what is the best air purifier to use if you have birds. They create a lot of feather dust.?
I have 3 birds and they create a lot of feather dust. I would like to buy an air purifier to cut down on the dust and dander.There are a lot of purifiers out there and I’m confused about which one would work best for me and also be the most inexpensive as far as filter replacement is concerned.

Since your main concern is dust, your best choice will be air ionizer or HEPA purifier. Ionizers are effective against all particle size, including the smallest and finest air particles. They don’t have filters, all you need is to wipe collector plates with a cloth once a week – that’s it. They are also completely noiseless, while HEPA filters can e quite noisy because of the fans.
The best air purifier on the market for birds is the Sun Pure SP-20C (same as Continental Fan CX1000) at http://www.allergy-relief-air-purifier.com/portable-air-purifiers.html It will take care of the dust and odors that are associated with birds. Not only is this good for you and your health, but for the health of the birds. The only air purifier that comes close is the IQ Air GC and that is compared here http://www.allergy-relief-air-purifier.com/best-home-air-purifier.html The Sun Pure SP-20C is much more affordable to purchase, plus it is more affordable to maintain. It also comes with a lifetime warranty, so it will be the last air purifier you will need to purchase. I hope this helps.
You’re going to need a purifier with the largest HEPA filter you can find in your price range. The best HEPA filters will typically last a couple of years actually with normal use so it’s worth looking at the filter replacement price as kind of a monthly expense, even though you pay for it at one time.
The cost of running a good purifier most of the day along with filter replacement can be less than 10 bucks a month. That’s not much considering how much birds cost and the fact that it’ll be beneficial to your health and your birds’ health.
You’re going to want to focus on higher-end manufacturers, as they’re the only ones that make models that actually work. And avoid the ionic purifiers completely. They actually generate a small amount of ozone and are next to useless at dust collection.