AES Position Statements

Where we stand.

AMOLDBUSTER — Apollo Environmental Solutions by WeSpiritus — is regularly asked to take a stand on the most pressing questions in indoor environmental health. These are the positions we hold, the reasoning behind them, and the science that supports each one.

Read Our Positions Call (240) 347-1142

Written & reviewed by W. David Winstead, NORMI Certified Microbial Inspector · HBIA Certified Microbial Biotoxin Assessor · IICRC Affiliated · 22+ years · Last updated August 2026

These position statements exist for one reason: clients, physicians, and attorneys regularly ask us where AES stands on the most common questions in indoor environmental health — and they deserve a clear, science-grounded answer in plain English.

Every position below is one we have arrived at through two decades of field work, lab partnerships, ongoing certification, and direct collaboration with the functional medicine, CIRS, and building science communities. None of these positions are casual. None of them are marketing copy. They reflect what we actually believe and practice every day.

If you have a question we haven't addressed below, write or call us — new positions are added as new questions become common.

Our Positions

Thirteen positions we hold — and defend

Click any title below to jump to the full position. Each one follows the same structure: the common question, our position, and the science behind it.

01Damp Buildings & The Mold Question 02HERTSMI-2 & Proper CIRS Testing 03HVAC System Contamination 04What Real IAQ Testing Looks For 05Bleach & DIY Mold Cleanup 06Air Purifiers, Ozone & DBI Technology 07Green Products, Paints & Coatings 08Water Filtration & Quality Testing 09CIRS, MCAS & Environmental Illness 10Indoor Humidity & RH Targets 11Crawlspace Ventilation — Vent or Seal? 12Mold in Vehicles & the Daily Commute 13Why We Don't Do Remediation

Position 01 · Foundation

Damp Buildings & The Mold Question

Common Question

"Does my home have a mold problem?"

Our Position

If you have a moisture problem, you have a mold problem. The two cannot be separated. Visible mold is the symptom; moisture is the cause. Testing without identifying the moisture source is wasted money.

Why We Hold This Position

We have inspected thousands of buildings over 22 years. We have not encountered a single significant mold problem that did not begin with a moisture event — a leak, a flood, condensation, vapor diffusion, ground-water intrusion, or HVAC dehumidification failure. Mold cannot grow without moisture. Period.

Cleaning visible mold without fixing the moisture source guarantees the problem returns — usually within months, sometimes within weeks. That's why every assessment we perform begins with moisture forensics, not just sample collection. We ask: where is the water coming from, where is it going, and how long has it been there? Until those questions are answered, no remediation plan can succeed.

Position 02 · CIRS Testing

HERTSMI-2 & Proper CIRS Testing

Common Question

"My doctor is treating me for CIRS. What testing do I need on my home?"

Our Position

For CIRS patients, we recommend HERTSMI-2 dust testing as the primary screening tool, following the Shoemaker Protocol. HERTSMI-2 evaluates 5 specific water-damage-indicator species and produces a numerical score your physician can use clinically.

Why We Hold This Position

HERTSMI-2 — Health Effects Roster of Type-Specific Formers of Mycotoxins and Inflammagens, 2nd Edition — was developed specifically to evaluate whether a building is safe for occupancy by a CIRS patient. It tests for five species directly linked to water damage and CIRS triggers:

• Aspergillus penicillioides — common water-damage indicator, produces mycotoxins
• Aspergillus versicolor — chronic-damp-building indicator, sterigmatocystin producer
• Chaetomium globosum — significant water damage indicator, neurotoxic potential
• Stachybotrys chartarum — "black mold," chronic severe water damage
• Wallemia sebi — humidity-only indicator (grows without active leaks). Why its score threshold hides real exposure →

HERTSMI-2 produces a numerical score. A score above 11 indicates a building likely problematic for a CIRS patient. A score of 10 or below indicates a building generally safe for re-entry. Generic mold inspections do not produce this score, do not use the right collection method, and do not produce results your CIRS-literate physician can chart and act on.

