CaptiveAire Kitchen Suppression Systems
TANK · CORE · EWC — pre-engineered, electronically detected suppression for commercial cooking lines

Why CaptiveAire Looks Different on the Truck

If you spent a decade pulling fusible links out of Ansul R-102 systems and then walked under a CaptiveAire hood for the first time, the first thing you noticed was an absence: there was no detection cable run from the hood plenum down to the agent tank. CaptiveAire pre-engineered suppression systems use electronic thermal detection wired to a control panel, not the soldered-link-and-tensioned-cable chain that has driven kitchen suppression for fifty years.

That single architectural choice cascades into every part of how the system is sized, installed, and serviced. CaptiveAire is also unusual in that the same manufacturer ships the hood, the make-up air unit, the exhaust fan, the gas valve, and the suppression system as a single engineered package. When the suppression system is part of the hood factory order, the duct geometry, the nozzle layout, and the appliance positioning are all known to the design engineer in advance, and the suppression system listing is built around that exact configuration NFPA 17A §4.1.

CaptiveAire is a private US company headquartered in Raleigh, North Carolina, founded in 1976. Their suppression line currently consists of three distinct products: TANK (tank-based wet chemical with electronic detection), CORE (water-based with surfactant, UL 300 listed), and EWC (Electric Wet Chemical with pneumatic primary/secondary actuators triggered by an electric solenoid). Each is pre-engineered to NFPA 17A or UL 300 and meets the cooking-equipment requirements of NFPA 96.

The Three Systems at a Glance

The product names overlap in marketing material, so be careful when reading a service tag: a tag that says “CaptiveAire” tells you nothing about the chemistry. The line below it (TANK / CORE / EWC) is what determines the agent, the cleanup procedure, the spare-parts list, and the tools you need on the truck.

System 1 — TANK (Wet Chemical, Electronic Detection)

TANK is the closest CaptiveAire equivalent to a traditional Ansul R-102 system, with one major architectural change: detection runs through an electronic control panel rather than mechanical fusible links and tensioned cable. The agent itself behaves the same way — saponification on hot grease produces a foam blanket that smothers and cools the surface, satisfying UL 300.

Components

Agent cylinder. Mild-steel cylinder (4BW250 DOT / 4BWM-17 TC spec, 10 in. diameter, ~23¼ in. tall) factory-filled with Aqueous Potassium Carbonate (APC) liquid suppressant and pressurized to 200 psig at 70 °F. Each cylinder supports up to 5 nozzles for a maximum of 20 flow points; nozzle counts above five require a second cylinder. The face gauge should read in the green band — that range varies with ambient temperature, from ~175 psig at 32 °F to ~225 psig at 130 °F (the system's listed operating range). Tanks are never field-filled with agent — replace the entire cylinder, never refill OIM Cylinder Tank Assembly.

Cylinder count and manifold layout. Single-cylinder systems are independently piped. Two-cylinder systems share a manifold. Three-cylinder systems use one manifold-pair plus one independent cylinder. Four-cylinder systems use two separate manifold-pairs. A primary actuator can pneumatically drive up to three secondary cylinders through SVAs OIM Installation §15.

Distribution piping and nozzles. Stainless or chrome-plated piping, with appliance, duct, and plenum nozzles installed per the listed configuration. Each nozzle has a blow-off cap that pushes off on discharge.

Electronic control panel. Listed kitchen-suppression releasing panel with battery backup, supervised initiating circuits, alarm and supervisory output relays, and a discharge output that drives the agent cylinder release solenoid. Programmable for multiple zones if the hood is split.

Thermal detector(s) (Firestat). A listed Fenwal Detect-a-Fire snap-disc thermal sensor mounted in each exhaust riser at the duct connection. Factory set to 360 °F for non-solid-fuel light/medium-duty appliances. Heavy-duty 600 °F-rated appliances with horizontal duct over 25 ft require downstream detection. Solid-fuel (700 °F-rated) appliances require 600 °F-rated Firestats plus additional downstream Firestats at the duct discharge when the run exceeds 10 ft (and a third sensor when the run exceeds 50 ft). The supervised loop runs through metallic conduit using high-temperature MG/MGT wiring and Wago 221-412 connectors; opens and shorts are annunciated on the control board OIM Firestat §58.

Manual pull station. Required by NFPA 17A and NFPA 96 even though detection is electronic. Located on the path of egress, 42–48 inches above the floor, between 10 and 20 feet from the hazard.

Gas valve and shunt-trip outputs. Electric solenoid gas valve held open while energized; loses power on discharge or panel trouble and drops closed. Shunt trip on the appliance branch breaker drops electric appliances at the same instant.

