Quiet Air Purifier - What You Should Know Before Purchase

Most people buying their first air purifier are surprised at the noise it makes in the home. Only a few are really quiet.

Despite the universal, and often false, "quiet" claim by air purifier manufacturers, “Noisy on the high speed” is by far the most frequent consumer complaint.

The real issue is not how loud a purifier is on high, but how much sound it makes while cleaning meaningful amounts of air. Several premium air purifiers are loud on high, but offer as many as six speeds for useful quiet air purification.

The Decibel (dB) scale measures noise in objective terms.

On the Decibel scale, each 10 points [dB(A)] added represents 10 times as much sound. For example; 70 dB(A), is not 17% louder, but ten times as loud as 60 dB(A). With many purifiers topping out in the low 70’s, louder than normal conversation, sound levels are a major consumer concern.

A few Decibel ratings;

Threshold of human hearing: 0 dB(A)

Quietest air purifier: 15 dB(A)

Soft whisper: 20 dB(A)

Good air purifier on low: 32 dB(A)

Ordinary air purifier on low: 36 dB(A)

Refrigerator: 50 dB(A)

Normal conversation: 60 dB(A)

Dishwasher running: 55-70 dB(A)

Typical air purifier on high: 66 dB(A)

Busy street traffic, loud air purifier: 70 dB(A )

Car interior: 75 dB(A)

Vacuum cleaner: 80 dB(A)

Common home stereo: 80 dB(A)

Lawn mower: 90 dB(A)

Rock concert: 110 dB(A)

The air purifier industry has no standards for noise levels. Only a few vendors voluntarily reveal actual decibel sound emissions.