Air Purifiers

i have asthma and was told that a HEPA air filter would help a lot, especially since i keep two parakeets in my room and they can cause dander. so, i wanted to know how much they cost and is an air purifier the same thing? I saw air purifiers at walmart and some said that they produce hot air and other said that they produce cool air? which should i get? hot or cold? thanks!

I was wondering how a HEPA air filter works (not down at the molecular level but if you’re supposed to plug it in somewhere and let it work it’s magic). Also if you need to buy replacement filters or if you just need to clean it every couple of days and etc.

I would like to know the same about Oreck air filters or any others…I don’t want to buy an air purifier that requires me to constantly purchase new air filters and etc.

I have really bad allergies and am looking into getting a Hepa Air filter/cleaner/purifier for just my bedroom (since I can’t afford to do the whole house).

Can you give me your opinions of which works well for you and the cost ?

Thanks

I have a HEPA air filter. It has a button on it, which turns on the optional "ionizer" feature. The system is made by Honeywell (actually a company called Kaz, which sells it under the Honeywell name.)

Any information on the helpful effects of having "negative ions" in the air?