HEALTHCAREFGINFPA 101

Soiled Utility vs. Soiled Holding
Same Room, or Two Different Rooms?

Three rulebooks govern this room, and they do not agree on whether the two names mean the same thing. Getting that wrong builds the wrong room — or writes up the wrong finding.

By Stanislav Samek, Samektra · 18 min read · Last updated September 4, 2026(Yesterday)

PREPARED BY · FOUNDER & EDITOR

Stanislav Samek

Founder of Samektra Safety Management & Training in Gwinnett County, Georgia, and the writer and editor behind LifeSafetyWiki. Works metro-Atlanta inspections, ITM analysis, plan-review & AHJ readiness, OSHA program development, and life-safety training. Editorial rule on every article: cite the standard, link the section, distinguish state-adopted from published editions, and never invert a constraint.

LinkedIn ↗YouTube: What The Fire Code ↗About the author →samektra.com ↗

The question, and why it has no single answer

If you have walked a hospital with a plan reviewer on one side and a life safety surveyor on the other, you have probably watched them use the words soiled utility and soiled holding to mean different things without either of them noticing. Somebody eventually asks the obvious question — are these two different rooms, or one room with two names? — and gets two confident, contradictory answers.

They are both right, because three separate rulebooks govern that room and they do not agree with each other about whether the distinction exists.

First, who writes these

FGI is the Facility Guidelines Institute — an independent non-profit that publishes the Guidelines for Design and Construction, the book that says what rooms a healthcare facility needs and what goes in them. It is not a fire code and it is not federal law. It matters because most states adopt it by reference for healthcare design, which turns it into an enforceable requirement at plan review. It is written in three-year cycles, and the edition that binds a given space is generally the one in force when that space was designed and built.

NFPA 101, the Life Safety Code, is the fire and egress side. CMS adopts the 2012 edition for Medicare and Medicaid participation, and translates its findings into K-tags — the numbered deficiency codes on a Life Safety Code survey report.

ASHRAE 170, Ventilation of Health Care Facilities, sets the air design — pressure relationships, air changes, filtration, where the exhaust goes.

The three overlap constantly, and each one is enforced by different people at different moments in a building’s life. That is the whole reason this question is confusing.

Rulebook	What it governs, and who enforces it	Two rooms?
FGI Guidelines	Design and construction. Enforced by the state plan reviewer at permit, and by the accreditor for spaces built under it. Fixtures. A soiled workroom is equipped to process; a soiled holding room is equipped only to hold.	DIFFERENT
NFPA 101 / CMS K-tags	Life safety. Enforced by CMS, the accreditor and the fire marshal, for the life of the building. Neither term appears. The code asks what is in the room and how much of it — never what the door sign says.	SAME
ASHRAE 170	Ventilation. Enforced at design, commissioning, and any survey that looks at pressure relationships. The two names share a single combined row in the design-parameter tables.	SAME

Architecture distinguishes them. Fire code and ventilation do not.

That one sentence resolves most of the arguments. The rest of this article is what each rulebook actually says, and the two places where getting it backwards costs real money.

What FGI says: the sink is the dividing line

The FGI Guidelines for Design and Construction is where the distinction is real. Notice first how FGI handles the naming problem — it puts both names in a single section heading, “Soiled Workroom or Soiled Holding Room” FGI 2.1-3.8.12, and then differentiates by what gets installed. The room type is defined by its fixtures, not by its label.

Soiled workroom — built to process

Instrument-washing or clinical sink
Work counter
Handwashing station
Storage
Space for waste and soiled linen receptacles

Soiled holding room — built to hold

Temporary holding of soiled material awaiting collection. Where the processing genuinely happens somewhere else, the processing fixtures — the clinical sink and work counter — can come out.

The handwashing station and the receptacle space do not.

California adopted this structure almost verbatim, which makes the logic easy to read in a free public source: the combined heading lists the full fixture set, then permits the clinic sink and work counter to be omitted where a compliant central sterile supply exists elsewhere and the room is used only for temporary holding CBC §1226.4.13.4.

