interpretation Ruling (CIR). Unfortunately the USGBC

LEED EMF Credit Denied

Tuesday, 12 March 2013 by
LEED denies EMF credit

EMF LEED Credit Citing the need for more research on human health effects, and questioning long-established Building Biology approaches to minimizing electromagnetic fields (EMF), the USGBC and denied a recent application for a EMF LEED Credit. Healthy Building Science was the LEED for Homes (LEED-H) consultant for two residential properties (CA and NH) that intended

Tooth Decay Trend in Flouridated and Non-Flouridated Countries

Fluoride, Health, and Drinking Water The addition of fluoride to the drinking water supply began in the 1950s as a method to fight against tooth decay.  Currently, 11 countries in the world have more than 50% of their population drinking fluoridated water. These include Singapore (100%), Hong Kong (100%), Brunei (95%); Australia (80%), Malaysia (75%),

Exposure Limits in US

Exposure Limits in US – Alphabet Soup Exposure Limits in US should be super simple. “Do not exceed #.” But it’s a government regulatory issue… so how simple could it be? Here is a summary of the primary exposure limits used by our government and industrial hygienists in the United States. Permissible Exposure Limits (PELs) – OSHA

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