Air Purifiers on Sale

This two-pack of Blueair Blue Signature Mini air purifiers is $20 off the regular $99.99 price at Costco. Each unit covers up to 610 sq. ft. and uses 4-stage HEPASilent filtration that removes 99.97% of airborne particles down to 0.1 microns, with operation as quiet as 20 decibels. This deal ends November 15. Buy Now at Costco

The Dreo Air Purifier 338 hits its Amazon all-time low of $60 and is 33% off. It carries AHAM Verified performance testing and ENERGY STAR certification. Three aroma pads are included for the built-in scent diffuser. Shipping is free. Buy Now at Amazon

This 16-in-1 air quality monitor is $23 off, dropping to $77 from its regular $100 price at Amazon. It's the best price Amazon has charged for this model. It tracks CO2, PM2.5, PM10, HCHO, TVOC, temperature, and humidity on a single 7" display, with a built-in buzzer that alerts you when readings exceed set thresholds. Buy Now at Amazon

Update: The price has dropped to $59.99 since this was originally published.

At Amazon, get this Lecoolife 10-in-1 Indoor Air Quality Monitor for $66. It's the best price Amazon has charged for this model. It tracks ten indoor readings at once, including PM1.0, PM2.5, PM10, HCHO, and TVOC levels, along with temperature and humidity, displayed on a large color screen with real-time AQI alerts. Buy Now at Amazon

Your HVAC system needs a filter change every 60-90 days anyway, so grabbing this 4-pack covers you for the better part of a year while catching the finer particles a basic filter lets through. Good fit for households dealing with pet dander or seasonal allergies who want better filtration without stepping up to a HEPA-level price tag. Buy Now at Home Depot

Pet owners dealing with dander and lingering odors will get the most use out of this one, especially in smaller rooms where air quality matters most. At $159.99, that's $40 off the $199.99 list price. Buy Now at Amazon

Swapping filters every month gets tedious, so having five MERV 11 filters on hand at once covers you for the better part of a year without reordering. Buy Now at Home Depot

Dust, pollen, and pet dander sufferers get the most out of this one, since the UltraHEPA filter is rated to capture particles far smaller than standard HEPA units catch, and right now it's $40 off the $469 list price. Buy Now at Amazon

Worth stocking up on if your system takes this oversized 17"x21"x4" filter, since MERV 11 traps finer dust and allergens than standard filters without choking off airflow in most residential setups. The 3-pack covers a filter change every few months, so you're not restocking constantly. Buy Now at Home Depot

This odd-size filter is worth checking against your unit's actual dimensions before you buy, since 16.25" x 21" isn't a standard cut and can be tough to find locally. MERV 8 handles everyday dust and pollen without restricting airflow, making it a reasonable pick for routine home filtration rather than allergy-heavy needs. Buy Now at Home Depot

Swapping filters every 90 days gets easier when you've got a 2-pack on hand, and the MERV 11 rating catches dust, pollen, and pet dander without choking airflow the way higher ratings can. Good fit for allergy-prone households that still want decent furnace or AC efficiency. Buy Now at Home Depot

Anyone dealing with allergies or pet dander benefits from the HEPA filtration here, and the WiFi connectivity lets you control it remotely or set schedules from your phone. It's $35 off the $130 list price, putting it at $95. Buy Now at Amazon

Swap this in if you want a middle-ground filter that catches more allergens and dust than a basic MERV 8 without choking airflow like the higher-MERV options can, and the 4-pack means you're set for a year without reordering. Buy Now at Home Depot

Worth stocking up on if your HVAC system takes this size, since MERV 11 traps smaller particles like pet dander and pollen without restricting airflow the way higher-rated filters can, and having four on hand means you're set for a year of regular swaps. Buy Now at Home Depot

These bags work well for closets, shoes, or small rooms where you want to cut odor without chemicals or electricity, since the charcoal just needs occasional sun exposure to recharge. At $19.18, that's $4.80 (20%) off the $23.98 list price. Buy Now at Amazon

Keeping a consistent filter change schedule gets easier with a 5-pack on hand, and MERV 11 is a solid middle ground for catching dust, pollen, and pet dander without straining your HVAC system like denser filters can. Buy Now at Home Depot

Dust, pet dander, and allergens in a small room are what this one's built to handle, and it's a budget-friendly pick for a bedroom or home office at $23.36, which is $2.60 off the list price. Buy Now at Amazon

Handy for allergy sufferers or anyone wanting cleaner air in a bedroom or home office without constant filter guesswork, since it tracks air quality in real time. Amazon has it for $88, which is $42 off the $130 list price. Buy Now at Amazon

Dealing with allergies or pet dander in a single room gets easier with a 3-stage HEPA filter that actually captures the particles making you sneeze, and right now it's $29 off the list price. Buy Now at Amazon