The worked example FGI itself published

FGI’s interpretations for the 2022 Hospital Guidelines contain a question that is exactly this argument, and the panel’s reasoning is more useful than the ruling. A facility processing ultrasound probes with a self-contained, automated high-level disinfection unit asked whether a soiled workroom was really required, or whether a soiled holding room would do.

The answer was that a soiled workroom is required — but the reasoning is the part worth keeping. The panel pointed out that the automated unit is not plumbed, so gross bioburden has to be washed off the probe before it goes in, and that washing needs an instrument-washing sink. One reviewer put the distinction in a single line: instrument-washing sinks are generally found in a soiled workroom and not a soiled holding room. Another noted the phrase “when necessary” in the standard refers to when high-level disinfection is necessary — not to whether the organization feels like providing the room.

The part most people miss

The panel also agreed the workroom does not have to be in that space. Several reviewers landed on the same practical position: a department can have a soiled holding room locally, as long as staff have access to a soiled workroom elsewhere in the same clinical area. So the real design question is not “which room do I build here” but “where in this clinical area does processing happen, and can staff reach it” — which is an operational question that has to be answered by the clinicians who will use the space, before the architect draws either room.

What the fire code says: neither term exists

Now switch rulebooks, and the distinction evaporates. Search NFPA 101 for “soiled utility” or “soiled holding” and you will not find them. The Life Safety Code does not care what the room is called or what fixtures it has. It asks two questions: what is in the room, and how much of it.

Hazardous areas in health care occupancies are a specific list — boiler and fuel-fired heater rooms, bulk laundries, paint shops, maintenance and repair shops, combustible storage rooms above the area threshold, and rooms with soiled linen or collected trash above the volume threshold NFPA 101 §18.3.2.1 / §19.3.2.1. CMS carries that same language into the survey: K-0321 names soiled linen and trash collection rooms exceeding 64 gallons among the areas requiring enclosure K-0321.

Renaming the room changes nothing

This is the expensive misunderstanding. A room does not stop being a hazardous area because the drawing calls it a holding room instead of a utility room. If it collects soiled linen or trash above the threshold, it needs the enclosure, the rated or smoke-resistant separation as applicable, and the self-closing door — whatever the sign says. The reverse is equally true and gets missed in the other direction: a genuinely small holding room that stays under the threshold is not automatically a hazardous area just because the word “soiled” is on the door. Classify on contents and volume, then look at the sign.

Two thresholds people constantly conflate

There is a room rule and a receptacle rule, they live in different chapters, and they carry different numbers.

Rule	Where it lives	NFPA 101-2012 (CMS / accreditor)	NFPA 101-2024 (e.g. GA state)
The ROOM is it a hazardous area?	Hazardous areas list, §18/19.3.2.1	Soiled linen or trash collection room over 64 gal	Same 64 gal trigger, carried into the 2024 list
The RECEPTACLE left unattended	Operating features, §18/19.7.5	32 gal plus a density limit	Single 64 gal trigger; up to 96 gal for labeled clean-waste recycling and record destruction

That table trips people up because the two rules sound alike and are asking completely different questions. Put plainly:

The ROOM rule asks: does this room need to be built like a hazardous area?

It is about construction — the walls, the barrier or the sprinklers, and a door that closes and latches by itself. If the room is used to collect soiled linen or trash above the threshold, it has to be enclosed that way.

The RECEPTACLE rule asks: where is this container allowed to sit?

It is about housekeeping. A receptacle is the container itself — the linen hamper, the trash barrel, the wheeled cart, the locked shredding bin. If it is over the threshold and nobody is attending it, it has to be inside a room protected as a hazardous area. Not in the corridor, not in an alcove, not tucked behind a door.

What “unattended” actually means

Attended means a staff member is with it, right now, actively using it. A housekeeper working a corridor with their cart beside them is attending it. The moment they walk into a patient room and leave the cart in the hall, it is unattended — and if it is over the threshold, it is now a finding. This is why the citation so often lands on the cart rather than on the room.

