Confirm the protected spaces and the listed system and application the design relies on, then trace nozzles, piping, pump or cylinder units, water supply, power, and alarm interfaces through the package. AI can flag conflicts; the qualified designer confirms performance and compliance.
What does NFPA 750 cover?
NFPA 750 is the Standard on Water Mist Fire Protection Systems. NFPA describes the standardization of design, installation, maintenance, and testing requirements for water mist fire suppression systems.
NFPA’s official NFPA 750 page identifies the 2027 edition as current when checked on October 1, 2026. Confirm the edition, local amendments, and project scope that actually govern the work. The publisher’s newest edition does not establish local adoption.
Record the protected occupancy or hazard, the system type the specification names, and the listing or test basis the designer cites. Water mist criteria are not interchangeable with NFPA 13 sprinkler criteria, so keep the two scopes separate where a building uses both.
Gather the protected spaces and the system components
Collect the water mist layout and isometric, nozzle and component data, pump or cylinder unit details, water supply information, the architectural plans and reflected ceiling plans of protected spaces, structural support details, electrical power and control documents, and the fire alarm interface. Include the water mist specification.
Note where the protected spaces changed after the mist design was drawn, and any listing or test documentation the design cites but the package does not include.
Connect the protected space to the mist design
| Review question | Sources to compare | Decision to record |
|---|---|---|
| Protected hazard and listing | Mist design notes, specification, listing documents | Confirm the stated application matches the spaces actually protected. |
| Room geometry and ceilings | Architectural plans, RCP, sections, mist layout | Identify changed rooms, ceiling heights, or obstructions behind the nozzle layout. |
| Pump or cylinder unit | Equipment room plan, unit data, structural support | Check the unit’s location, access, and support in the current drawings. |
| Water supply | Plumbing or fire water plans, supply notes, tank details | Trace the stated supply to its source and connection. |
| Power and controls | Electrical one-line, panel schedule, control diagrams | Match the unit’s power source and monitoring to the electrical documents. |
| Alarm interface | Fire alarm plans and matrix, mist panel notes | Reconcile how flow, trouble, and supervisory signals report. |
Use the sprinkler document checklist as a starting log for piping and component checks, and the NFPA 20 pump guide where a stationary fire pump also serves the building.
Example: a raised ceiling changes a protected room
Hypothetical example. The revised reflected ceiling plan raises the ceiling in a protected heritage room to expose a beam, while the water mist layout still uses the earlier ceiling height and nozzle positions.
The current ceiling plan changes the height and exposes a beam in a room protected by the water mist system, and the mist layout reflects the previous ceiling. Please confirm the nozzle arrangement against the listed application for the revised geometry.
The water mist designer checks the revised geometry against the system’s listing and test basis and updates the layout. The drawing conflict is a coordination question, not a performance verdict.
Review water mist coordination with Groundbook
Upload the current project PDFs and relevant specifications to Groundbook. Identify the governing issues and add the applicable NFPA 750 reference from a copy you are licensed to use, where the license permits uploading it. State the edition, amendments, review area, and known exclusions in your instructions.
Compare the water mist layout and component data with current architectural plans and ceilings, the pump or cylinder unit location, water supply, electrical power, and fire alarm interface documents. Flag changed geometry and missing interfaces. Use the supplied NFPA 750 reference where applicable and cite both sources.
Groundbook links each potential finding to its source sheets. Verify the protected space and revision first, and record missing listing or test documentation separately from drawing conflicts.
Document review does not validate hydraulic or pneumatic performance, confirm a listing, or approve the system. Those remain with the qualified designer, the listing organization’s documentation, and the authority having jurisdiction.