[taltos]

There are some machines such as the Bionaire Hepa Filter machines that also include an air ionizer which is different than an ozone machine. These work very well but the downside is that the machines run over $100 for a machine to take care of a large room and I am not sure of the price for the optional ionizer. The replacement filters are also relatively expensive. These are among the most effective air cleaners on the market. As an alternative, some folks have had luck by running a room humidifier after smoking. I don't know why this works but it seems to do a decent job. Hope that this helps.