The Commercial Appliance Outlet Center (CAOC). CaptiveAire’s integrated package often includes a dedicated stainless cabinet that combines the main service disconnect, the e-stop “PUSH TO KILL” mushroom button, and an individually-labeled green LED breaker for every appliance under the hood. The ETL-listed CAOC consolidates the kitchen-side electrical interlock into a single visible panel — the e-stop drops everything at once, while each LED breaker can be opened individually for maintenance without taking the whole line down. This is what an inspector sees when they look at a modern CaptiveAire kitchen.

Fire alarm interface. Auxiliary contacts for waterflow / discharge alarm, supervisory (low pressure / detector trouble), and trouble (battery / AC / open circuit) signals to the building FACP.

Activation Sequence

1. Detector closes at its setpoint (360 °F standard) or the manual activation device (MAD) is pushed. 2. The control panel sends a momentary 24 V DC release signal to the PAK solenoid. 3. The PAK solenoid opens, allowing primary-cylinder pressure to flow through the solenoid + check valve into the primary actuator and any interconnected SVAs. 4. Each actuator's piston extends and locks via a spring-loaded locking pin, ensuring complete cylinder discharge. 5. Cylinder valves open; APC discharges through the piping and nozzles. 6. Gas valve solenoid is de-energized and closes; shunt trip fires; exhaust fan typically remains running to clear smoke. 7. Discharge contact closes, signaling the building FACP. Total time from detector trip to nozzle wet is typically under 4 seconds OIM PAK §12.

Listings & Approvals

The TANK system is ETL Listed to ANSI/CAN/UL/ULC 300 and ULC/ORD-C1254.6 for Canadian installations. The microprocessor-based control board (CORE / ECPM03) is ETL Listed to UL 864 and CAN/ULC-S527-11 (releasing service). The system is accepted for use in New York City under FDNY Certificate of Approval (COA) #5870. Manufacturer warranty is 60 months from shipment, voided by non-factory-trained service or out-of-spec installation OIM Certifications §8.

System 2 — CORE (Water-Based, UL 300)

CORE is the unusual one. It is a UL 300-listed kitchen-suppression system whose agent is water with a surfactant additive, not wet chemical. The system is ETL listed under report 104229452COL-002 to UL 300 and ULC/ORD-C1254.6, and it is engineered to meet the same Class K performance requirements that wet chemical systems do.

CORE was developed for restaurants that wanted UL 300 protection without the post-discharge cleanup burden of saponified wet chemical. Water + surfactant rinses out of duct work, off stainless, and out of porous floor tile far more easily than potassium-based foam, and the surfactant is what carries the cooling and oxygen-displacement performance that UL 300 demands. The trade-off: CORE depends on a domestic water supply at the design pressure, plus battery-backed control logic, so it has more failure modes than a pressurized cylinder.

Configuration

Total Flood uses overlapping appliance nozzles to cover every position under the hood, giving installers latitude on appliance placement. Duct + Plenum coverage runs through a continuous spray bar mounted full-length across the hood directly behind the filters. The duct and plenum agent is water injected with surfactant.

Operating water pressure varies with hood length but is typically in the 30–70 psi range when discharging. The system is supplied from a domestic cold-water connection sized to the design flow, with a backup pressure source where the local AHJ requires it.

Activation Sequence

Detection is the same Firestat-type 360 °F thermal sensor (or rate-of-rise) used in TANK. On trip, the panel opens an electric water-supply valve, the surfactant injector primes, and water + surfactant flows through the spray bar and the appliance nozzles for the listed duration. The post-discharge reset procedure is documented by CaptiveAire and includes inspecting nozzles, piping connections, hood lights, hood insulation, and all wiring before returning the system to service. Cleanup is mostly water and degreaser rather than the alkaline wet-chemical rinse needed after a TANK discharge.

System 3 — EWC (Electric Wet Chemical)

EWC is the pneumatic-actuated multi-cylinder cousin to TANK. It uses a wet chemical liquid agent stored in cylinders (primary plus optional secondaries), but the cylinder valves are opened by pneumatic actuators rather than direct mechanical or solenoid valves. An electric solenoid valve gates the actuation pressure: when the panel commands discharge, the solenoid opens, allowing pressure from the primary cylinder to flow to the Primary Actuator Kit (PAK) and Secondary Valve Actuators (SVA), which open the cylinder valves and discharge agent into the piping.

The architecture exists because some installations need more agent than a single TANK cylinder can deliver. With EWC, the design engineer can chain a primary cylinder to one or more secondary cylinders, all firing through a synchronized pneumatic chain, while still keeping the detection and trigger logic on the electronic control panel. That gives the supervisory benefits of electronic detection with the flow capacity of a multi-cylinder system.

