Coway air purifiers are among the best bang for your buck air purifiers on the market. The AP-1512HH, Airmega 300 & 400, are the most popular units and provide great value and filtering power for the price. They are simple to set up and use air purifiers that are slowly becoming smart machines that can automatically adjust to the air in your home as it changes throughout the day, with each iteration of the unit. They have units for all different shapes and sizes of rooms, from small desktop machines to larger whole home units. Pairing these value brand units with Breathe Naturally replacement filters makes for an excellent air purification system that doesn't break the bank. 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. Our carbon filters are proudly made in the USA. All filters ship from Minnesota, a family owned and operated company. 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 Coway 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.