The terms air purifier and air cleaner are completely interchangeable. By understanding what air purifiers are and how they work, it is easier to zero in on the right one. Our award-winning Infinity air purifier doesn't just filter air: Its Captures and Kills™ technology is unforgiving when it comes to airborne pathogens such as bacteria, viruses and mold. Grizzly? Yes—if you’re a mold spore. This whole-house air cleaner also re-purifies circulated indoor air as many as 8 times an hour. Those poor pathogens don’t stand a chance.