Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...Engine rooms and confined spaces are among the highest-risk areas for gas accumulation...