Regardless of whether they are powered by electricity or gas, dryers must have a tub that tumbles, a fan that blows air and a heat source. All dryers generate heat, either from an electric heating element or from a gas burner. Air from outside passes over this element or burner and travels into the drum where it permeates clothing and extracts moisture and lint.
Dryer tubs rotate slowly to allow the warm air to flow evenly around the clothes. The rotation of the tub is controlled by a pulley belt connected to a motor. Airflow is crucial to the operation of a dryer. An extractor fan pulls moisture and lint out of the tub and expels it through the vent. If the vent is clogged, air is not able to pass through, preventing the clothing from drying properly. It is best to direct moisture from electric and gas dryers outside to avoid excessive heat and humidity inside the home.
While electric dryers operate on 240-volt heat elements, gas dryers rely on propane or natural gas. Gas dryers emit noxious carbon dioxide gas that must be diverted outside through an exterior vent. Both dryer types are fire hazards if their vents are obstructed with lint, according to HomeTips.