Terms.
Last updated: May 2026.
1. Acceptance of these terms
These terms govern your use of lindenair.com and any products, services, or communications offered by Threadcraft Labs ("Threadcraft", "we", "our"). By using the site, you agree to these terms. If you don't agree, please don't use the site.
2. Who we are
Threadcraft Labs is a craft-forward smart-home product company based in Wisconsin, United States. You can reach us at joey@threadcraftlabs.com. Our parent site is threadcraftlabs.com; lindenair.com is the product site for Linden, our first product.
3. Use of the site
You may browse, read, and share lindenair.com freely. You may not scrape it at scale, attempt to interfere with its operation, or use it to send unsolicited communications. We reserve the right to restrict access if the site is being misused.
4. Communications and email list
If you sign up for product updates, we will email you with progress updates, certification milestones, and occasional product news. You can unsubscribe at any time using the link in any email.
We do not sell your email address or share it with third parties for marketing. See the Privacy Policy for full details on how we handle your information.
5. Warranty
Linden ships with a limited warranty per the Magnuson-Moss Warranty Act (15 U.S.C. § 2301 et seq.). The warranty covers defects in materials and workmanship under normal use. It does not cover:
- Normal wear, including HEPA filter replacement
- Accidental damage, including liquid damage, drops, or impacts
- Damage caused by misuse, modification, unauthorized repair, or use outside the documented operating environment
- Cosmetic wear that does not affect function
Full warranty terms — including the warranty period — will be included with your unit at delivery and posted on lindenair.com prior to first ship. Warranty service is provided by Threadcraft Labs in Wisconsin; international warranty service is not currently offered.
6. Repair and parts
Linden is designed for repairability. We commit to providing replacement filters, parts, tools, and service documentation for at least seven (7) years from the date of first sale, in compliance with right-to-repair frameworks including California SB 244 and the New York Digital Fair Repair Act. Specific parts pricing and availability will be published at lindenair.com.
7. Country of origin
Linden is designed and assembled in Wisconsin from U.S. and imported components. Threadcraft Labs does not claim "Made in USA" or "American made." The acceptable origin language used on this site is "Designed and assembled in Wisconsin."
8. Intellectual property
The lindenair.com site, photography, copy, brand identity, and software are owned by Threadcraft Labs. You may not reproduce them without permission. The Linden firmware contains open-source software including the Linux kernel and other GPL/LGPL components; we publish our build configuration and provide a written offer for source as required by those licenses. Source-offer details will be included in product documentation.
9. Disclaimers
Linden is a consumer-grade air quality monitor and HEPA air purifier. It is not a medical device. It does not diagnose, treat, prevent, or cure any disease or condition. Sensor readings are accurate within the tolerances published in the product specifications and are intended for awareness, not for professional or regulated air-quality measurement. Marketing language for Linden uses descriptive verbs (captures, removes, filters, monitors) and avoids curative claims, in compliance with FDA and EPA jurisdictional rules.
10. Limitation of liability
To the maximum extent permitted by law, Threadcraft Labs' liability for any product or service is limited to the amount you paid for the relevant product or service. We are not liable for indirect, incidental, consequential, or punitive damages. Some jurisdictions do not allow these limitations; in those cases, our liability is limited to the smallest amount permitted by applicable law. This section does not limit liability for fraud, willful misconduct, or other liability that cannot be excluded by law.
11. Governing law
These terms are governed by the laws of the State of Wisconsin, United States, without regard to conflict-of-law principles. Any dispute arising under these terms will be resolved in the state or federal courts located in Wisconsin, and you consent to the jurisdiction of those courts.
12. Changes to these terms
We may update these terms as our business evolves or as required by law. Material changes will be posted on this page with an updated date.
13. Contact
Questions about these terms: joey@threadcraftlabs.com.