[Pre-sale] AirDoctor 4000 • 1 Year 3-in-1 Filter Combo Pack

*The new AirDoctor 4000 is now available on pre-sale at a special introductory price for a limited time. Shipping is expected to begin in mid-November. Your next two filter changes, ready when you need them. The AirDoctor 4000 1 Year 3-in-1 Filter Combo Pack gives you 2 genuine replacement filters at a discounted bundle price, so you can plan ahead and pay less than you would buying each one separately. Every filter contains the complete 3-stage filtration system. The Pre-Filter captures larger particles such as dust and pet hair. The Premium Carbon/Gas Trap/VOC layer helps reduce gases, odours and VOCs, while the independently tested UltraHEPA® filter captures 99.99% of airborne particles as small as 0.003 microns. Replacement is recommended approximately every six months, so the two filters provide around one year of replacement filtration. Actual filter life can vary depending on how often your purifier runs and the air quality in your home. There are no separate filtration stages to buy or change individually. When the filter indicator shows that a replacement is due, simply swap out the complete 3-in-1 filter. An easier way to stay prepared, with better value built into the pack.