Position 03 · HVAC

HVAC System Contamination

Common Question

"Should I have my HVAC system tested or cleaned?"

Our Position

99% of the projects we investigate involve some level of HVAC contamination — and yet HVAC is the single most overlooked system in standard home inspections. If you have an indoor air quality problem, the HVAC is implicated until proven otherwise.

Why We Hold This Position

The HVAC system is the lung of your building. It pulls air from every room through the return system, runs it across the cooling coil (which is wet during every air-conditioning cycle), passes it through the air handler, and pushes it back through the ductwork into every room. Any contamination — biological, chemical, or particulate — gets distributed throughout the entire building, every cycle, every day.

Common sources of HVAC contamination we find on nearly every project:

• Biological growth on the coil — the coil stays wet during cooling. Microbial film develops within months.
• Standing water in the drain pan — if the drain line clogs, the pan becomes a reservoir for bacterial growth.
• Contamination on the blower wheel — rarely cleaned, and it touches every cubic foot of air the system moves.
• Duct contamination — dust, debris, and biological matter accumulate; flex duct interiors are particularly hard to clean.
• Return-side leaks — if your return system pulls air from a crawlspace, attic, or wall cavity, you're breathing what's in those spaces.

Most home inspections never open the air handler, never inspect the coil, never look inside the supply trunk. Our forensic HVAC investigation is one of the most consistent sources of "missed" problems we find on properties that already passed conventional inspections.

Position 04 · What to Test For

What Real IAQ Testing Looks For

Common Question

"When you test indoor air quality, what are you actually looking for?"

Our Position

A serious indoor air quality assessment looks at six categories of contaminants — not just "mold." A test that only screens for fungal species misses 5 of 6 categories.

Why We Hold This Position

The biological and chemical load inside a building is far more complex than a single contaminant. A complete IAQ workup — the kind that produces actionable results for sensitized patients and clinicians — addresses all six of these categories:

• Fungal species — the visible problem. Identification by genus and species matters; not all molds carry the same health risk, and HERTSMI-2 specifically targets five indicator species.
• Actinobacteria — thermophilic, filamentous bacteria that flourish in water-damaged buildings alongside mold. Increasingly recognized as an independent CIRS trigger. Routinely missed by mold-only inspections.
• Endotoxins — fragments of Gram-negative bacterial cell walls. Cause inflammatory response even when the bacteria themselves are dead. Linked to asthma, COPD exacerbations, and chronic inflammation.
• Formaldehyde — off-gases from particleboard, MDF, engineered wood, fabrics, fresh paint, and cleaning products. A WHO Group 1 carcinogen and a potent irritant for MCAS bodies.
• TVOC — Total Volatile Organic Compounds — the broad chemical load from building materials, cleaning products, fragrances, furniture, and finishes. We measure TVOC because we need to know the cumulative chemical burden, not just one indicator chemical.
• MVOC — Mold Volatile Organic Compounds — the chemical "smell" produced by active mold growth. MVOCs detect hidden mold long before it's visible. If your inspector doesn't test for MVOC, they're missing the colonies behind the drywall.

A "mold inspection" that only tests for fungi is the home inspection equivalent of a blood panel that only measures one marker. We test all six categories because that's what the science requires — and what your physician actually needs to make treatment decisions. See which laboratory runs each of these analyses →

Position 05 · DIY Cleanup

Bleach & DIY Mold Cleanup

Common Question

"Can I just clean mold with bleach?"

Our Position

No. Bleach kills surface mold but does not address the moisture problem, the spore load, or the mycotoxins. It is a cosmetic fix to a structural problem.

