Dryer Vents
From NachiWiki
Faulty dryer vents have been responsible for thousands of fires, hundreds of injuries, and even deaths. The best vents are a smooth-walled metal type that travels a short distance; all other types should be regarded as suspect, and should be inspected bi-annually to ensure that they do not contain trapped lint or moisture.
Today's standards for new construction specify that corrugated pipe may be used only within the first 8 feet and may not be concealed within construction. The concealed ducts should be rigid metal ducts or equivalent, vented to the exterior of the home. This is recommended for fire safety reasons.
For Further Reading
http://fixitnow.com/appliantology/dr...t_ultimate.htm
http://www.cpsc.gov/CPSCPUB/PUBS/5022.html
http://www.dryerbox.com/dryer_venting_guide.htm
http://www.diynetwork.com/diy/ha_ins...277638,00.html
This article was originally based on posts by Marcel R. Pyr, Robert J. O'Connor, and Keith Swift on the NACHI message board.
