The Gard’nClean Extended Release deodorizer is a next- generation, humidity activated ultra-pure chlorine dioxide (CIO2) generator. This simple to use product improves air quality for up to 30 days. GC Extended Releases are ideal for odor mitigation protocols and limiting cross-contamination of odors and VOCS (Volatile Organic Compounds). Size GC-2.5K-ER (up to 2,500 cu ft)