(Price/EA)Harmony 99% HEPA/carbon filter air purifier, 120 sq. ft. room capacity Price is for EA.

99% HEPA filter helps remove airborne particles and allergens. Filter Type(s): Modular, HEPA/Carbon (uses only one); Filtration For: NA; Maximum Room Size (W x H): 10 ft x 12 ft; Width: 8 1/4 in.

Hunter Hepa Tower Air Purifier Twin Pack Each contemporary designed tower air cleaner quietly purifies the air, six times an hour in a room 13′ x 11′ in size; for a total of nearly 300 sq. ft. A separate ionizer control allows you to manage ionization to your individual desired level. Ultra quiet 3-speed motor including a sleep mode and a turbo clean for extra cleaning power. A robust charcoal pre-filter enhances odor removal 30% better than other brands. Electronic led indicator lights shine when its time to replace your filter. HEPA filters last 1-3 years, optional charcoal pre-filters last 3-6 months. Quiet enough to run all night, powerful enough for tough jobs.

Honeywell Vicks V9071 HEPA Nursery Air Purifier The V9071 HEPA air purifier is 99% efficient at reducing airborne particles such as dust, tobacco smoke, pollen, cat dander and mold spores from the air that passes through it. Plus, the independently controlled ionizer delivers extra cleaning power and helps freshen the air. An electronic filter indicator illuminates to remind you when to replace the filter. This compact air purifier fits great on a tabletop and is ideal for nursery, playrooms, children’s rooms and smaller living spaces. Recommended for small rooms (10′ x 10′). Recommended room size 10′ x 10′ (110 sq. ft.) AHAM CADR Rating - 70

Blueair 501 Air Purifier with SmokeStop Filter - HEPA-Silent Air Cleaner with Gas and Odor Filter Quiet and efficient HEPA-like air purifier with smoke, odor, and gas removal. For those who want quality but quiet filtration. Popular for bedrooms of up to ~550 sq. ft. Recommended for people with allergies or asthma.
Customer Review: Better than great
Works very well at filtering the air. this one was actually too powerful for my bedroom even at the lowest setting. There is a noticeable difference in the air when the Blueair is on. All speeds are very quiet except for the highest setting which is disproportionately louder than all the other settings. The product itself is very sturdy and well made. For anyone with allergies this is a great product that will no doubt make a difference.
Customer Review: good
While it’s difficult to directly measure the effect that this air filter is having on the environment with any degree of certainty without tools to measure air quality it certainly seems to me to be doing a good job. I wake up feeling better, and my sinuses have stopped giving me trouble. I’m able to breathe much better, and through both nostrils, consistently; it’s been so long since I could do that I’d forgotten what it was like. I believe I’m even sleeping better because of it. And it is QUIET, on the low setting I dare say silent. I kept looking at the blue light to be sure it was on. The only complaint: I got the activated carbon filter and, apparently during shipping, some of the black dust got into the container an left noticeable black marks on a few places on the outside of the filter case. I haven’t found any cleaner that will take them off yet, very stubborn. Oh, and the shipping was kind of slow.