510 sq. ft. Whispure Air Purifier Energy Star Qualified - AP51030S  Product Reviews

"i have found this to be a very favorable machine as it was one of several that my allergy doctor had recommended. i suffer from allergies, chronic sinusitis and nasal polyps making it extremely hard for me to breathe, day or night. in reading consumer reports, the whirlpool 510 ranked best at quietness at low speeds as well as the cadr rating. this machine replaced my ionic breeze machines, which were not at all effective, and i couldn't be more pleased with my whirlpool."

"I have purchased two of these air cleaners (one for the office and one for home). The design allows it to fit snuggly against a wall. Even the highest fan speed is relatively quiet. No assembly required and filters are lasting as long as the product claims suggest."

"Our bedroom is larger than average, with high ceilings. We share the room with our two, dog-pound adopted dogs and their oversized dog beds. This air purifier has worked wonders! You can feel the difference when you walk in there. We keep the door closed at night, with the air purifier running. During the day, the door is open, and the purifier is off. This item is worth the money."