ERMI and HERTSMI-2: What Dust Testing Can and Cannot Tell You in Florida
ERMI and HERTSMI-2 are the dust tests most CIRS-literate physicians reference. This guide explains what they measure, how to collect a sample that means something, how to read the scores, and the honest limitations nobody selling you a kit will mention.
What Florida changes about the picture
Humid subtropical to tropical; the highest sustained moisture load in the country. Concrete-block and stucco construction hides water paths at windows and penetrations; AC sizing and envelope detailing decide whether a Florida home stays dry.
Protocols are national; moisture is local. In Florida, the pressure a building lives under comes from specific, predictable directions — and this protocol should be read with those directions in mind, because they decide where the risk concentrates, which assemblies fail first, and what a defensible local scope looks like.
The FL moisture drivers to read this against
- Extreme ambient humidity most of the year
- Hurricane and tropical-storm water intrusion
- Oversized AC short-cycling without dehumidifying
- Stucco and window-installation envelope failures
What never changes — anywhere
What stays constant in Florida is the discipline: find the moisture, test honestly, correct the water before the growth, remediate under containment to the sensitized-occupant standard, and let an independent verifier — not the contractor — decide when it is done.
The full protocol below covers the national playbook in depth — read it alongside the FL context above.
Read the full protocol: ERMI and HERTSMI-2: What Dust Testing Can and Cannot Tell You →
- What these tests actually measure
- Why dust beats a single air sample
- Collection determines whether the result means anything
- Reading the numbers without panic
- The honest limitations
- When to retest
Florida questions
Does this protocol change in Florida?
The sequence never changes — locate moisture, test honestly, fix water before mold, remediate under containment, verify independently. What changes in Florida is where the moisture pressure comes from: extreme ambient humidity most of the year That determines where instruments go first and which assemblies earn suspicion.
What should Florida households check first?
Start with the failure modes this housing stock is known for. Concrete-block and stucco construction hides water paths at windows and penetrations; AC sizing and envelope detailing decide whether a Florida home stays dry. A moisture-focused assessment that ignores those patterns is guessing.
Can I get matched with a vetted provider in Florida?
Yes — matching runs in all 50 states, and Florida is one of our densest priority markets. Every provider is vetted on containment discipline, fine-particle competence, and willingness to be independently verified. Matching is free for households.
THIS PROTOCOL IN OTHER PRIORITY MARKETS → California · Colorado · Nevada · Texas
NEXT IN THE FL LIBRARY → The Mold Inspection, Done Right: A Homeowner's Field Manual in Florida