Why We Hold This Position

Household bleach is roughly 94% water and 6% sodium hypochlorite. On non-porous surfaces (tile, glass, sealed countertops), it effectively kills surface mold. On porous materials — drywall, wood, drywall paper, fiberglass insulation, carpet padding — it fails on multiple levels:

• The water penetrates deeper than the chlorine. Moisture sinks into the material, feeding the mold colony below the surface while the active chlorine evaporates from the surface.
• Mycotoxins persist regardless. Even if every spore is killed, mycotoxins remain biologically active. They continue to trigger inflammatory response in sensitized people.
• Regrowth is common within weeks. Because the moisture source is unaddressed, the colony returns — often more aggressively, sometimes with different species.
• The EPA does not recommend bleach for porous materials. See EPA's "Mold Remediation in Schools and Commercial Buildings" guidance document.

For visible surface mold on a hard, non-porous surface, soap and water are often as effective as bleach — with far less respiratory irritation. For anything on a porous material, the material must be removed and replaced after the moisture source is corrected. There is no chemical shortcut.

Position 06 · Air Purification

Air Purifiers, Ozone & DBI Technology

Common Question

"Will an air purifier or ozone generator solve my mold problem?"

Our Position

No technology — air purifier, ozone generator, ionizer, UV light, or DBI — solves a mold problem at its source. But the right technology, used appropriately, can be a valuable aid alongside or after source remediation. We are believers in well-designed air purification as part of the recovery plan, not as a replacement for fixing the underlying problem.

Why We Hold This Position

Source remediation and air purification are two different jobs. Source remediation removes the actual contamination from the building — the wet drywall, the contaminated insulation, the colonized HVAC components. Air purification helps manage the particulate, VOC, and pathogen levels in the air going forward. These functions are complementary, not interchangeable.

Using a purifier in place of source remediation is like taking painkillers without setting a broken bone — it makes you feel better temporarily without addressing the underlying problem. However, after a building has been properly remediated, the right air purification technology can be a meaningful tool for maintaining the gains, managing seasonal allergens, and providing an extra layer of protection for environmentally sensitized occupants.

Technologies we have seen produce real benefit when used as adjuncts include:

• True HEPA filtration — the proven workhorse. Captures 99.97% of particles 0.3 microns and larger, including mold spores and most allergens.
• Activated carbon filtration — addresses VOCs, formaldehyde, and odors that HEPA alone cannot capture.
• UV-C light in HVAC — properly installed UV-C at the coil can reduce biological growth on a wet coil. Installation specifications matter; not every UV-C product is equal.
• Bi-polar ionization & DBI (Dielectric Barrier Ionization) systems — advanced ionization technologies that, when properly designed and certified, can reduce airborne pathogens and particulates. Quality varies dramatically across the market; we encourage clients to insist on independent third-party testing data before purchasing any ionization system.
• PCO (Photocatalytic Oxidation) — useful in certain applications, but byproduct chemistry matters; we look at the full emissions profile, not just the marketing claims.

A specific note on ozone: ozone is a respiratory irritant and should never be operated in occupied spaces. Industrial ozone treatment in unoccupied spaces by trained operators has legitimate applications. Consumer "ozone-generating air purifiers" sold for use in occupied living spaces are a different category — one that the EPA and the American Lung Association both caution against.

We are happy to discuss specific products and technologies with our clients during consultation. Because we sell no products ourselves and have no financial relationship with manufacturers, our recommendations are based only on what we've seen perform in the field over 22 years.

Position 07 · Building Materials

Green Products, Paints & Coatings

Common Question

"Are 'green' or 'low-VOC' products safe for sensitive people?"

Our Position

"Green" and "low-VOC" are marketing terms, not medical clearances. Real-world emissions testing matters more than what's printed on the can.

Why We Hold This Position

The term "low-VOC" refers only to a regulated subset of volatile organic compounds — the ones EPA targets for smog reduction. Many compounds that affect human health are not on that regulated list. Many products labeled "green," "natural," or "eco-friendly" still emit chemicals that are not regulated as VOCs but absolutely trigger reactions in sensitized people.