Worked example, under the edition CMS enforces: a 40-gallon linen hamper parked in a corridor while staff are elsewhere is already a problem, because it is over the 32-gallon receptacle limit and unattended. Yet a room containing that same 40-gallon hamper is not automatically a hazardous area, because 40 is under the 64-gallon room threshold. Same container, two different rules, two different answers — and both are correct.

The practical consequence is that the receptacle rule is the one your staff break, hourly, without meaning to. The room rule is settled once by the architect and then rarely changes. The receptacle rule is re-decided every time somebody rolls a bin somewhere and walks away.

Two editions, one building

CMS enforces the 2012 edition of NFPA 101 for Medicare and Medicaid participation, and accreditors surveying with deemed status follow it. Your state fire marshal enforces whatever the state adopted — Georgia moved to the 2024 edition in May 2025. A Georgia hospital therefore lives under a 32-gallon unattended-receptacle rule from one enforcer and a 64-gallon one from another, at the same time, in the same corridor. Operate to the tighter number and you satisfy both. This is the same both-editions-bind problem covered in NFPA 101: 2012 vs 2024.

How the room has to be enclosed

Existing health care occupancies keep the either/or: a 1-hour fire barrier or automatic sprinkler protection. Where the sprinkler option is used, the room still needs smoke partitions, and the door is self-closing or automatic-closing either way §19.3.2.1.
New construction under the 2024 edition tightened this. The listed hazardous rooms — soiled linen and trash collection among them — need the 1-hour fire barrier even in a fully sprinklered building §18.3.2.1.2. A separate, shorter list gets smoke partitions instead §18.3.2.1.3.
The door is where the findings actually come from. Self-closing, positive-latching, and not propped — which in a room staff enter with both hands full, all day, is a behavioural problem long before it is a hardware problem.

What ASHRAE says: one row for both

The ventilation standard settles the naming question in the most direct way available: it does not distinguish. ASHRAE 170 lists “soiled workroom or soiled holding” as a single combined entry in its design-parameter tables, cross-referenced to the same FGI section that covers both. Whatever you call the room, the air design is identical:

Negative pressure relative to adjacent areas — the room pulls air in, so odour and contamination do not migrate to the corridor.
All room air exhausted directly outdoors.
No recirculation by means of room units.
MERV-8 minimum filtration.

Be careful quoting air changes from memory

The qualitative requirements above are stable. The air-change numbers are not — they move between editions and between the inpatient and outpatient tables. The 2021 standard as amended lists 2 outdoor and 6 total air changes per hour for this room in the specialized outpatient table; the inpatient table and older editions are not identical, and secondary summaries circulating online disagree with each other.

Confirm the figure against the edition and the table that actually apply to your project before using it for design, commissioning, or a compliance determination. A number quoted from the wrong table is worse than no number.

There is a reason the engineer and the surveyor sometimes cite different editions at each other, and it is not that one of them is wrong. They reach ASHRAE 170 by different routes: the life-safety route runs through NFPA 99, whose 2012 edition is what CMS enforces, while the design route runs through whichever FGI edition the space was designed and built to. Existing spaces are generally held to what they were designed under unless they are renovated. Record which edition each space was designed to — that document is what ends the argument during a survey, and almost nobody has it.

The fourth rulebook: your own infection prevention department

There is a rulebook that is not a code at all, and it is often the one that actually stops your project: the hospital’s own infection prevention and control standards. The clearest example is the question of washable ceiling tile.

Plenty of infection preventionists require sealed, scrubbable, non-porous ceiling tile in a soiled utility room, and will reject a standard fissured mineral-fiber lay-in panel on sight. Contractors get this pushback constantly and go looking for the code section behind it. There usually is not one. Here is the honest picture:

Ceiling requirement	Where it actually comes from
Monolithic ceiling gypsum, no fissures or crevices	FGI, but only in restricted areas — operating rooms, rooms for invasive procedures needing an aseptic field, protective environment rooms, and similar. A soiled utility room is not on that list.
Cleanable with routine housekeeping equipment, no ledges or crevices	FGI’s general surfaces and finishes provisions. This does reach the soiled utility room — but it is a performance requirement, not a product specification. It does not say “vinyl-faced tile.”
Sealed, washable, non-porous tile specifically	Usually institutional policy — the facility’s own IP standards or design criteria, sometimes a health authority’s guidance. Widely recommended in design practice. Rarely a code citation.

