The Prior Concerns of a HEPA Air Purifier
The prior concerns of a HEPA air purifier are the filter replacement costs and noise level associated with delivering the air through the HEPA filter. Noise level can be subjective and some people really like the white noise and can't sleep without it while others can only sleep in a silent room. The HEPA purifiers have fan speed settings and you can control the noise level to find a setting that is comfortable for you while still helping your allergies or other air quality concerns. Since the filter media is dense it requires a stronger fan than other types of air purifiers but the power difference is less than what is used by a light bulb.