Hydroxyl and carbon-media questions
Compare the purpose and evidence rather than a “safe” marketing label.
Follow the source of the smell.
- Log where and when odour returns.
- Ask what retained materials or hidden areas need assessment.
- Separate source treatment from masking and filtration.
- Compare the documented purpose of the actual equipment.
- Keep particle and gas-removal claims separate.
- Ask what source remains and how performance will be evaluated.
Ask what the equipment is meant to address
A proposal may involve reactive equipment, sorbent media or particle filtration. Identify the exact device, media and purpose. A particle rating does not establish gas removal, and a gas-treatment claim does not answer material or occupancy questions.
Ask for the relevant product performance information, limitations, maintenance and responsible expertise. This page does not certify hydroxyl equipment or recommend an operating setting.
Keep the source and room connected
Clarify whether an ongoing source remains, which retained material is involved and how the proposed equipment fits into the broader work scope. Equipment should have a stated purpose rather than being treated as a substitute for source assessment.
For media, ask what capacity and replacement information applies to the actual product and purpose. For reactive processes, ask how compatibility, access, relevant by-products and completion are established.
Compare proposals with the same questions
- Which contaminant/process purpose is documented?
- What evidence supports performance in this use?
- What materials and occupants are considered?
- What maintenance or replacement is required?
- Which result is checked and by whom?
Keep broad labels out of the handover
If a proposal says “safe,” “natural” or “eliminates all odour,” ask for the defined conditions and evidence. General indoor-air guidance and a manufacturer’s marketing description do not clear a fire-affected building. Retain the project-specific basis.
Compare two proposals without relying on the label
| Compare | Write down for each proposal |
|---|---|
| Purpose | Particle removal, a defined gas-removal purpose or a reactive treatment claim. |
| Equipment | Exact model and media/product information. |
| Evidence | Relevant performance information and its limits for this use. |
| Source work | Materials or conditions addressed before equipment is used. |
| Operation and controls | Responsible professional, access arrangements and maintenance plan. |
| Completion | Intended result, assessment method and remaining exclusions. |
A useful comparison shows whether the proposals are trying to solve the same problem. A lower price or a reassuring product name cannot answer a scope difference.
Ask what the media or equipment adds to source work
Health Canada places source reduction and suitable ventilation alongside air cleaning; most particle cleaners do not remove gases. Use that distinction to ask why a specific device belongs in the work plan. Do not read a particle rating as a measured gas-removal result.
For a carbon-media proposal, ask for the relevant product information and how maintenance or replacement is decided. For reactive equipment, ask for the stated compatibility and control basis. Keep the explanation tied to the actual property and documented purpose.
Take a useful brief
into the next conversation.
Organize your observations with a planning tool. Review the brief before choosing to share it.
Questions you may have
Does “safe for occupied spaces” settle the decision?
Ask for the exact device, intended use, relevant evidence and responsible professional’s assessment of the proposed conditions. A general marketing phrase does not establish a fire-affected property’s occupancy status.
Can I compare a carbon unit using its particle CADR?
Keep those performance questions separate. Particle CADR does not establish the gas-removal media’s capacity or result for the proposed purpose.
References and scope
- Improve indoor air quality in your home — Health Canada.
Source control, ventilation and limits of filtration/testing; ozone generators are not recommended in homes. - Using a portable air cleaner — Health Canada.
Household particle filtration and device selection; not a restoration containment design. - ANSI/IICRC S700: fire and smoke restoration — IICRC.
First edition2025; published scope only. Wildfire and exposure evaluation are not comprehensively addressed. The paid standard has not been reproduced.
Source links checked September 30, 2026. General guidance and original planning questions do not establish the condition, exposure risk or clearance of a property.
Smoke damage?
Start with a clear next step.
Describe what is known, where the property is and what you need help deciding. The HAUSE team reviews the request and, with your consent, may connect you with a suitable provider if available.
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