Privacy policy

FilterFlow Privacy Policy — Last updated: 09/16/2026

FilterFlow ("FilterFlow," "we," "us," or "our"), operated by Filterflow LLC, provides subscription delivery of replacement air filters and related installation-reminder notifications. This Privacy Policy explains what information we collect, how we use and share it, and the choices you have.

Information we collect

  • Account & order information: name, email address, billing and shipping address, phone number, and order history.
  • Contact (recipient) information: when a customer enrolls a property, we collect the name, mobile phone number, and email address of the person to be notified when a filter needs installing.
  • Payment information: processed by our payment provider (Shopify Payments / third-party processors). We do not store full card numbers.
  • Usage, device, and interaction data: IP address, browser and device type, pages viewed, products viewed or added to cart, referring site, and similar information collected automatically through cookies, pixels, and similar technologies when you use our website (see "Cookies and advertising technologies").
  • Communications: messages you send us by email, phone, or the contact form, and records of reminder texts and delivery status.

How we use information

  • To process and deliver orders and subscriptions.
  • To send transactional service messages, including filter-installation reminders by SMS and email (see our SMS Terms).
  • To provide customer support and account management.
  • To operate, analyze, and improve our website and services.
  • To advertise and measure advertising: to show you ads for FilterFlow on other websites and apps, to measure whether our ads lead to visits and purchases, and to reach people similar to our customers, as described below.
  • To detect, prevent, and address fraud, abuse, or technical issues.
  • To comply with legal obligations.

Cookies and advertising technologies

We and our partners use cookies, pixels, tags, SDKs, and similar technologies on our website and in our checkout. These fall into three groups:

  • Essential: required for the store to work (cart, checkout, security, fraud prevention). Provided mainly by Shopify.
  • Analytics: help us understand how the site is used (for example Shopify analytics and Google Analytics).
  • Advertising: let advertising platforms recognize your browser or device, show you our ads on other sites and apps, limit how often you see them, and measure results. We use advertising platforms and their tools, which may include Google (Google Ads, Google Analytics, and the Google tag, including conversion tracking, remarketing, and enhanced conversions), Meta (Facebook and Instagram), Microsoft Advertising, TikTok, Pinterest, and others we may add over time. These platforms may set their own cookies and collect information about your activity on our site and other sites, which they use under their own privacy policies.

Conversion measurement and audience matching. To measure our advertising and reach relevant audiences, we may share certain customer information with advertising platforms in hashed (pseudonymized) form — such as your email address, name, and address — through features like Google Enhanced Conversions, Meta Advanced Matching, and customer-list matching. The platform matches this against its own users and does not receive it in readable form. We do not include phone numbers in information shared for advertising. We may also use Shopify features that share customer data with these platforms on our behalf.

How we share information

  • Service providers who help us operate, bound to use information only to provide their service: Shopify (storefront, checkout, payments, customer accounts, and analytics), Twilio (text messaging), Microsoft Azure (hosting and email delivery), our shipping and fulfillment providers, and customer-support tools.
  • Advertising and analytics partners, as described above. Sharing information with advertising platforms to show you targeted ads on other sites may be considered a "sale," "sharing," or "targeted advertising" under some U.S. state privacy laws. You can opt out — see "Your choices and rights."
  • Legal and safety: when required by law, subpoena, or legal process, or to protect our rights, customers, or others.
  • Business transfers: in connection with a merger, acquisition, financing, or sale of assets, subject to this policy.

SMS / text messaging

We use phone numbers provided to us to send transactional installation-reminder text messages through our messaging provider (Twilio). SMS opt-in consent and mobile phone numbers — yours and your contacts' — are not shared with, sold to, or used by any third parties or affiliates for marketing or advertising purposes. Message frequency varies by subscription. Message and data rates may apply. Reply STOP to opt out or HELP for help. Full terms are in our SMS Terms.

Your choices and rights

  • Opt out of targeted advertising / "sale" or "sharing": use the Your Privacy Choices link in our website footer, or send a Global Privacy Control (GPC) signal from your browser — we honor GPC where required. You can also manage cookie preferences through the banner shown on our site (where offered in your region) and your browser settings.
  • Platform opt-outs: Google Ads Settings (adssettings.google.com), Meta ad preferences, Microsoft ad settings, and the industry tools at optout.aboutads.info (DAA) and optout.networkadvertising.org (NAI). Opting out stops personalized ads from that platform but not all ads.
  • Opt out of SMS at any time by replying STOP.
  • Email: unsubscribe using the link in any marketing email; service emails about your orders and reminders continue while you have an active subscription.
  • Access, correct, or delete your information by emailing support@filter-flow.com.

U.S. state privacy rights

Depending on where you live (including California, Colorado, Connecticut, Minnesota, Oregon, Texas, Virginia, and other states with consumer privacy laws), you may have the right to: know what personal information we collect, use, and share; access a copy of it; correct it; delete it; opt out of targeted advertising, the sale or sharing of personal information, and certain profiling; and not be discriminated against for exercising these rights. To exercise them, use the Your Privacy Choices link or email support@filter-flow.com. We may ask you to verify your identity; an authorized agent may act for you with your written permission. We respond within the time required by law (generally 45 days). If we deny a request, you may appeal by replying to our response; we'll explain the outcome. We do not knowingly sell or share the personal information of anyone under 16. In the past 12 months we have collected the categories of information listed above, and have shared identifiers and internet activity with advertising partners as described.

Data retention

We retain information for as long as needed to provide the service, comply with legal obligations, resolve disputes, and enforce our agreements. Advertising and analytics data is retained according to each platform's settings, which we configure to the shortest period practical.

Children

Our service is not directed to children under 16, and we do not knowingly collect their data.

Security

We use reasonable administrative, technical, and physical safeguards to protect information. No method of transmission or storage is 100% secure.

Changes

We may update this policy and will revise the "Last updated" date above.

Contact

Filterflow LLC — support@filter-flow.com — 1250 Wayzata Blvd E, Unit #1869, Wayzata, MN 55391