Ships from and sold by Rabbit Air. Genuine Rabbit Air BioGS AC Charcoal Filter (SPA-421A and SPA-582A) Original Rabbit Air MinusA2 filter replacement kit [Germ] Shipping Information: View shipping rates and policies #26,254 in Beauty (See Top 100 in Beauty) 5 star75%4 star14%3 star6%2 star4%1 star1%See all 95 customer reviewsTop Customer ReviewsWorks as promised. Lasted longer than stated.Pricey but does the jobThese replacement HEPA filters are expensive, but they work just as well as the original BioGS SPA-421A/582A filters did.WILL NOT QUITLove Rabbit AirExcellent MacinePerfect factory replacement with high airflow and effective filtration.Industrial designer Guto Indio da Costa’s concept of "flow" resonates throughout the BioGS 2.0. The curvaceous body of the air purifier reflects its relatively simplistic but comprehensive functionality, and its clean, cool, and straightforward style. By reimagining the original air purifier's structure and streamlining its key features, da Costa has revolutionized the latest generation of Rabbit Air products, with a new model that’s stylish, unobtrusive, and user friendly.

We designed the BioGS 2.0 to blend in with and complement your home. The whisper-quiet technology is a welcome departure from the typical noise of other air purifiers and the intelligent display will dim when idle to reduce unnecessary light pollution. Turn on your BioGS and breathe in peace. The heart of our air purifier is the Brushless Direct Current Motor (BLDC), an innovative motor with inverter control that operates at five different speeds. At its lowest speed, the purifier barely makes a sound. The user interface automatically lights up when you need it, and dims to conserve energy when you don't. Economical With our Energy Star rated design and filters lasting up to three years, based on 12-hour daily operation, the BioGS 2.0 keeps annual costs low. The air purifier is capable of up to four air changes per hour. The unit’s features can only be managed with the remote control. User-friendly features, a large coverage area and a low noise rating make the BioGS one of the best air purifiers on the market.

Editor’s Note: This product has been removed from our side-by-side comparison because it has been discontinued. You can still read our original review below, but Top Ten Reviews is no longer updating this product’s information. The term HEPA is an acronym for "High Efficiency Particulate Air." HEPA filters are a common tool used in many mechanical air cleaners to filter small, unwanted, and unhealthy particles out of the air. greentech gt50 air purifierThey consist of a web of fibers arranged in a random pattern.air purifier costco therapure The first HEPA filters were designed by United States Department of Energy in the 1940s, though it was not until the 1950s that they began to enjoy widespread commercial use. fungsi air purifier coway

Since then, there have been advances which have improved upon the original HEPA filters, but their basic design and function has remained the same for over half a century. According to the online encyclopedia Wikipedia, air purifiers with HEPA filters operate differently than a typical membrane filter. Non-HEPA filters generally have only very small pores, so that any bits of matter too large to fit through them are trapped. HEPA filters, however, operate based on a different principle. The space between HEPA fibers is actually often much larger than the particles a HEPA filter targets. Instead, HEPA filters catch particles through a combination of three different mechanisms: (Image courtesy of Wikipedia Commons - Author: LadyofHats) Diagram information - Image shows the essential parts of a HEPA filter; the 3 smaller diagrams show how it works: As the numbers above indicate, there is a narrow size window around .3 microns, inside of which the particles are less likely to be trapped by a HEPA filter.

This is called the Most Penetrating Particle Size (MPPS). However, particles of this size are still captured by the filter, albeit less efficiently. The best measure of a HEPA filter's true worth is its ability to filter out particles within the MPPS range. A standard way to test the effectiveness of HEPA filters is known as the "DOP penetration test." This involves sending a cloud of particles .3 microns in size through filter and comparing how highly concentrated these particles are in the airstream before and after they pass through it. According to the United States Environmental Protection Agency, HEPA filters are the most effective filter commonly found in mechanical air cleaners. To quote the EPA's guide to residential air cleaners: "True HEPA filters with a MERV between 17 and 19 are defined ... as having a minimum efficiency between 99.97 percent and 99.999 percent in removing 0.3 [micron] particles." MERV stands for "Minimum Efficiency Reporting Value" and represents the purifier's ability to clean the air.

Usually MERV numbers fall between 1 and 16, but ratings of 17-20 are sometimes used for HEPA filters. However, the EPA also warns of diminishing returns, to the point that using a stronger and more effective filter is no longer cost-efficient. It claims that cleaners with a MERV rating from 7-13 "are likely to be almost as effective as true HEPA filters" for most common purposes, and they will also be quieter and less expensive. Installing HEPA filters in large air cleaners will often require professional installation, further adding to the cost. Also, in small, portable air cleaners, HEPA filters "may not be preferable to medium-efficiency filters because of HEPA filters’ lower air delivery." Therefore, there are limits to the effectiveness of HEPA filters. On the other hand, they may be preferable to the so-called "HEPA-type" filters that are commonly found in lower-end small air cleaners, simply because HEPA filters must meet certain standards to be called HEPA, while "HEPA-type" could mean nearly anything.

Keep in mind that the "P" in "HEPA" stands for "Particulate." HEPA filters only target airborne particles, not gasses. Although this means that a HEPA filter will help clean the air of many common pollutants, it also means that many others will pass right through the filter undisturbed. Many of the better air purifiers on the market will combine a HEPA filter with some other system that targets gaseous pollution, such as an activated carbon filter. Therefore, consumers are advised to consider their needs and all of the features of air purifiers before deciding which to buy. As indicated above, HEPA filters also tend to be more expensive than other filters. Filters will almost always need to be regularly replaced at least once or twice a year, as well, meaning that there is an extra recurring cost in addition to the initial price of the purifier. This typically isn't large, but over time it does add up. Of course, some customers may decide that this an acceptable price to pay for the HEPA filter's power and reliability.