Purchase standard air purifier accessories from established companies

Filters are the most popular accessory that you may need to change on your air purifier. Changing your filter regularly can prolong the life of your purifier and ensure that the air remains pollutant-free.

I recommend: If you're unsure of what brand of accessories to choose from, a popular air purifier accessories list is at mySimon from CNET Networks. Whether you want room air purifier filters or larger ones, look into Filters-NOW.com. AllergyBuyersClub.com lists air purifier accessories and filters by brand, with more than 15 air purifier manufacturers listed, which makes it easy to locate the accessories you need.

Include carbon filters on your air purifiers accessories list

Oftentimes regular air purifier filters don't eliminate nasty odors, leaving the purified area smelling. To eliminate this problem, certain purifiers come equipped to hold carbon filters. These filters act like a sponge, and absorb the pungent odors found lurking in the air.

I recommend: Bestfilters.com sells a carbon filter replacement to use in rooms where there's cigarette smoke or volatile organic compounds. Air & Water provides activated carbon filters for your air purification system. Sold in packages of two, you should change these filters every 12 months.

Find air purifier accessories labeled as HEPA filters

High-efficiency particulate air filters not only clean the air of dust particles, but they stop mold spores and many bacteria and viruses. HEPA air purifier filters are used to eliminate allergens and help deter asthma outbreaks. Oftentimes there are carbon filters added to eliminate odors.

I recommend: Allergy Be Gone carries several brands of replacement HEPA filters, as well as additional air purifier accessories. Many options provide a discount if you purchase more than one replacement filter. Clean Air Plus carries replacement HEPA filters for some popular air purifiers.