By Hathaspace – Manufactured under the strictest quality standards by Hathaspace for the Smart True HEPA Air Purifier HSP001. For your safety, choose only Hathaspace replacement filters for your Hathaspace air purifiers. 4 filter stages – H13 True HEPA, HEPA Pre-Filter, Cold Catalyst, and Activated Carbon filter stages capture over 99.9% of dust, pollen, allergens, smoke, odors, pet hair, and particles down to 0.1 microns. Easy installation & maintenance - Simple to install, have your filters replaced in just a few seconds. For the cleanest air year-round, we recommend replacing your filters every 4 months. Improved carbon filter – Our activated carbon filter features more carbon than other carbon filters on the market. Designed for greater surface area absorption, our unique honey-comb carbon filter can absorb more odors, gases, and smoke and last much longer. Lifetime support – The Hathaspace team is always available to assist you. If you have any problems with your filters, just let us know and we will replace them. For the cleanest air year-round, we recommend replacing your filters at least every 4 months. Certified Hathaspace Smart True HEPA Air Purifier HSP001 Replacement HEPA Filter Set Designed specifically for the Hathaspace HSP001 Air Purifier, these replacements filters will maintain the cleanest and most pure indoor air environment. Best Practices To extend the filter life, lightly brush filters and expose them to direct sunlight periodically. When Should I Replace My Filters? Replace every six months, or as needed. If you need any help, feel free to reach out to the Hathaspace team. Package Contents 1 True HEPA + Pre-Filter and 1 Cold Catalyst + Activated Carbon Filter Replacement Instructions Power off air purifier, unplug, and remove the front cover. Turn the buckles sideways and remove both old filters. Unwrap the new air filters before installing. Place filter 2 (True HEPA + Pre-Filter) in the housing first. Make sure the pull tab is facing you. Place filter 1 (Cold Catalyst + Activated Carbon) in the housing next. Make sure the pull tab is facing you. Turn the buckles sideways to lock filters in. Install the front panel by placing the top into the host buckle first, and then closing the front panel.