31 Aug '11, 9pm

"These high-capacity fans are easily powerful enough to pull exhaust gases out of a fireplace, wood stove, water...

"These high-capacity fans are easily powerful enough to pull exhaust gases out of a fireplace, wood stove, water...

Home ventilation is supposed to improve indoor air quality. In another case of more is not necessarily better, high-powered kitchen range hoods could be hazardous to health. Many new fans remove air at a rate of more than 600 CFM (cubic ft. per minute)--and some exceed 1,000 CFM. In comparison typical range hoods are rated at 175 to 250 CFM. "These high-capacity fans are easily powerful enough to pull exhaust gases out of a fireplace, wood stove, water heater or furnace," says Dave Brook, Extension Energy Agent with the Oregon State University Extension Service. The problem, called backdrafting, exposes occupants to fumes containing carbon monoxide (CO), oxides of nitrogen (NOx) and other pollutants. Prolonged exposure to low levels of odorless CO can cause symptoms similar to flu, and high levels can even cause death. (See April 1994). "Backdrafting has the potential to b...

Full article: http://oikos.com/esb/53/rangehood.html

Tweets

Especially After Flooding, Test Your Water - Co...

thedailygreen.com 02 Sep '11, 12am

Photo: Istock related articles By Dan Shapley While many Americans get their drinking water from public water systems that...

Obama Caves, Abandons Proposal to Improve Natio...

treehugger.com 02 Sep '11, 9pm

The Obama administration is abandoning its plan to immediately tighten air-quality rules nationwide to reduce emissions of...

Obama Caves, Abandons Proposal to Improve Natio...

treehugger.com 02 Sep '11, 9pm

The Obama administration is abandoning its plan to immediately tighten air-quality rules nationwide to reduce emissions of...

Every year health standards are blocked by Hous...

switchboard.nrdc.org 02 Sep '11, 1am

I am not allowed to make any "implied statement endorsing or opposing any political party or candidate" yet the title of y...