Bemis Imunsen Smart Tower Air Purifier Review: Not So Smart


The latest smart air purifier to hit the market comes from Bemis, a growing manufacturer that makes everything from humidifiers to toilet seats. The Bemis Imunsen Smart Tower Air Purifier is exactly what its name suggests: an off-white (and somewhat medical-looking) 19-pound device that stands 29 inches tall and measures 10 inches on each side.

Air enters through three sides at the base and exits directly upward through an attractive panel at the top. The removable top panel is made of maple wood and carved in the shape of a beehive, which gives it a natural aesthetic. The unit is also available in black, if that’s more in line with your decor.

This review is part of TechHive’s coverage of the best air purifiers, where you will find reviews of competing offerings, as well as a buyer’s guide on the features to consider when purchasing this type of product.

Functions and functionalities

Bemis doesn’t offer CADR (Clean Air Delivery Rate) ratings for the purifier, but it does say that the unit can filter 265 cubic feet of air per minute and has a usable area of ​​782 square feet. Its multi-stage cylindrical filter is accessible through the back of the device. Here, a HEPA 13 filter is the centerpiece, plus a “deodorizing filter” that goes into town on VOCs and other smelly gases. The filters are said to last about a year and replacements cost $ 100 each.

On the front of the unit, a minimalist LED below the surface offers a numerical indicator of PM2.5 levels (particles in the 2.5mm range), plus a colored LED that suggests good air conditions (green), average (blue), or bad (orange).

A series of buttons along the top of the device gives you access to many of the expected controls, including four operating modes: a dynamic automatic mode that changes power according to the level of contamination, three levels of manual control, a full blast cyclone mode, and a sleep mode that automatically reduces fan speed when it gets dark, dimming the screen. Please note that the sleep mode is strictly light sensitive; If any light enters the room, the unit will quickly return to automatic mode and will not return to sleep mode even if you turn off the lights. It’s a poorly thought-out feature, but a bit of electrical tape over the light sensor can provide more flexibility if you sleep during the day or just don’t want any more LEDs around you. All modes outside the lowest operating level and sleep mode are quite noisy; Cyclone mode is deafening.

One final feature is the ability to add an essential oil capsule to the device, which is useful if you want the purifier to do double duty as a scent diffuser. This is not the easiest process as it requires removing the wooden panel from the top (a special tool is provided) and then removing a safety net under that panel with a screwdriver. From there, an oil capsule can be dropped into the guts of the device, after which everything must be reassembled. Capsules are available in eucalyptus or lavender; each lasts two to three months. A pack of three capsules costs $ 50.

Smart capabilities

bemis imunsen tower air purifier app Christopher Null / IDG

There isn’t much to see in the app, although it does at least replicate the drive’s hardware controls.

The unit includes smart features, but these are extremely basic and add little to the experience. The Bemis Air app has a lengthy and crudely documented installation process, requiring registration, as well as manually connecting to the unit’s temporary Wi-Fi network (2.4GHz only), a process that includes digging up a network password that is only printed in the manual. (Pro tip: it’s “bemisair”.) The app crashed once during setup for me, but restarting it a second time helped me get through in one piece.

Once in the app, the options are limited. The application screen recreates the controls available on the unit itself and offers the same color-coded PM2.5 information. There is no historical record of pollutant levels, no programming modes, or connections to third-party ecosystems like Alexa. The only additions within the app are real-time temperature measurements (degrees Celsius only), a filter level indicator, and “humidify” (aka the humidity in the room).


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