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My eyes and lungs are suffering today in upstate New York due to smoke from the Canadian wildfires. Many of you may be in the same fuzzy, coughing boat. A solid air purifier can help. Coway is running a buy-one-get-one promotion through July 24 that adds a free Airmega Aim, a $149.99 oscillating fan and purifier combo, to any of the six Airmega purifiers.

The Airmega Mighty AP-1512HH is the lowest-priced purifier that qualifies for the free Aim. Coway rates it for 1,748 square feet per hour and estimates the life of the filter set at about six months. Coway sells a beige version for the same price of $239.99 if black and white don’t fit the room, although it has slightly less power at 1,680 square feet per hour.

The Airmega Mighty2 costs $30 more than the Mighty and doubles the filtering interval, which is where the extra money really goes. Coway rates the filter set for up to 12 months instead of six, and puts the hourly coverage at 1,800 square feet. Replacement filter sets cost $69.99, so a longer interval matters more than it seems after a few years of ownership. The pre-filter now slides out from the side instead of coming out from the front, which is a small thing until you vacuum up pet hair every few weeks.

If you have a large open space, the Airmega 450 is the one I would buy in this promotion, and the reason is arithmetic. Coway rates it at 3,285 square feet per hour at $499, while the Airmega 400 covers 3,120 square feet and costs $649. The 450 is the newest design, requires a 12-month filter, and is the only Airmega here to offer a dedicated Intense Smoke+ filter, which sounds very appealing right now as I rub my eyes. The filters cost between $109 and $119, depending on which of the three you choose.

How the free Airmega Aim works

The Airmega Aim typically sells for $149.99 and you add it to cart for $0 from the qualified purifier product page instead of searching for a code. It’s a purifier and a fan at the same time, which is the useful part, since the fan is what makes it worth keeping outside during the summer instead of storing it in a closet. Coway rates it for 492 square feet in one hour and it oscillates in a range of 80 degrees while tilting up to 90 degrees vertically. Its filter works for about eight months and costs $29.99 to replace. It’s small enough for a desk or nightstand, so a bedroom, RV, or home office are the obvious places for it.

Coway Airmega BOGO Deals Under $300

Two Airmega purifiers break the free Aim threshold for under $300, and both are versions of the Mighty. The Airmega Mighty2 at $269.99 is the better long-term buy of the pair due to the 12-month filter, but the original Mighty at $239.99 lets you get the same purifier free for $30 less.

Coway Airmega BOGO Deals for Big Rooms

All of Coway’s larger Airmega purifiers qualify, and the difference between them comes down to Wi-Fi and coverage rather than filtration. The Airmega 250 and Airmega 250S are the same machine, rated at 1,860 square feet per hour, except the 250S adds app control and voice commands for $50 more.

Promotion ends July 24. If you just want one purifier and one free, the Airmega Mighty AP-1512HH at $239.99 gets you there for less money, and the Airmega 450 at $499 is the one to buy if the room is large and there’s a lot of smoke.

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