The reasoning is sound even where the citation is not

A soiled utility room is a warm, humid, aerosol-generating space. Standard mineral-fiber tile is porous and absorbent; it stains, harbours moisture, and cannot be wiped down without shedding. Every design guide that touches these rooms says the same thing — use washable, sealed ceilings and avoid fibrous materials that trap contaminants. That is good practice whether or not anyone can point to a section number.

So the answer to “is washable ceiling tile required in a soiled utility room?” is: it is required if your organization requires it. Which is a real requirement — just not the kind you argue about with the code book. If the standard exists in writing, cite the policy in the submittal and the argument ends. If it does not exist in writing, that is worth fixing, because right now it is being enforced from memory by whoever shows up to the walkthrough.

There is a telling detail here. One Canadian health authority publishes an infection prevention audit tool specifically for soiled utility rooms, and it is thorough — it checks that work surfaces are flat, seamless and washable, that walls are flat and sealed around plumbing, that floors are flash-coved and seamless, that the hand hygiene sink is used only for hand hygiene and is separate from the utility sink, that faucet aerators are removed, that there is no sink overflow, that PPE is stored away from the soiled area, and that doors stay closed when the room is not in use.

It never mentions the ceiling. Which is the point: ceiling tile is a real infection-control concern and a genuine institutional standard in many hospitals, but it is not a universal one. Ask your IP department what their standard is, in writing, before you specify the room — and notice how many of the items on that audit list are things the fire code and the ventilation standard never look at either.

Which room do I actually need?

Work it in this order. The first two questions are operational, and answering them out of order is how facilities end up with a beautifully detailed room that staff cannot use.

Will anything be processed here? Rinsing, flushing bedpans, washing instruments, disposing of fluid — if yes, it is a workroom, and it needs the clinical or instrument-washing sink and the work counter. Ask the clinicians, not the drawing.
If not, where does processing happen instead? A holding room is only defensible when staff have real access to a workroom in the same clinical area. “Down two corridors and through a badge reader” is not access; it is a future workaround.
How much soiled linen or trash will actually accumulate? This decides the hazardous-area classification, independently of the answers above. Measure the containers you really use, not the ones on the equipment list.
Which editions bind this building? The CMS edition and the state-adopted edition, which may differ. Design and operate to the stricter.
Is the enclosure and door consistent with that classification? Barrier or sprinklers as applicable, smoke partitions where required, self-closing and positive-latching door.
Does the air match? Negative, exhausted outdoors, no room-unit recirculation — verified with a real pressure reading, not an assumption.

What to look at when you walk one

Door propped, or the closer disconnected, or a wedge on the floor.
Door does not positively latch when released from the open position.
Containers over the threshold sitting outside the room, unattended, in a corridor or alcove.
Room pressure reading positive or neutral — tissue-tissue at the undercut is a 5-second screen; a manometer is the record.
A handwashing station being used as an instrument sink, or an instrument sink being used for handwashing.
Clean supplies stored in the soiled room, or the soiled room opening directly into a clean utility room.
Penetrations above the ceiling in what is supposed to be a rated enclosure — this room is a favourite for unsealed conduit.
The sign says holding, the fixtures say workroom, and the ventilation record says neither.

Inspection Report Language

The finding to avoid writing is “soiled utility room not compliant.” Name the classification trigger, the enforcer’s edition, and the specific condition. Copy/paste starting language:

OBSERVATION:
The room labeled 'Soiled Holding' on the 3rd floor medical/surgical unit contains two soiled linen receptacles and one trash receptacle with a combined capacity exceeding 64 gallons. The door is equipped with a self-closing device but was observed propped open with a floor wedge during the survey, and the room was under neutral to slightly positive pressure relative to the corridor when screened at the door undercut.

