ERMI and HERTSMI-2: What Dust Testing Can and Cannot Tell You in New Hampshire
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 New Hampshire changes about the picture
Cold humid continental. Old stock plus modern weatherization creates condensation patterns; basements remain the moisture reservoir.
Protocols are national; moisture is local. In New Hampshire, 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 NH moisture drivers to read this against
- Ice damming
- Damp basements
- Winter condensation in tightened antiques
What never changes — anywhere
The sequence holds in New Hampshire exactly as it does everywhere else: locate the moisture, characterize the exposure with testing collected correctly, fix the water before touching the mold, remediate under verified containment, fine-clean, and verify independently. Every shortcut this industry sells is a reordering of that list.
The full protocol below covers the national playbook in depth — read it alongside the NH 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
New Hampshire questions
Does this protocol change in New Hampshire?
The sequence never changes — locate moisture, test honestly, fix water before mold, remediate under containment, verify independently. What changes in New Hampshire is where the moisture pressure comes from: ice damming That determines where instruments go first and which assemblies earn suspicion.
What should New Hampshire households check first?
Start with the failure modes this housing stock is known for. Old stock plus modern weatherization creates condensation patterns; basements remain the moisture reservoir. A moisture-focused assessment that ignores those patterns is guessing.
Can I get matched with a vetted provider in New Hampshire?
Yes — matching runs in all 50 states. 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 · Florida · Nevada · Texas
NEXT IN THE NH LIBRARY → The Mold Inspection, Done Right: A Homeowner's Field Manual in New Hampshire