Kenmore is a smaller player in the air purifier industry, but their purifiers are built to last, just like many of their other products. Nowadays you can't walk into a home or office without finding at least one Kenmore appliance and there's a pretty clear reason why. Kenmore builds quality products that last. When it comes to air purifiers, Kenmore doesn't have as large of a lineup as they once did, but with the few units they do have, you can rest assured you’re buying a quality built unit that's going to last for a long time. They may not be the most visually appealing units, but that's not what you're paying for, and to be honest, compared to other big name brands, you're going to be paying a lot less. Some of their top models include the 83156, 83157 and 83190. While the air purifier itself is a great purchase, their replacement filters leave more to be desired. Do yourself a favor and once the original filters are due for a change, don't spend the increased price buying OEM (original equipment manufacturer) filters, when Breathe Naturally filters are a higher quality, for a much lower price. Breathe Naturally MERV 17 HEPA filters stop harmful airborne particles down to 0.03 microns small at a 99.97% efficiency level. Capture mold spores, dust, dander, pollen, bacteria, virus carriers and tons more airborne particles, leaving the air you breathe clean and healthy. Our filters are perfect for those with seasonal allergies, sensitive respiratory systems and people who just want to Breathe Naturally. Breathe Naturally carbon filters are made from Bamboo carbon and are proudly made here in the USA, supporting American companies and jobs. We take pride in our specially designed carbon filters that are made to be thicker, last longer and capture more odors and particles that ultimately leads to a longer lifespan on your HEPA filters saving you money and leading to less waste. We recommend changing HEPA filters based on use, usually every 4-6 months for normal use, and every 1-2 months per carbon filter, again with normal use. Those who put extra strain on the air in their homes, such as larger families, people with pets and people who live in larger cities may want to change their filters more often. Most modern air purifiers come with a filter change indicator light that will let you know pretty accurately when you're due for a change. When changing your filters, dispose of dirty filters in the garbage. Reset filter indicator lights, and enable child lock if needed and available. Breathe Naturally firmly stands behind their filters and trusts them in their homes and the homes of their loved ones. We offer a 30 day money back guarantee on all purchases. Satisfaction guaranteed or your money back. Do not place the air purifier too close to your head, and refrain from having the air blow directly towards you. If you have any questions about Kenmore air purifiers and replacement filters or any other questions please don't hesitate to drop us an email or give us a call. All of our contact information can be found in the About Us/Contact us section of the website.