Queenaire QTT24-IIQt Thunder 24-Ii Odor Eliminator and Deodorizer QT Thunder-24 -II eliminates odors on a programmed basis without the attention of an operator. For areas with ongoing odor problems such as locker rooms, school rooms, day care center, etc... this compact unit gives you the freedom of setting a schedule for treatment and then forgetting about it. IMPORTANT: OZONE IN HIGH LEVELS IS NOT RECOMMENDED FOR OCCUPIED AREAS.