FIELD BASIS:
NFPA 101-2012 §18.3.2.1 / §19.3.2.1 classify rooms used for the collection of soiled linen or trash above the volume threshold as hazardous areas requiring enclosure, regardless of the room's designated name; CMS carries this into K-0321. Hazardous area doors are required to be self-closing or automatic-closing and to latch. ASHRAE 170 lists soiled workroom or soiled holding as a single entry requiring negative pressure relative to adjacent areas with all room air exhausted directly outdoors and no recirculation by room units.

RISK:
A propped hazardous-area door defeats the enclosure entirely, allowing a fire in a concentrated combustible load to enter the corridor that serves as the defend-in-place egress path for occupants who cannot self-evacuate. Loss of negative pressure allows odour and airborne contamination from soiled material to migrate into the patient corridor.

RECOMMENDED CORRECTIVE ACTION:
Remove the wedge and re-educate unit staff that the door is a required closure, not a convenience; if staff cannot work with a closed door, evaluate a listed hold-open device released by the fire alarm system rather than accepting the prop. Verify the door latches under its own closing force. Have the pressure relationship tested and rebalanced to negative, and document the reading. Confirm the room's classification against both the CMS-enforced 2012 edition and the state-adopted edition, and apply the stricter receptacle threshold.

Ask Clara

Working out which room your project actually needs, or which edition binds a specific condition? Clara — the site’s assistant — knows the hazardous-area thresholds in both editions, the K-tag mapping, and the state adoption picture.

SUGGESTED PROMPT

“What is the difference between a soiled utility room and a soiled holding room, and does it change whether the room is a hazardous area? I need to know which NFPA 101 edition applies for CMS versus my state fire marshal, and what the receptacle volume thresholds are in each.”

▶ Watch: Infection Control Basics for Healthcare Laundry Services

Source: Oregon Patient Safety Commission — clean/soiled separation, airflow direction and surface requirements for linen handling areas · Open on YouTube ↗

Frequently Asked Questions

Is a soiled utility room the same thing as a soiled holding room?

It depends entirely on which rulebook is asking, which is why the question causes so much trouble. For design — FGI — they are different rooms: a soiled workroom (what most people call soiled utility) is equipped to process, with an instrument-washing or clinical sink and a work counter, while a soiled holding room is equipped only to hold material until it is collected. For life safety — NFPA 101 and the CMS K-tags — they are the same, because neither term appears anywhere in the code. The code classifies the room on what is inside it and how much, not on what the sign says. For ventilation, ASHRAE 170 gives "soiled workroom or soiled holding" a single combined row, so the air requirements do not change with the name either. Practical summary: architecture distinguishes them, fire code and ventilation do not.

What actually makes a room a soiled workroom rather than a soiled holding room?

The sink and the work surface. FGI puts both room types under one section heading and then differentiates by what is installed: a soiled workroom is built for processing, which means an instrument-washing or clinical sink plus a work counter, alongside the handwashing station, storage and receptacle space. A soiled holding room is for temporary holding of soiled material awaiting pickup, so where processing genuinely happens elsewhere the processing fixtures can be omitted. The decision is operational before it is architectural: if staff will rinse, flush, or clean anything in that room, it is a workroom regardless of what the drawing calls it.

If I call it a holding room, does it stop being a hazardous area?

No — and this is the single most expensive misunderstanding on the subject. NFPA 101 does not classify hazardous areas by room name. It asks what the room contains and in what quantity. A room used to collect soiled linen or trash above the code threshold is a hazardous area whether the door says soiled utility, soiled holding, soil room, or nothing at all. Renaming the room on the drawing changes the architectural program and changes nothing about the enclosure, the door, or the K-tag. The corollary is also true and often forgotten: a genuinely small holding room that stays under the threshold is not automatically a hazardous area just because it has the word "soiled" on the door.

What is the volume threshold that makes it a hazardous area?

