Case Study
How Airdog improved their conversion rate by 20% integrating Flex
Within the first two months of launching Flex, Airdog saw a 20% lift in overall conversion rates, directly addressing the sales barrier that had been limiting growth. In addition, Average Order Value (AOV) increased by 10%, as customers were able to invest in higher-end models. Payments through Flex ultimately made up 10-15% of Airdog’s revenue.
October 2, 2025
Paul Hughes
Account Manager at Flex
Overview
About the Brand
Overview
About the Brand
Overview
About the Brand
About the Brand
Airdog was founded in Silicon Valley by a team of PhDs and engineers with a shared mission: to bring clean, accessible air to every corner of the earth. The founders’ journey began while working on advanced airflow technology for Apple, which sparked an idea to tackle the global air pollution problem. By 2012, they launched Airdog’s first premium air purifiers, designed with a zero-waste philosophy and proprietary reusable filtration technology.
Today, Airdog serves customers who rely on clean air to maintain their health — from people living with respiratory illnesses and severe allergies to small businesses like dental clinics and food service providers. With a “buy it for life” approach, Airdog’s products are built to last, without costly filter subscriptions or excess waste.
The Challenge
Airdog’s premium products deliver life-changing results, but their high average order value (AOV) created a barrier for many customers. Even for those who saw the value, the upfront cost often made the purchase difficult to justify.
“Our conversion rate was low because people couldn’t stretch their budgets to buy a premium air purifier, even if it could improve their health,” said Harry Yu, Senior Brand & Partnerships Manager. “We needed an alternative payment option that matched our positioning and gave customers more ways to say yes.”
Airdog also noticed increasing customer inquiries about using HSA/FSA funds for their products — a strong signal that enabling these payments could directly improve accessibility.
Choosing Flex: More Than Just a Payment Processor
When evaluating solutions, Airdog considered other providers, including TrueMed, but Flex quickly emerged as the right choice. The difference came down to support, resources, and ease of implementation.
Flex provided a comprehensive onboarding process, including a pre-built implementation checklist, best-practice guides for creating an HSA/FSA page, and recommendations for ad creative. The Flex team also worked closely with Airdog to answer detailed questions and ensure the process was seamless from start to finish.
Integration was fast — the Flex payment option went live in under two days, and the full HSA/FSA collection page and related campaigns launched within a week and a half.
“TrueMed felt more DIY. Flex had a full onboarding framework and a team that made the process seamless,” Harry shared.
Results You Can Breathe In
The results were immediate and measurable. Within the first two months of launching Flex, Airdog saw a 20% lift in overall conversion rates, directly addressing the sales barrier that had been limiting growth. In addition, Average Order Value (AOV) increased by 10%, as customers were able to invest in higher-end models. Payments through Flex ultimately made up 10-15% of Airdog’s revenue.
The dedicated HSA/FSA collection page featuring Flex-authored FAQ content became a powerful SEO asset. In just six weeks, the page ranked in the top three organic search results for “HSA/FSA air purifiers,” driving sustained inbound traffic from high-intent shoppers. Bounce rates on the HSA/FSA collection page were also significantly lower compared to other product category pages, indicating stronger engagement from visitors who landed there.
Paid campaigns also benefited. Search and social ads incorporating HSA/FSA messaging outperformed non-HSA/FSA campaigns with a 37% higher AOV (and 4x ROAS). Flex’s “use it or lose it” seasonal framing proved especially effective during Black Friday.
Customer Response
The ability to accept HSA/FSA payments has led to powerful customer stories. One stands out for Harry: a family with a child suffering from a rare respiratory illness. They had been searching for a purifier capable of maintaining safe indoor air so their child could be homeschooled — but the upfront cost was prohibitive.
Once Airdog began accepting HSA/FSA payments through Flex, the family purchased the unit.
“They told us it changed their whole family’s life. They could do normal activities at home without constant fear of their child’s health deteriorating. That wouldn’t have been possible without HSA/FSA support,” said Harry.
These kinds of stories have reinforced Airdog’s belief that removing payment barriers is just as critical as engineering high-performance wellness products.
Looking Ahead
As Airdog expands its product line into other premium medical devices, HSA/FSA accessibility will remain a core part of its growth strategy. The brand plans to incorporate HSA/FSA messaging into all major campaigns, especially during peak retail periods when urgency is high.
“Flex aligns perfectly with our long-term vision. As our product line expands, HSA/FSA payments will continue to give customers more options and be an essential part of our growth,” Harry said.
For Airdog, partnering with Flex has been about more than just adding a payment method — it’s been about making health-supporting products accessible to more people, without compromising on quality.
“Absolutely, I’d recommend Flex,” Harry concluded. “It’s a user-friendly platform backed by an amazing, knowledgeable team. They make a complex process — both technically and financially — feel easy. And the results speak for themselves.”
