Last Updated: Wednesday, November 22, 2006 | 7:24 AM AT

CBC News

Louvred dryer vents are prone to sticking shut, causing a potential for fire, warns P.E.I. fire marshal Dave Blacquierre.

Blacquierre said some of the vents, with slats which close to keep cold air out when the dryer is not in use, can freeze up in cold weather.

"The temperature ordinarily achieved inside a dryer is normally anywhere from 130 degrees Fahrenheit to 150 (55 to 65 C)," said Blacquierre.

"If the dryer vent is stuck in the closed position that temperature can rise to as much as 250 degrees Fahrenheit (120 C), too much for there not to be a fire to happen."

Blacquierre said if people have these vents they should either replace them immediately or ensure regular maintenance.