There are two different thresholds and people routinely conflate them. The ROOM threshold sits in the hazardous-areas list: a soiled linen or trash collection room exceeding 64 gallons is a hazardous area, which is the language CMS carries into K-0321. The RECEPTACLE threshold sits in the operating-features chapter and is about containers that are left unattended, and this is where the editions diverge: NFPA 101-2012 uses 32 gallons plus a density limit, while the 2024 edition consolidates to a single 64-gallon trigger with a carve-out up to 96 gallons for labeled clean-waste recycling and record-destruction containers. So under the edition CMS enforces, a 40-gallon unattended barrel in a corridor is already a problem even though the room threshold is 64.

Which edition applies to me — 2012 or 2024?

Very likely both, for different enforcers, and the stricter one governs the condition in front of you. CMS enforces the 2012 edition of NFPA 101 for Medicare and Medicaid participation, and accreditors surveying with deemed status follow suit — so for a hospital, the 2012 thresholds are the ones a K-tag will be written against. Your state fire marshal, meanwhile, enforces whatever edition the state has adopted; Georgia moved to the 2024 edition of NFPA 101 in May 2025. That means a Georgia hospital is simultaneously subject to a 32-gallon unattended-receptacle rule from CMS and a 64-gallon one from the state. Build and operate to the tighter number and both are satisfied.

Are washable ceiling tiles required in a soiled utility room?

Usually by your own organization, not by code. There are three layers here and they get conflated. FGI requires a monolithic ceiling only in restricted areas — operating rooms, rooms needing an aseptic surgical field, protective environment rooms — and a soiled utility room is not on that list. FGI’s general surfaces provisions do reach the room, but as a performance requirement: ceilings must be cleanable with routine housekeeping equipment and must not create ledges or crevices. That is not a product specification and it does not say "vinyl-faced tile." The specific demand for sealed, scrubbable, non-porous panels is almost always institutional infection-prevention policy or a health authority’s design criteria. The reasoning behind it is sound — a soiled room is warm, humid and aerosol-generating, and porous mineral fiber stains, holds moisture and sheds when wiped — so the practice is good even where the citation is missing. Ask your infection prevention department for their standard in writing before you specify the room, because otherwise it gets enforced from memory at the walkthrough.

What is FGI, and is it actually enforceable?

FGI is the Facility Guidelines Institute, an independent non-profit that publishes the Guidelines for Design and Construction of Hospitals and a companion volume for outpatient facilities. It is not a fire code and it is not federal law on its own. It becomes enforceable because most states adopt it by reference for healthcare design and construction, which means your state plan reviewer holds you to it at permit, and an accreditor can hold a space to the edition it was designed and built under. It is revised on a three-year cycle. Practically: FGI governs what rooms you must have and what goes in them, NFPA 101 governs whether the room burns safely and people can get out, and ASHRAE 170 governs the air. All three can apply to the same room at once, which is exactly why the soiled utility question has three different answers.

Do the ventilation requirements change between the two room types?

No. ASHRAE 170 lists "soiled workroom or soiled holding" as one combined entry, so the same air design applies to both: negative pressure relative to adjacent areas, all room air exhausted directly outdoors, no recirculation by means of room units, and MERV-8 minimum filtration. The air-change numbers are where you have to be careful, because they vary by edition and by which table applies — the 2021 standard as amended lists 2 outdoor and 6 total air changes per hour for the specialized-outpatient table, and the inpatient table and older editions are not identical. Confirm the figures against the edition your state or accreditor has actually adopted before using them for design or for a compliance determination.

Why does my accreditor keep citing a different ventilation edition than my engineer used?

Because the two of them arrive at ASHRAE 170 by different routes. The life-safety route runs through NFPA 99, the Health Care Facilities Code, whose 2012 edition — the one CMS enforces — points at the ASHRAE 170 edition current to it. The design route runs through the FGI Guidelines edition the space was designed and built to, which for a recent project is a much newer ASHRAE. This is not a contradiction so much as a layering: existing spaces are generally held to what they were designed to unless renovated, while new work is held to the current adopted edition. Document which edition each space was designed under; that record is what settles the argument during a survey.

Does any of this apply outside hospitals?

