Abstract: Disclosed is an improved dryer vent alarm system that has an elbow shaped vent conduit attachment that contains sensor(s) for dryer operation and for air flow to enable detection of and input to an alert module for reduced air flow from the dryer that may indicate vent plugging. Embodiments include a dryer vent system comprising: a dryer exhaust conduit attachment having a dryer operation sensor and a flow sensor that communicates with an alert module to provide an indication of reduced or disrupted air flow from a dryer, wherein the exhaust conduit attachment is a rigid or semi-rigid circular elbow shaped conduit, one end adapted to be attached to a dryer outlet and the other end to a conventional vent conduit.

Abstract: A dryer exhaust duct alarm detects the presence of lint or other obstructions in an exhaust duct or vent. A thin lever is suspended within the duct and is slightly cupped in shape to more effectively capture air flow. In the presence of uninhibited air flow, the lever is substantially displaced from its initial substantially-vertical position toward a substantially horizontal position. But when airflow is inhibited, the lever is not sufficiently displaced. A detector detects operation of the dryer. If the dryer operates for a determined period of time but the lever is not sufficiently displaced, the user is alerted of the problem. Other data may also be presented to the user, including real-time data over a communication medium.

Abstract: A dryer exhaust duct alarm detects the presence of lint or other obstructions in an exhaust duct or vent. A thin lever is suspended within the duct and is slightly cupped in shape to more effectively capture air flow. In the presence of uninhibited air flow, the lever is substantially displaced from its initial substantially-vertical position toward a substantially horizontal position. But when airflow is inhibited, the lever is not sufficiently displaced. A detector detects operation of the dryer. If the dryer operates for a determined period of time but the lever is not sufficiently displaced, the user is alerted of the problem. Other data may also be presented to the user, including real-time data over a communication medium.