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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

Blown-in-Cellulose Insulation

Wednesday, 21 August 2013 by
blown-in-cellulose insulation

Blown-in-Cellulose Insulation Test Results On a recent project, we recommended a homeowner try Blown-in-Cellulose insulation as a healthy alternative to other insulation choices. Blown-in-cellulose is known in the healthy materials world as a pretty safe insulation choice. But just to be sure the product was safe, we sent a wet sample to a lab for

Kids Going To High EMF School?

Do you want to send your kids to an EMF hot-spot with unknown health ramifications? Are some existing symptoms a result of EMF? Reducing exposure to Electromagnetic Fields or Radiation (EMF or EMR) is a contentious debate in public health and green building circles across the United States. OSHA does provide rather liberal exposure limits for

Energy Efficient Home

Wednesday, 19 June 2013 by
Energy Efficient LEED Home

A Comfortable and Energy Efficient Home through Science – Part 1 I am a big believer in using principles of science and an understanding of the sun’s movement through the sky to enhance your comfort while also making it a more energy efficient home. I am going to devote the next few blogs to giving

Asthma and Buildings

Friday, 10 May 2013 by
Asthma and Buildings

Asthma and Buildings – California and US Trends in Asthma Buildings are too often neglected in the asthma equation. Asthma is sometimes defined as a symptom of poor indoor air quality, and other times defined as a Building Related Illness. This blog references the recently released report, “Asthma in California: A Surveillance Report,” compiled by

Green Point or LEED?

Thursday, 02 May 2013 by
Green Point or LEED

Green Point or LEED? For homeowners trying to make sense of the many green building rating systems out there, it can be confusing and frustrating–Green Point or LEED? This blog is an attempt to shed some light on the issue. Here in California we are fortunate to have the “GreenPoint Rated” (GPR) system published and overseen

Healthy Building San Francisco

Healthy San Francisco Earth Day! We had a lovely, healthy San Francisco (420) day – April 20th!  Our Healthy Building San Francisco Earth Day booth was in the center of Civic Center Plaza with a great view of happy, healthy people AND San Francisco City Hall! See a few Thermal Portraits below… Healthy San Francisco

RoHS Compliant Healthy Appliances

This blog expands on an earlier post about the 25 Principles of Building Biology and the Healthy Home Standard Checklist. Here we’ll dive deeper into the Indoor Air Quality Checklist, and focus on best practices for healthy appliances and building materials. This is part 3 of 3 – IAQ Checklist. Here is what Building Biologists thought were the

Vinyl House

PVC (Polyvinyl Chloride) is one of the pervasive and toxic materials used in the building industry. It is the third-most widely produced plastic, after polyethylene and polypropylene. PVC production is the largest use of chlorine gas in the world. PVC consumes about 40 percent of total chlorine production, or approximately 16 million tons of chlorine

EMF Best Practices

Wednesday, 27 March 2013 by
Demand Switch - Low EMF Best Practice

This is part of the series on the Healthy Home Standard, and this second part about EMR is a follow up from an earlier post (EMF Rules of Thumb). EMF best practices covers low frequency electric and magnetic fields, as well as Radio Frequency (RF) radiation. EMF best practices are intended to reduce exposure to Electromagnetic Fields



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