As I usually do in my reviews, I’ll comment on the environmental effects of the packaging. Except for some small foam-like inserts to protect what is both an appliance and instrument, the balance of the packaging is recyclable cardboard. The manufacturer comments on its commitment to environmental sensitivity in the manual, and it is evident.
The company make several different series of air purifiers, and this Classic 408i is intended to be used in space of about 400 sq. ft. Thus the air in a room as large as 20 x 20 feet should be easily cleansed. In this same series there are more basic models, but this one has a number of automated and enhanced features which will be discussed shortly.
With dimensions of 23 x 20 x11 inches, it is small, but not unobtrusive. The modern Swedish design however helps it blend in to most room decors. The Classic 408i is portable in that it weighs 33 lbs. It does not, however, have wheels but does have comfortable handles.
Most of the initial set-up is a snap requiring only that the rear hinged panel be opened for access to the filter which needs to be unwrapped from its plastic protection. The ease of this process indicates that future filter changes will be simple and quick. After plugging in the unit and tapping the comfortably sensitive fan-speed button, the unit is working.
One aspect of the set that is not as easy is installing and using the Blueair Friend Mobile App. Connecting the purifier to the wi-fi was a slow and often-frustrating chore. Since it only works on the 2.4 GHz band it was necessary to temporarily “sleep” the 5.0 GHz bandwidth on my mesh system. Linking everything was far from plug-and-play and seemed outdated. The app does allow remote control of some functions and also contains information about possible pollutants. Whether a remote function is even necessary for this type of appliance is a question that users will have to decide for themselves.
The control panel is generally intuitive, but initially there is the likelihood of confusion as the rings that surround each change color to indicate status and the inner symbol may have a different color to indicate. For the first few weeks, keep the helpful and clear manual nearby.
Electrical consumption is minimal: After 24 hours on medium speed my plug-in usage meter showed less than 1 Kw.
On the control panel, nicely hidden by a cover, the soft-touch buttons are, from left to right, Wi-Fi set-up and status indicator, fan speed selector/indicator, filter status, auto speed operation on/off, a VOC indicator, and a PM 2.5 indicator for the presence of extremely small particulate matter.
Noise levels vary significantly. At the lowest speed, the sound is virtually imperceptible; the middle setting generates modest noise comparable to white noise and certainly not obtrusive. At the highest speed setting (which the manufacturer rates at 52dB(A)) the noise is disruptively loud anywhere near the purifier. These are, of course, subjective interpretations and others will react differently.
How effective is the 408i? It is hard to say. During and after cooking a smoky meal the 408i (on high speed) seemed to clear the air of cooking odors quickly. That was easy to determine. After many days of use, I cannot meaningfully evaluate its performance in other areas with one exception. Immediately after having some new carpeting installed, the VOC indicator turned orange (from green) and an hour or so later it had returned to green. Apparently, the sensors worked as advertised and the cleansing started and ended automatically. Well done, BlueAir!
Overall, a good, solid appliance that seems to offer many valuable features.