Eliminates odors naturally by producing controlled amounts of ozone. They destroy smoke, mold, mildew, food, pet, and paint odors with absolutely no chemicals involved. Features maintenance-free aluminum housing; a heavy-duty on/off switch; recessed control knobs; variable ozone output; detachable fan filter housing with washable filter; detachable heavy-duty grounded power cord; safety switch that cuts power when cover is removed; 115 CFM fan; exterior-mounted circuit breaker; and neoprene feet/rounded lines. 60 Hz, 115V. CSA-approved; UL-listed. 2-year warranty on parts and labor and 30-day return policy. RainbowAir 250 works economically and services smaller rooms up to 750 sq. ft. It uses only 38 watts (maximum) of power to produce 40 - 250 milligrams of ozone per hour. The electronic timer can be set from 0 - 60 minutes.