The fire-code half does, essentially unchanged. Ambulatory health care occupancies carry the same hazardous-area logic, and the FGI Guidelines publish a separate volume for outpatient facilities with the same soiled workroom versus holding room distinction. What varies is the enclosure relief: in existing healthcare occupancies the hazardous-area requirement can be met with a 1-hour barrier or with automatic sprinkler protection, whereas the 2024 edition tightened new construction so the listed rooms need the 1-hour barrier even in a fully sprinklered building. Nursing homes, behavioral health and outpatient surgery all generate soiled linen and trash, and all get looked at.

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References

1. NFPA 101, Life Safety Code, 2012 edition (CMS-adopted) — §18.3.2.1 and §19.3.2.1 hazardous areas; §18.7.5 / §19.7.5 furnishings and receptacles. Decoded on this site at NFPA 101 (2012) Decoded.

2. NFPA 101, Life Safety Code, 2024 edition — §18.3.2.1 (1-hour barriers for the listed hazardous rooms in new construction, and the smoke-partition list at §18.3.2.1.3); §19.3.2.1 (existing either/or, with smoke partitions per §8.4 where the sprinkler option is used); §18.7.5.7.1 and §18.7.5.7.2 (unattended receptacle threshold and the labeled clean-waste carve-out).

3. CMS, State Operations Manual, Appendix I — K-0321, Hazardous Areas — Enclosure. Lists soiled linen and trash collection rooms exceeding 64 gallons among the hazardous areas requiring enclosure.

4. Facility Guidelines Institute, Guidelines for Design and Construction of Hospitals, 2022 edition — §2.1-3.8.12, Soiled Workroom or Soiled Holding Room (the section reference cross-cited by ASHRAE 170).

5. Facility Guidelines Institute, Interpretations, 2022 Hospital Guidelines — the ultrasound-probe interpretation on §2.2-3.5.8.19(2)(b), in which the review panel concludes a soiled workroom with an instrument-washing sink is required and observes that instrument-washing sinks are generally found in a soiled workroom and not a soiled holding room.

6. ANSI/ASHRAE/ASHE Addendum h to Standard 170-2021, Ventilation of Health Care Facilities — design-parameter table entry for “soiled workroom or soiled holding,” cross-referenced to FGI 2.1-3.8.12. Values cited in this article are from the specialized-outpatient table; confirm against the edition and table applicable to your project.

7. NFPA 99, Health Care Facilities Code, 2012 edition — the ventilation route CMS and accreditors reach ASHRAE 170 through.

8. Georgia Rule 120-3-3, adopting the 2024 edition of NFPA 101 effective May 27, 2025 — the source of the two-edition overlay described here for Georgia facilities. See NFPA 101: 2012 vs 2024.

9. Facility Guidelines Institute — surfaces and finishes provisions on ceilings (cleanable with routine housekeeping equipment; no ledges or crevices), and the restricted-area list requiring monolithic ceilings. Note that soiled workrooms and soiled holding rooms are not among the rooms requiring a monolithic ceiling; the 2022 cycle did extend monolithic flooring and integral wall base to these rooms.

10. Fraser Health, Infection Prevention & Control Soiled Utility Room Audit Tool — a working health-authority audit checklist for these rooms. Audits work surfaces, walls, floors, sink separation, PPE storage, storage, workflow direction and door closure; notably contains no ceiling item, which is why this article treats washable ceiling tile as an institutional standard rather than a universal one.

11. Oregon Patient Safety Commission, Infection Control Basics for Healthcare Laundry Services, Part 1 — the embedded video. Covers clean/soiled separation, directional airflow and physical characteristics for linen handling areas. It addresses laundry processing areas rather than the unit soiled room, but the separation and surface principles are the same ones at issue here.

12. California Building Code §1226.4.13.4, Soiled Workroom or Soiled Holding Room — an example of a state adopting the combined heading with an explicit allowance to omit the clinical sink and work counter where the room is used only for temporary holding and compliant central sterile supply exists elsewhere.

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Soiled Utility vs. Soiled HoldingSame Room, or Two Different Rooms?