Real-world emissions from any product vary by:

• Manufacturer and batch — formulations differ; not all "low-VOC" paints from the same brand have the same emissions profile.
• Temperature and humidity — warmer and more humid conditions accelerate off-gassing dramatically.
• Cure time — the first 30 days after installation are the highest-emission window. "Safe to occupy" claims often assume 30+ days of off-gassing in unoccupied conditions.
• Surface area and ventilation — a small closet with new MDF shelving and no airflow is a very different environment than the same shelving in a well-ventilated room.

For MCAS patients, "low-VOC" can still mean "high enough to trigger a reaction." For new construction or renovation involving a sensitized occupant, we don't trust the label — we test what's in the air, in the actual room, at the actual temperature, where the actual person will be living.

Position 08 · Water Quality

Water Filtration & Quality Testing

Common Question

"Is my tap water safe? Do I need a filter?"

Our Position

Test before you filter. Water filtration sold without testing is sold on marketing, not on your specific water profile. And if you're on a private well, no government agency is checking it for you.

Why We Hold This Position

Public water utilities in the United States are regulated under the Safe Drinking Water Act and routinely tested by the EPA. That testing is good but not exhaustive — standards address acute toxicity at population scale, not the lower-level contaminants that affect environmentally sensitized individuals over years of exposure. PFAS, microplastics, pharmaceutical residue, hormones, and emerging contaminants are largely unregulated in drinking water.

Private well water is not regulated by the EPA at all. Testing is the homeowner's responsibility. Many homeowners with wells never test, or only test at closing when buying the property.

Filtration claims (heavy metals, chlorine, fluoride, PFAS, hormones, etc.) vary widely between systems and are rarely independently verified. Buying a system without knowing what you actually need to filter is paying for insurance against unknown threats. Our recommendation, in this order:

• Test first. Find out what's actually in your water.
• Then choose filtration matched to your specific contaminants.
• Re-test after installation to verify the system is working.
• Re-test annually thereafter — filters degrade, source water changes.

Position 09 · Environmental Illness

CIRS, MCAS & Environmental Illness

Common Question

"Do environmentally sensitive people really need different testing?"

Our Position

Yes — categorically. Generic mold inspections are not designed around environmental illness. CIRS and MCAS patients need protocols formatted for their physicians, not for real estate transactions.

Why We Hold This Position

A typical real estate mold inspection answers a property question: "Is there mold present that would affect the property value or sale?" A CIRS- or MCAS-appropriate inspection answers a medical question: "Will this building cause inflammatory response in a sensitized human being?" These are entirely different questions, requiring different protocols, different sample collection methods, different lab analysis, different report formats, and different action thresholds.

Specifically:

• Sample collection differs. ERMI and HERTSMI-2 require dust sampling, not air sampling. The collection method, location, and surface area matter.
• Lab analysis differs. qPCR-based species identification (Shoemaker Protocol standard) is different from spore-trap microscopy (real-estate standard).
• Action thresholds differ. A "passing" mold inspection for a real estate sale may still produce a HERTSMI-2 score that disqualifies the property for a CIRS patient.
• Report format differs. A physician needs charted, dated, signed environmental data — not a marketing-style PDF with a salesperson's contact info on every page.

We have spent two decades building our practice around the medical question, not the property question. It is the central distinction of what we do.

Position 10 · Humidity Control

Indoor Humidity & RH Targets

Common Question

"What should my indoor humidity be? My thermostat says 60%, is that okay?"

Our Position

Maintain indoor relative humidity between 40% and 50% year-round. Above 60% creates conditions for mold and dust mite proliferation. Below 30% causes respiratory irritation, dry skin, and increased viral transmission. The "comfort range" your thermostat shows is wider than the "health range" your home needs.

Why We Hold This Position

Relative humidity is one of the most under-monitored variables in residential indoor air quality — and one of the most consequential. Almost every mold colonization we find in the absence of an active leak traces back to chronic elevated humidity. And almost every "dry winter air" complaint we hear traces back to humidity that has dropped well below the healthy range during heating season.

