The Biozone InDuct 2500 air purifier is for the average size home or office or smaller spaces with higher pollutant levels; perfect for up to 2500 sq. ft. This air cleaner is installed in ventilating systems for central air purification. Will significantly reduce pollutants and contaminants in homes and businesses. Safer, healthier environments for family, employees or customers free from contaminants and allergens. Purifying Method - Photoplasma Housing Material - ABS Electric - 12VDC with accompanying adapter Dimensions - 3.4" x 1.25" x 5.25"; lamp length varies depending on mode