Home environmental health, explained

Plain-language guides on indoor air quality, mold, environmental testing, and using HSA/FSA funds for medically necessary care. Written to be useful, accurate, and free of hype.

• HSA / FSA guide · 2026-05-31 · 6 min read

  What is a Letter of Medical Necessity (LMN)?

  A plain-language guide to Letters of Medical Necessity (LMNs): what they are, what they typically include, and how patients use them with HSA/FSA accounts.

• How it works · 2026-05-31 · 7 min read

  What Does a Certified Environmental Home Inspection Involve?

  A walkthrough of what happens during a certified environmental home inspection — from intake to sampling to the lab report — and what credentials to look for.

• Patient guide · 2026-05-31 · 6 min read

  Signs You May Want a Mold or Air-Quality Inspection

  Common, non-alarmist signs that a home mold or indoor air-quality inspection might be worth considering — and what testing can and cannot tell you.

• Patient guide · 2026-05-31 · 7 min read

  Indoor Air Quality 101 for Renters and Homeowners

  A practical introduction to indoor air quality: the common pollutants, why ventilation and humidity matter, and simple, low-cost steps renters and homeowners can take.

• How it works · 2026-05-31 · 6 min read

  How the Canary Process Works (Patient to Inspector to Results)

  A step-by-step look at how Canary connects patients with certified environmental inspectors and, when appropriate, telehealth Letters of Medical Necessity — from booking to lab results.

• HSA / FSA guide · 2026-05-31 · 7 min read

  Can You Use HSA/FSA for Home Environmental Testing?

  A general guide to whether HSA and FSA funds may be used for home environmental testing like mold, lead, and air-quality assessments — and the documentation administrators often ask for.

Each post is reviewed by Canary's clinical advisory board before it ships and re-reviewed periodically.