Why the 40–50% target matters:

• Above 60% RH: mold spores germinate on common building surfaces. Dust mites — a major asthma and allergy trigger — thrive. Wood swells and contracts. Condensation forms on cooler surfaces (windows, exterior walls, plumbing).
• 50–60% RH: the "marginal zone." Acceptable short-term but not where you want to live year-round, especially with environmentally sensitized occupants.
• 40–50% RH: the target. Inhibits mold and dust mite growth, comfortable for occupants, minimizes condensation, supports healthy mucous membrane function.
• 30–40% RH: acceptable in winter in heating climates but trending toward dry. Watch for static electricity, dry skin, sinus irritation.
• Below 30% RH: respiratory mucosa dries out, reducing the body's natural defense against airborne pathogens. Increased transmission of influenza, RSV, and other respiratory viruses is documented at these levels.

We recommend installing a quality humidity sensor in the primary living area — not a dial that came on a thermostat, but a calibrated digital hygrometer ($20–$40 at any hardware store). Check it weekly. If you cannot maintain the 40–50% range naturally, your home needs either active dehumidification (summer, humid climates) or active humidification (winter, heated climates) — preferably integrated into the HVAC system rather than portable units that only address one room.

Position 11 · Crawlspaces

Crawlspace Ventilation — Vent or Seal?

Common Question

"My crawlspace has vents. Should I open them, close them, or seal it up entirely?"

Our Position

For most homes in the Mid-Atlantic and Southeast climates, the traditionally vented crawlspace is a defective design. In humid summer climates, opening crawlspace vents pulls warm humid air into a cooler space, causing massive condensation. Properly designed encapsulation — sealed and conditioned — is the better choice for the vast majority of homes we inspect.

Why We Hold This Position

The "ventilated crawlspace" was an idea from a different climate era. The original logic was: open vents would let moist air escape. In practice, the opposite happens in humid climates. Here's the physics:

• Outside summer air: 85°F at 70% RH carries a lot of moisture.
• Crawlspace temperature: typically 65–70°F — cooler than outside.
• What happens: warm humid air enters the open vent, encounters cooler surfaces (ductwork, joists, subfloor insulation, foundation walls), reaches its dew point, and condenses. The moisture you were trying to ventilate away just got delivered into your crawlspace.
• Result: chronically damp wood, mold on joists and subfloor, rusted ductwork, deteriorating insulation, and a steady supply of mold spores and moisture entering your living space above through the natural "stack effect."

A properly encapsulated crawlspace addresses these issues directly:

• Heavy-mil vapor barrier on the floor and up the walls, sealed at all seams and penetrations.
• Insulation moved from the ceiling to the walls — making the crawlspace part of the conditioned envelope of the home.
• Vents sealed — the space is no longer trying to communicate with outdoor air.
• Dedicated dehumidification or conditioned-air supply from the HVAC system to maintain target humidity.
• Termite inspection access preserved per local building code requirements.

The exception: dry climates (high desert, mountain regions) where outdoor air is consistently drier than the crawlspace. There, traditional ventilation may still work. In Maryland, Virginia, DC, and most of the Southeast, encapsulation is almost always the right answer. We inspect crawlspaces before recommending changes — because a poorly executed encapsulation can be worse than a vented crawlspace that simply needs a moisture-source repair.

Position 12 · Vehicles

Mold in Vehicles & the Daily Commute

Common Question

"My car was in a flood — or just smells musty. Can it really make me sick?"

Our Position

Yes. Vehicle interiors are sealed, climate-controlled microenvironments that can develop biological contamination just as severe as a home — and for environmentally sensitized people, a contaminated vehicle can be a daily exposure source that completely undermines the work done to remediate the home. Treat your vehicle as part of your indoor environment.

Why We Hold This Position

We have worked with CIRS and MCAS patients who had their homes properly remediated, achieved meaningful clinical improvement, then relapsed without explanation. In multiple cases, the source of the ongoing exposure was the vehicle they drove every day. The average American spends roughly 17,600 minutes per year in their car. For a sensitized person, that's a meaningful exposure window.

