When we look at the data side by side from the Flex and 45i, it becomes clear how close they are in cleaning performance. With only a minute between them, the Flex works harder than the 45i to match its results. You probably won’t be able to tell the difference in a smaller room. When you first unbox your Alen air purifier, be sure to remove the plastic packaging from the filter before you start using the unit.
The Alen® BreatheSmart Classic is a great value with coverage up to 1,100 square feet and all the steadfast power, noise reduction and efficiency of its big brother, the 75i. The Classic’s 3-color rings with laser sensor technology continuously monitor your alen breathesmart air quality. Alen’s signature color ring signals what it’s sensors are detecting in your UtopiairTM. But the same things that make it a tough sell for home users—its size, its app, its hefty asking price—suggest it’s more suited for commercial environments.
Alen® air purifiers are engineered to outperform by combining power with efficacy and superb filtration technology. And our beautifully designed, whisper-quiet units do it without disrupting your conversations or your lifestyle. We don’t all know how loud decibels are and what some people consider loud, others may not. That’s lasko pedestal fans why we take videos of all the air purifiers we review, recording each unit at their different fan speeds. Both units come with an AQI (Air Quality Indicator) color wheel in the center of the control panel. Using data provided by the air purifier sensors, this light displays the air quality in your room using five colors.
Keeping your pre-filter clean will extend the life of your air filter and keep your purifier working at peak efficiency. Pre-filters can be removed and cleaned by vacuuming, but some lasko pedestal fans customers prefer to discard their heavily soiled pre-filter and exchange it for a fresh one. This pre-filter is intended only for the BreatheSmart 45i or the BreatheSmart FLEX.
It was a close call between the 45i and the Flex regarding design, filters and the numbers, with only one minute to separate them in our cleaning performance tests. The difference comes with the features included and the annual running costs. When you compare these two to some of the other air purifiers we’ve reviewed of similar size, you’ll see they are a little louder.
✅ If you want to pay a little extra for features like an auto mode and the choice of ionization — go for the BreatheSmart 45i. Replacing your filter periodically ensures you’ll have plenty of room to trap those harmful contaminants from the air in your home. As the 45i and Flex are the same size, Alen decided they could use the same filters for both. First, we bought the BretheSmart 75i, which showed us how powerful Alen units can be.
This shows that the Flex is working harder overall as it has a lower CADR of 225 CFM compared to the 45i, which has 245 CFM. Seven touch-sensitive round buttons are placed along the black glossy top of the 45i to adjust its settings. When it comes to the design aesthetics, it’s a draw as these two both look virtually identical. Let’s do a simple calculation to figure out how much electricity will the Classic model need.
Put the FLEX to work cleaning up to 700 square feet of air every 30 minutes. Add a customizable filter for your specific needs in each space, and you’ve got pure air, everywhere. We’ve calculated this using the B4-Fresh filter, which we recommend for most household pollutants.