Infinity Air Purifierby Carrier

Available in four cabinet sizes to fit most Carrier furnaces and other ducted HVAC systems, the Infinity air purifier captures and kills airborne allergens, bacteria, molds, and viruses through a three-step filtration process, the maker claims. Combining filtration with pathogen-killing technology, the air filter captures and charges particles entering the device and eliminates pathogens using ion bombardment and electric current. 800-227-7437. www.carrier.com.