Woosh
DealSmart Air Filters
Best known from its Shark Tank appearance, Woosh is a smart air filters in Season 14, and convinced Kevin O'Leary to invest.
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From the show
The Shark Tank pitch
- $500K
- Asked for
- 10%
- Offered equity
- $5M
- Sought valuation
- $500K
- Deal amount
- 10%
- Deal equity
- $5M
- Deal valuation
Winston Mok walked into the Tank in Season 14, Episode 4 in the episode that aired October 14, 2022. Woosh, the smart air filters, pitched in the Home & Lifestyle category, one of 260 home & lifestyle businesses to brave the Tank across all 17 seasons.
On the carpet, the number was $500,000 for a 10% stake, which valued the company at $5M.
Kevin O'Leary made the deal at $500,000 for 10% equity. The deal valued the company at $5M. The structure included a royalty component.
Woosh was one of 87 businesses to pitch in Season 14, where 62 deals got done. In the Home & Lifestyle category overall, roughly 68% of pitches have landed a shark across the show's history.
The full story
Everything to know about Woosh
Woosh is a reusable air filtration system for home HVAC units, built around a refillable frame and replaceable media rated up to MERV 13. Founder Winston Mok set out to fix a quiet household annoyance, the disposable furnace filter that people forget to change and that piles up as waste. Woosh pairs the filter with sensors and a mobile app that watches indoor air quality, nudges you when the media is spent, and can reorder refills so the system keeps running without guesswork.
Mok came to the Season 14 tank asking for 500,000 dollars in exchange for 10 percent, pitching the subscription angle and the recurring revenue behind the refills. Kevin O'Leary liked the razor-and-blade economics and made an offer at the same headline numbers, adding a per-unit royalty that would pay him back over time. Mok accepted on air, giving the company a televised win and O'Leary a stake in a connected-home product.
What made Woosh memorable was its framing of a boring chore as a smart-home category. Rather than selling a one-time gadget, it tied a physical filter to software, air-quality alerts, and automatic resupply. That combination of hardware, data, and a built-in reorder loop is what caught O'Leary's attention and what set the brand apart from the stack of cheap disposable filters most shoppers buy on autopilot.
Where Woosh is now
The handshake with O'Leary did not survive due diligence, and the televised deal ultimately did not close, a common outcome after the cameras stop. Even so, the exposure helped Woosh keep raising money and building partnerships rather than fading out. Reporting points to a venture funding round in 2023 and later collaborations with established names in filtration and smart thermostats, signs the company kept pushing the connected-air concept forward instead of standing still.
As of 2026 Woosh is still operating and selling directly through its own website. The lineup has broadened beyond the original smart filter to include a standalone air-quality monitor and additional filter formats, with both MERV 8 and MERV 13 refill options. The brand continues to lean on its subscription model, where the filter frame is the entry point and the recurring refills are the long-term business.
Where to buy Woosh
Woosh sells through its official site, wooshair.com, rather than Amazon. A basic refillable filter kit starts around 40 dollars, the smart sensor module runs near 99 dollars, refills are roughly 22 dollars, and the air-quality monitor is about 99 dollars. The site offers free shipping and a 30-day trial. It is a reasonable buy if you want fewer disposable filters and app-based reminders, though plain replacement filters remain cheaper if you do not need the smart features.
Is Woosh still in business?
Read our 2026 update on where the company is now.
Sold on Woosh?
Check today's price and availability before it swims away.
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Frequently asked questions
Where can I buy Woosh?
Check current price and availability on Amazon. Note that some Shark Tank products are discontinued or sold under a new name. The company's official website is another option.
Did Woosh get a deal on Shark Tank?
Yes. Woosh closed a deal for $500,000 in exchange for 10% equity, with Kevin O'Leary.
Which shark invested in Woosh?
Kevin O'Leary invested in Woosh ($500,000 total as aired).
What season of Shark Tank was Woosh on?
Woosh appeared in Season 14, Episode 4, which aired October 14, 2022.
How much was Woosh asking for on Shark Tank?
The founders asked for $500,000 for 10% of the company, a $5M valuation.
Did Woosh close its Shark Tank deal with Kevin O'Leary?
No. O'Leary made an offer on air that Winston Mok accepted, but the deal did not close after the show, reportedly due to disagreements during due diligence. The company continued operating and raising money independently afterward.
Is Woosh still in business in 2026?
Yes. Woosh is still operating and selling through wooshair.com. Its product range has grown to include the smart filter, refill media, and a separate air-quality monitor.
What does the Woosh air filter actually do?
It is a refillable HVAC filter with sensors and an app. The system monitors indoor air quality, tracks when the filter media is used up, and can automatically reorder refills, with media rated up to MERV 13.
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