Though air-purifier companies often claim their machines to be silent, the commonest complaint from users of most air-purifiers is “Noisy at high speed” or “Noisy above low speed”. However, everything – including silence – has a price.
*Note: If any air-cleaner/purifier is marketed without a noise specification (decibels), assume it to be loud. The Quietest air purifier will have noise of 15 dB(A), and a typical air purifier running on low gives of 36 dB(A) noise.
Blueair 603 HepaSilent Air-Purification System
The Blueair 603 HepaSilent air-purifier employs both mechanical and electrostatic air filters to deliver efficient vacuuming. It is also one of the quietest room air purifiers in the market, with eight models to choose from;
Whirlpool Whispure 510 Air Purifier
The Whispure air-purifier covers 510 Sq. Ft., and features a HEPA Filter and a filter-replacement indicator; it operates quietly.
Bionaire Air Purifier
One of the most silent air-purifiers recommended by market sources is the Bionaire Air Purifier model BAP1300, which features a two-stage purification system. Made to fit allergic individuals, it removes pollen, dust mites, animal dander, smoke, odors, and other allergens. The other features are: 4 air speeds, an odor-capturing pre-filter, a CADR of 315 (very good), effective for 500 sq.ft. rooms, remote control, and filter monitor. However, the filter should be changed once in 3 months. This air-purifier works quietly and efficiently.
Airfree Onix 3000, Platinum 2000 & P1000
These air-sterilizers are not only very good virus air-purifiers, but also work in total silence. Their noise-ratings are excellent. Airfree air-sterilizers employ a ceramic core patented technology to kill/destroy any organic matter such as: bacteria, viruses, pollens, cat/dog dander.