USPE Maintenance & Compliance Library

Ventilation Planning Checklist

What to work through with your mechanical engineer before an autopsy suite, grossing room, or anatomy lab goes live — and before you place equipment that depends on airflow.

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Ventilation is engineered, not bought. This checklist organizes the conversation with your licensed mechanical engineer and AHJ — it doesn't replace their design.

Room-Level Planning

  • Negative pressure: Autopsy and grossing rooms are commonly designed negative to adjacent corridors so odor and vapor stay in the room. Confirm the design pressure relationship and how it will be verified.
  • Air changes: Autopsy suites are commonly designed in the range of 12 air changes per hour with 100% exhaust (no recirculation). Confirm your jurisdiction's requirement — healthcare facility guidelines and state licensure rules vary.
  • Exhaust routing: Direct to outdoors, away from intakes, doors, and occupied roof areas. No recirculation of autopsy/grossing exhaust.
  • Supply air placement: Supply diffusers positioned so airflow sweeps the breathing zone toward capture points, not across them.

Equipment-Level Planning

  • Downdraft grossing stations like the USPE 1035-01: confirm exhaust connection specs, duct size, and static pressure with the submittal before rough-in.
  • Vented dissection tables like the 1035-06DT-V: locate near planned duct drops; verify the building system provides the draw the table is designed for.
  • Immersion tanks: sealing lids (see the immersion maintenance guide) reduce the open-tank load; plan lid-open events into the room's exhaust capacity.
  • Face velocity checks: establish a commissioning benchmark at capture openings and re-verify after any HVAC rebalancing.

Commissioning & Ongoing Verification

  • Smoke-pencil verification at each capture point at commissioning and monthly thereafter.
  • Pressure relationship check (door-gap smoke test or monitor) on a set schedule.
  • Re-test after ANY change: new equipment, moved walls, rebalanced HVAC, or filter changes upstream.
  • Log results with your Quarterly Inspection Log.
Compliance Notice: Equipment selection should be reviewed with facility safety officers, licensed contractors, ventilation engineers, and applicable authorities having jurisdiction. USPE equipment supports professional workflow and cleanability but does not independently guarantee OSHA, EPA, CAP, Joint Commission, state, local, or institutional compliance.

Related Resources

OSHA / Formaldehyde ChecklistDrainage / Wastewater ChecklistDowndraft Grossing StationFull USPE Catalog

Frequently Asked Questions

How many air changes does an autopsy room need?

A commonly referenced design point is 12 air changes per hour with full exhaust and negative pressure, but the binding number comes from your state licensure rules and adopted facility guidelines. Bring the question to your mechanical engineer early.

Does a downdraft station remove the need for room ventilation?

No — they work together. The station captures at the task; the room system maintains pressure, dilution, and exhaust for everything the station doesn't catch.

When should ventilation be re-verified?

At commissioning, on a routine schedule (monthly smoke checks are cheap insurance), and after any equipment, layout, or HVAC change.

Planning a ventilated suite?

USPE provides equipment exhaust specs and submittals your engineer needs — before rough-in, not after.

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