Airdog
Airdog
Airdog
20%
Conversion Rate Lift
10%
Higher AOV
10-15%
of Sales with Flex
4x
Return on Ad Spend
About the Brand
Airdog was founded in Silicon Valley by a team of PhDs and engineers with a shared mission: to bring clean, accessible air to every corner of the earth. The founders’ journey began while working on advanced airflow technology for Apple, which sparked an idea to tackle the global air pollution problem. By 2012, they launched Airdog’s first premium air purifiers, designed with a zero-waste philosophy and proprietary reusable filtration technology.
Today, Airdog serves customers who rely on clean air to maintain their health — from people living with respiratory illnesses and severe allergies to small businesses like dental clinics and food service providers. With a “buy it for life” approach, Airdog’s products are built to last, without costly filter subscriptions or excess waste.
The Challenge
Airdog’s premium products deliver life-changing results, but their high average order value (AOV) created a barrier for many customers. Even for those who saw the value, the upfront cost often made the purchase difficult to justify.
“Our conversion rate was low because people couldn’t stretch their budgets to buy a premium air purifier, even if it could improve their health,” said Harry Yu, Senior Brand & Partnerships Manager. “We needed an alternative payment option that matched our positioning and gave customers more ways to say yes.”
Airdog also noticed increasing customer inquiries about using HSA/FSA funds for their products — a strong signal that enabling these payments could directly improve accessibility.
Choosing Flex: More Than Just a Payment Processor
When evaluating solutions, Airdog considered other providers, including TrueMed, but Flex quickly emerged as the right choice. The difference came down to support, resources, and ease of implementation.
Flex provided a comprehensive onboarding process, including a pre-built implementation checklist, best-practice guides for creating an HSA/FSA page, and recommendations for ad creative. The Flex team also worked closely with Airdog to answer detailed questions and ensure the process was seamless from start to finish.
Integration was fast — the Flex payment option went live in under two days, and the full HSA/FSA collection page and related campaigns launched within a week and a half.
“TrueMed felt more DIY. Flex had a full onboarding framework and a team that made the process seamless,” Harry shared.
Results You Can Breathe In
The results were immediate and measurable. Within the first two months of launching Flex, Airdog saw a 20% lift in overall conversion rates, directly addressing the sales barrier that had been limiting growth. In addition, Average Order Value (AOV) increased by 10%, as customers were able to invest in higher-end models. Payments through Flex ultimately made up 10-15% of Airdog’s revenue.
The dedicated HSA/FSA collection page featuring Flex-authored FAQ content became a powerful SEO asset. In just six weeks, the page ranked in the top three organic search results for “HSA/FSA air purifiers,” driving sustained inbound traffic from high-intent shoppers. Bounce rates on the HSA/FSA collection page were also significantly lower compared to other product category pages, indicating stronger engagement from visitors who landed there.
Paid campaigns also benefited. Search and social ads incorporating HSA/FSA messaging outperformed non-HSA/FSA campaigns with a 37% higher AOV (and 4x ROAS). Flex’s “use it or lose it” seasonal framing proved especially effective during Black Friday.
Customer Response
The ability to accept HSA/FSA payments has led to powerful customer stories. One stands out for Harry: a family with a child suffering from a rare respiratory illness. They had been searching for a purifier capable of maintaining safe indoor air so their child could be homeschooled — but the upfront cost was prohibitive.
Once Airdog began accepting HSA/FSA payments through Flex, the family purchased the unit.
“They told us it changed their whole family’s life. They could do normal activities at home without constant fear of their child’s health deteriorating. That wouldn’t have been possible without HSA/FSA support,” said Harry.
These kinds of stories have reinforced Airdog’s belief that removing payment barriers is just as critical as engineering high-performance wellness products.
Looking Ahead
As Airdog expands its product line into other premium medical devices, HSA/FSA accessibility will remain a core part of its growth strategy. The brand plans to incorporate HSA/FSA messaging into all major campaigns, especially during peak retail periods when urgency is high.
“Flex aligns perfectly with our long-term vision. As our product line expands, HSA/FSA payments will continue to give customers more options and be an essential part of our growth,” Harry said.
For Airdog, partnering with Flex has been about more than just adding a payment method — it’s been about making health-supporting products accessible to more people, without compromising on quality.
“Absolutely, I’d recommend Flex,” Harry concluded. “It’s a user-friendly platform backed by an amazing, knowledgeable team. They make a complex process — both technically and financially — feel easy. And the results speak for themselves.”
Airdog
20%
Conversion Rate Lift
10%
Higher AOV
10-15%
of Sales with Flex
4x
Return on Ad Spend
Flex is the easiest way for direct to consumer brands and retailers to accept HSA/FSA for their products. From fitness and nutrition, to sleep and mental health, Flex takes a holistic view of healthcare and enables consumers to use their pre-tax money to do the same.