After flooding — an urgent situation:

• Flooded vehicles often cannot be safely restored — carpet, padding, seat foam, headliner foam, and dashboard insulation all absorb water and become biological growth media.
• Insurance "total loss" should usually be accepted. A flooded vehicle that's restored and returned to the road often becomes a chronic exposure source for its owner.
• Used car buyers should always check for flood history via vehicle history reports and visible signs: water lines in the trunk, mud in unusual places, rust in non-rust-prone areas, musty odor when the HVAC runs.

Everyday vehicle contamination — the quiet problem:

• Vehicle HVAC evaporator coils are perfect mold growth environments. They stay wet for hours after the AC is shut off. Microbial film develops, and every time you run the AC, you breathe it.
• Cabin air filters are frequently overdue for replacement. Most manufacturers recommend every 15,000–30,000 miles. Most drivers never replace them.
• Wet items in the cabin — gym clothes left in the trunk, an umbrella tossed on a floor mat, a leak from a sunroof or door seal — create localized growth conditions.
• The "musty smell" when AC turns on is mold and bacteria growing on the evaporator coil and in the case housing. It's not a smell to live with — it's a symptom requiring service.

For environmentally sensitized people:

• Replace the cabin air filter with a HEPA-grade or activated-carbon-equipped filter every 15,000 miles or annually.
• Have the HVAC evaporator and case professionally treated if there is any musty odor — most dealerships and many independent shops offer this service.
• Never leave wet items in a closed vehicle for more than a few hours.
• Run the fan-only mode for the last 5–10 minutes of every trip to dry the evaporator coil before parking.
• If you are a CIRS or MCAS patient experiencing unexplained relapse, have your vehicle assessed alongside your home. We provide vehicle assessments using the same protocols we use on homes.

Position 13 · Independence

Why We Don't Do Remediation

Common Question

"Does AMOLDBUSTER perform mold remediation?"

Our Position

No. AMOLDBUSTER provides remediation guidance, consultation, and verification — but we do not perform the remediation work itself. This independence is intentional, and it is the most important position we hold.

Why We Hold This Position

An inspection company that also performs remediation has a financial incentive to find problems that require remediation. The bigger the problem they find, the bigger the job they sell. The math creates unavoidable bias — even for ethical inspectors trying to do the right thing. We removed that incentive from our business model.

Our clients and their physicians can trust our reports because we have nothing to sell except an honest assessment. When remediation is needed, we help you build a clear scope of work, vet qualified contractors, oversee the project, and perform the independent post-work clearance testing — the work that confirms whether the job actually succeeded.

This independence is why:

• CIRS-literate physicians refer their patients to us. They know our reports aren't slanted toward selling work.
• Home buyers trust our go/no-go reports. We have nothing to gain from finding something that isn't there — or from missing something that is.
• Attorneys use our reports. Third-party independence is the standard for litigation-grade environmental documentation.
• Insurance adjusters take our findings seriously. We're not in the chain of contractors with a financial interest in the claim.

This is the single most important thing to understand about AMOLDBUSTER. Every other position on this page flows from this one. No remediation. No referral fees. No products. We sell nothing but the assessment and the interpretation.

Have a Question We Haven't Addressed?

New positions are added as new questions become common.

If you have a question about indoor environmental health that you haven't seen answered here, we want to hear it. Many of these position statements were written because a client, physician, or attorney asked the question first. Yours might be next.

Ask Us a Question Call (240) 347-1142

AMOLDBUSTER — Apollo Environmental Solutions
Point of Rocks, Frederick County, Maryland 21777
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Educational & informational use. AMOLDBUSTER is an independent indoor environmental health and assessment service — inspection and consultation only, no remediation, no referral fees, no products. These position statements are provided for educational purposes and do not constitute medical advice, diagnosis, or treatment. Always consult your physician or qualified healthcare provider regarding any medical condition. © 2026 WeSpiritus — Apollo Environmental Solutions (AMOLDBUSTER). All rights reserved.

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