The AirFree Mold and Germ Destroying Air Purifier uses heated air to kill off all nasty airborne bacteria, viruses and mold stuffs. Interestingly it reduces indoor ozone levels, rather than pump the stuff out, which should please asthmatics. Comes with an in-built night light. $239.95.
With no filters to replace or clean, the compact cleaner pulls air into the internal chamber which is heated to 392F to silently destroy mold, airborne bacteria, viruses, pet dander, and common household dust mites in a room up to 30′ x 18′. Despite its high internal heat level, the purifier will not change the room temperature. For the highest level of air purification, it is recommended for us e 24-hours a day, every day, yet it draws less power than a 60-watt light bulb.