Environment
Moderate burden — Idling a Vehicle in an Attached Garage adds a moderate, reducible exposure.
Warming up or running an engine with the garage door closed.
Each driver rated 0 (none) to 10 (worst)
Evidence strength: strong · Detox Score = 100 − hazard×4.6 − exposure×3.4 − persistence×2.6, clamped 1–100.
A Detox Score of 47 places idling a vehicle in an attached garage in the Moderate band. The chemical-hazard rating is what drives the score down. Exhaust in an attached garage carries carbon monoxide and benzene into the living space through the shared wall, and concentrations build quickly in an enclosed space. Backing out before starting removes the exposure completely and costs nothing.
Idling a Vehicle in an Attached Garage has a Detox Score of 47 out of 100 (Moderate burden), which means it adds a moderate, reducible exposure. Exhaust in an attached garage carries carbon monoxide and benzene into the living space through the shared wall, and concentrations build quickly in an enclosed space. Backing out before starting removes the exposure completely and costs nothing.
A lower-exposure swap for idling a vehicle in an attached garage is: Reverse out first, and never run an engine in a closed garage. Exhaust in an attached garage carries carbon monoxide and benzene into the living space through the shared wall, and concentrations build quickly in an enclosed space. Backing out before starting removes the exposure completely and costs nothing.