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By Sarah Bracy Penn

Fall is right around the corner, and though the thought of Pumpkin Spice Lattes, autumn carnivals and falling foliage excites us, it means something else is nearing, too. Yes, fall allergies are upon us.

This year, be prepared with a new humidifier or HEPA air purifier, which are on major sale today on Amazon. Pure Enrichment MistAire humidifiers are up to 63 percent off and PureZone HEPA purifiers are up to 40 percent off!

If you're unfamiliar, HEPA is the acronym for high-efficiency particle air, and room air cleaners with special HEPA filters are the best way to ensure your air is clean indoors. Considering air can be even less clean indoors than outdoors, air purifiers can really help bring relief. And, for people who suffer from dry sinuses, a humidifier can work wonders.

Keep scrolling to shop these Amazon deals before they expire, and be sure to read more about the benefits of buying a HEPA filter for your home on TODAY Health.

Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier, $30 (usually $80), Amazon

TODAY editors, writers and experts take care to recommend items we really like and hope you’ll enjoy! Just so you know, TODAY does have affiliate relationships. So, while every product is independently selected, if you buy something through our links, we may get a small share of the revenue.

With up to 16 hours of continuous operation, this little machine humidifies the air without warming up a space.

PureZone 3-in-1 True HEPA Air Purifier, $80 (usually $130), Amazon

Using a pre-filter, activated carbon filter and HEPA filter, this air purifier features an automatic timer and quietly filters germs and bacteria at three adjustable speeds.

PureZone Elite — Ultra-Quiet 4-in-1 True HEPA Air Purifier with Smart Air Quality Monitor, $120 (usually $200), Amazon

On top of a carbon filter, pre-filter and HEPA filter, this air purifier adds another layer of filtration with an ionizer. It's meant to both clean the air and eliminate odors at once.

MistAire XL Cool Mist Humidifier for Large Rooms, $40 (usually $65), Amazon

MistAire Silver Ultrasonic Cool Mist Humidifier, $30 (usually $50), Amazon

MistAire Studio Ultrasonic Cool Mist Humidifier for Small Rooms, $20 (usually $33), Amazon