2,900 clothes dryer fires in residential buildings are reported to U.S. fire departments each year
An estimated 2,900 clothes dryer fires in residential buildings are reported to U.S. fire departments each year and cause an estimated 5 deaths, 100 injuries, and $35 million in property loss. ? Clothes dryer fire incidence in residential buildings was higher in the fall and winter months, peaking in January at 11 percent. ? Failure to clean (34 percent) was the leading factor contributing to the ignition of clothes dryer fires in residential buildings. ? Dust, fiber, and lint (28 percent) and clothing not on a person (27 percent) were, by far, the leading items first ignited in clothes dryer fires in residential buildings. ? Fifty-four percent of clothes dryer fires in residential buildings were confined to the object of origin.
Overheating may occur and a fire may ensue
A clothes dryer works by forcing hot air through a turning drum. Wet clothes placed in the drum are then dried by moving hot air. It is possible for a full load of wet clothes to contain as much as one and a half gallons of water. Lint, consisting mostly of small fibers from the clothes and debris in or on the clothes, is created from the clothes as the clothes tumble in the drum. While much of the lint is trapped by the dryer's filter, lint is also carried through the vent system along with moist air. Lint is a highly combustible material that can accumulate both in the dryer and in the dryer vent. Accumulated lint leads to reduced airflow and can pose a potential fire hazard.
accumulation of lint, blockage in dryer exhaust vents also can occur from the nests of small birds or other animals or from damages to the venting system itself. A compromised vent will not exhaust properly to the outside. As a result, overheating may occur and a fire may ensue
Serious hazards occur when dryer vents do not exhaust directly to the outside
Serious hazards occur when dryer vents do not exhaust directly to the outside. Faulty installations can vent dryer exhaust into the attic, crawl space, chimney, or interior walls, which can cause indoor air deterioration and mold buildup. Small birds and animals that nest in dryer vents or other debris can obstruct air flow and prevent proper venting to the outside.The codes require that dryer vents be made of metal with smooth interior finishes, sections of vent duct be securely supported and firmly sealed together, and the total length of the vent duct not exceed 35 feet (shorter if there are Flexible transition ducts used to connect the dryer to the exhaust duct system are required to be not longer than eight feet, not concealed within construction, and listed and labeled in accordance with Underwriters Laboratories (UL) 2158A.20 New construction trends often situate washers and dryers in nontraditional areas of the house, such as upstairs bed-rooms & hallways