They are convinced. You have done your research. You have consulted the air quality experts. They know HEPA grade air purifiers are exactly what you need. You’re ready to whip out your credit card and grab the best deal on HEPA air purifiers you can find.
But hold on! HEPA may be the best game in town, but are all HEPA air purifiers the same? Not for a long time! You need to know when HEPA filters are out of HEPA performance.
What is wrong here? Quality issues affecting the performance of your air purifier
At this point in your research, you know that HEPA filtration removes almost 99.99% of the particles in any size range. The lowest performance is an efficiency of 99.97% with 0.3 micron particles. But that’s the theoretical efficiency. What about the real world What about the real performance? Which factors rob you of the cleanest possible air?
Would you believe that some air purifiers are intentionally less efficient? Why? Because they’re cheap, that’s why!
Yeah, good old discount, cheap Medical Grade Air Purifier. You have to be less efficient. One of the most expensive components in high quality air purifiers is the engine. Lower the cost of the motor and you lower the cost of the air purifier.
But a cheap motor cannot permanently work against the back pressure of a HEPA filter. It’s overheating. It wears out, burns out, and dies. So what to do Manufacturers design air bypasses in the machine. The pressure is relieved and the cheap engine can be cooled with bypass air.
Unfortunately, you lose air purification efficiency.
Reduction in the cost of the HEPA filter
High quality air purifiers use high quality HEPA filters. How do you know how your air purifier compares? Simple. Manufacturers are always happy to make their own horn. So listen to the melody they play
Manufacturers using reduced rate HEPA filters will most likely remain silent about significant quality issues or mumble otherwise incoherent nonsense.
What are the main quality problems with HEPA filters?
First of all, size matters. The bigger the better. Larger surface area HEPA filters remove more particles before they clog, so they last longer. You can also let a higher volume of air pass through and remove more particles with each pass.
Second, the quality of the HEPA filter material and the construction are crucial. Creases should be uniform and held in place with spacers. Unevenly distributed folds restrict airflow.
The best material for HEPA filters is thin paper, but this is delicate and can be easily damaged by the pleating process or when installing it in the air purifier. High quality air purifiers often have HEPA filters that have been pleated through a process called “hot rolling”. This prevents efficiency-consuming cracks from developing in the folds.
Better quality air purifiers also house the filters in a way that prevents damage.
All of these quality marks are proudly touted by the manufacturers who use them. Reputable dealers who really understand Medical Air Purifier will also make sure you are buying quality. Better still, the dealers most devoted to your satisfaction only sell air purifiers that really work as expected.
Some examples of high quality air purifiers
Personally, I own an Allerair air purifier. They fully address the issues discussed above. Another very good choice is IQAir. They test and certify each air purifier they build individually for overall system efficiency. You will receive the certification document so that you know exactly how well your personal air purifier is working.