HPDs & Why They Matter

Healthy materials mean proof, not just an HPD

Toby Urff
Toby UrffProduct Manager
March 30, 20265 min read

Architects asking for “healthy materials” are not asking for a single document. They are checking whether a product protects occupants today and steers clear of chemical regrets tomorrow. That scrutiny influences whether a product is shortlisted, how fast specs move, and how many clarifying emails your team fields. Win the review by separating ingredient transparency from actual human‑health performance, then showing airtight evidence across emissions, disclosure, and optimization.

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Healthy materials mean proof, not just an HPD
Architects asking for “healthy materials” are not asking for a single document. They are checking whether a product protects occupants today and steers clear of chemical regrets tomorrow. That scrutiny influences whether a product is shortlisted, how fast specs move, and how many clarifying emails your team fields. Win the review by separating ingredient transparency from actual human‑health performance, then showing airtight evidence across emissions, disclosure, and optimization.

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Ingredient lists vs human‑health performance

An HPD is an ingredient disclosure. Human‑health performance is a product outcome in real rooms with real people. Think of the HPD as the x‑ray report and performance as whether the patient can climb stairs without wheezing.

Architects will read the HPD, then ask what the chemistry does in use. If the only answer is “we have an HPD,” the review stalls.

The pledge raised the bar to a professional duty

Firms signing the human‑health pledge treat harmful substances and indoor emissions as part of their standard of care. That means the conversation shifts from marketing claims to professional liability and occupant safety. Submittals are expected to help a design team meet that duty, not just advertise transparency.

The chemical universe is massive, so guessing is risky

Endocrine disruptors can interfere with hormone regulation, development, and metabolism. This is why architects push for both screening and emissions controls, not either or.

There are over 160 million substances in the CAS Registry, with current CAS materials noting totals in the hundreds of millions, so coverage is necessarily evolving (CAS Data, 2025) (CAS, 2025). In the U.S., the TSCA Inventory lists 86,862 chemicals and identifies 42,578 as active, and EPA continues to evaluate and prioritize risks over multi‑year cycles (EPA TSCA Inventory, 2025) (EPA, 2025).

The three‑part bar architects actually expect

Human‑health performance in practice is a three‑legged stool. Remove one leg and the chair tips.

  1. Standardized emissions testing that aligns with recognized methods, for example CDPH Standard Method v1.2, ISO 16000 series, or EN 16516. Report full chamber results for the relevant use pattern and loading.
  2. Transparent, third‑party‑verified ingredient disclosure that reaches meaningful thresholds by mass and covers residuals and impurities where feasible. Disclosure without verification slows trust.
  3. Product optimization that removes or substitutes substances of concern, with screening evidence and version control. Optimization is where performance moves from “known” to “better.”

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VOC content and VOC emissions are different questions

VOC limits in a can or cartridge address shipping, flammability, and regional smog rules. VOC emissions testing measures what escapes into breathing zones after installation. These are not interchangeable and both should be answered on submittal forms. Give the VOC content per the applicable rule and the emissions report for the use category. Mixing them up is a common speed‑bump that costs days in review.

What documentation belongs in the architect’s hands

Bring the whole picture, not piecemeal PDFs. A concise package keeps the spec moving and reduces RFI ping‑pong.

  • Emissions test report summary with method, exposure scenario, calculation date, and pass criteria mapping to project frameworks where relevant.
  • Current HPD with third‑party verification noted, or an equivalent third‑party‑verified disclosure.
  • Optimization proof that references accepted screening systems and any redesign notes with effective dates.
  • A one‑page crosswalk that ties the above to project asks in LEED v5, WELL, CHPS, or owner standards where applicable.

The screening and certification map architects use

Expect reviewers to recognize these systems by name: HPDs, Declare, Living Product Challenge, Cradle to Cradle, BIFMA LEVEL, OEKO‑TEX, ILFI Red List, Green Science Policy Institute Six Classes, and the Cradle to Cradle Banned List. Use them to screen, disclose, and guide optimization. Do not toss logos without showing scope, version, and what is covered across your full bill of materials.

How to present emissions data like a pro

Lead with the method, then the numbers. Example format that lands cleanly: method and lab ID, exposure scenario and loading, 14‑day TVOC and key analytes, comparison to the relevant acceptance criteria, and any unrestricted use notes. If you reformulated, include the date code so procurement does not mix old and new lots. That tiny detail saves projects from avoidable re‑tests adn change orders.

Ingredient transparency that actually builds trust

Publish the HPD with thresholds that matter to specifiers, show identified residuals when known, and mark any remaining proprietary ranges responsibly. If you use a hazard screening, say which one and when it was last run. Third‑party verification signals maturity of your program and shortens review time because the questions are answered up front.

Optimization is your competitive story

If you phased out a glycol ether, swapped a plasticizer, or moved to a phenol‑free resin, say so plainly. Link the change to the screening system that guided the decision and the emissions improvement if observed. This is where healthy materials turn into sales outcomes because the risk narrative is reduced for the design team choosing among near‑equals.

Bring it together for faster approvals

Healthy materials is a performance claim backed by three proofs: emissions testing, verified disclosure, and optimization. When those are complete and current, architects can fulfill their pledge‑driven duty without slowing your sale. Make it effortless to check the boxes and your product spends more time in specs and less time in limbo.

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Frequently Asked Questions

What is the difference between VOC limits and VOC emissions tests and why do architects need both?

VOC limits measure solvent content in the product as sold, tied to rules like SCAQMD. VOC emissions tests measure what off‑gasses after installation under controlled conditions like CDPH v1.2. They answer different health and compliance questions, so both are requested on submittals.

Why does the sheer number of chemicals matter for our documentation strategy?

The chemical universe is enormous and evolving. CAS lists hundreds of millions of substances and TSCA tracks more than 86,000 in U.S. commerce (CAS, 2025) ([CAS](https://www.cas.org/cas-data)); (EPA TSCA Inventory, 2025) ([EPA](https://www.epa.gov/tsca-inventory/how-access-tsca-inventory)). This scale is why architects expect standardized testing, verified disclosure, and ongoing optimization rather than a one‑time statement.

Which screening systems should we reference in our materials health narrative?

Commonly recognized systems include HPDs, Declare, Living Product Challenge, Cradle to Cradle, BIFMA LEVEL, OEKO‑TEX, ILFI Red List, Green Science Policy Institute Six Classes, and the Cradle to Cradle Banned List. Use them to frame both disclosure and optimization decisions.

What belongs in a clean submittal packet for human‑health review?

Provide an emissions summary with method and pass criteria, a third‑party‑verified ingredient disclosure, optimization evidence cross‑referenced to accepted lists, and a simple mapping to the project’s framework asks. Keep dates and versioning clear to avoid re‑tests.

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About the Author

Photo of Toby Urff

Toby Urff

Product Manager at Parq

With a passion for sustainability and a love for complex data, Toby helps manufacturers efficiently collect data from across their organization and get their EPDs done right. He’s especially interested in how AI can support human expertise, helping R&D and factory teams work faster, smarter, and with less friction.

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