Gas-valve handling on EWC is the same as TANK: an electric gas shut-off valve held open by an energized solenoid drops closed when the panel relay de-energizes on discharge. All gas and electric appliances under the hood must be electrically interlocked to shut off, which is achieved through a gas valve relay or a shunt-trip breaker per NFPA 96 §10.4.

The Wet-Chemical Agent SDS — What's Actually in the Tank

The CaptiveAire TANK liquid agent (CaptiveAire branding: CaptiveAire Liquid Fire Suppressant) is Aqueous Potassium Carbonate (APC) — per the official SDS, a mixture of water (CAS 7732-18-5, 30–60%) and potassium carbonate (CAS 584-08-7, 30–60%). The pressurized form uses nitrogen as the expellant SDS §3. The chemistry is similar to other UL 300 wet-chemical agents (Ansul Ansulex, Amerex KP, Pyro-Chem PCL Plus); the differences across brands are surfactant package, viscosity, and listed nozzle/flow points, not the underlying saponification mechanism.

Hazard Profile (per CaptiveAire TANK Agent SDS, Feb 2019)

Appearance: clear, odorless liquid. pH: >11 (alkaline). Specific gravity: ~1.4. Boiling point: 108.9 °C (228 °F). Solubility: soluble (miscible) in water. Flammability: non-flammable; not explosive. Stability: stable under normal storage; avoid direct sunlight and contact with incompatible materials (acids, ammonium compounds, metals, water-reactive materials) SDS §9, §10.

GHS classification: Serious eye damage/eye irritation Category 2A · Specific Target Organ Toxicity (single exposure) Category 3 · pressurized form additionally classified as Gas under pressure (compressed gas). Signal word: Warning SDS §2.

NFPA 704 ratings (per SDS): Health 2 · Flammability 0 · Reactivity 0 · No special hazards. HMIS: Health 2 · Flammability 0 · Physical Hazard 0 SDS §16.

Health hazards: causes serious eye irritation; may cause respiratory irritation. Repeated skin contact can cause defatting. Acute toxicity for potassium carbonate is low (Oral LD₅₀ rat >2,000 mg/kg; dermal LD₅₀ rabbit >2,000 mg/kg) and the agent is not classified as carcinogenic by NTP, IARC, or OSHA SDS §11.

Other hazards (electrical): APC is electrically conductive in the wet state. The OIM explicitly warns: do not clean up wet agent or touch electric appliances, outlets, or wiring with electric power on — de-energize the appliance branch at the panel before cleanup OIM Post-Discharge Maintenance.

PPE for Cleanup

Per SDS §8, service technicians and kitchen staff cleaning up after a discharge should wear gloves (rubber/nitrile/neoprene), chemical goggles or safety glasses with side shields, and normal work wear. Respiratory protection is not normally required — only in oxygen-deficient atmospheres, and an SCBA (not a cartridge respirator) is needed. Provide ventilation (open the kitchen, run exhaust on low) while wiping down. If skin contact occurs, wash with soap and water; if eye contact occurs, flood the eye with water for at least 15 minutes and seek medical attention if soreness or redness persists. Spill response: contain and absorb with inert material, dispose per local regulation; do not pour large quantities into drains or watercourses (LC₅₀ bluegill 230 mg/L) SDS §6, §12.

Standards Map — What Code Applies to Each Piece

NFPA 17A — Wet chemical extinguishing systems. Governs design, installation, ITM, and 12-year cylinder + hose hydro for TANK and EWC. Semi-annual service is §7.4.

UL 300 — Pre-engineered cooking-equipment fire-test standard. All three CaptiveAire systems are listed to UL 300 (CORE additionally to ULC/ORD-C1254.6 for Canadian sites). The listing controls which appliance configurations are protected and how many flow points each cylinder serves.

NFPA 96 — Cooking ventilation control + fire protection. Section 10.4 mandates the gas-shutoff interlock; §10.5 requires a manual pull station regardless of detection method; §11.2 governs the semi-annual inspection.

NFPA 72 — Fire alarm and signaling. Applies to the supervisory and alarm interface between the kitchen panel and the building FACP. The control panel itself is a releasing service device under NFPA 72 §23.

NFPA 70 — National Electrical Code. Governs the wiring of the panel, the gas-valve solenoid circuit, the shunt-trip output, and any supervisory tie to the FACP.

NFPA 10 — Portable fire extinguishers. A Class K extinguisher must still be installed within 30 feet of the cooking equipment, regardless of which CaptiveAire system is on the hood NFPA 10 §6.6.

Semi-Annual Inspection — Step by Step

The full semi-annual under NFPA 17A §7.4 and NFPA 96 §11.2 covers eight functional areas. Each is documented on the service tag.

The single most important step in every CaptiveAire ITM is isolating the cylinder before commanding discharge from the panel. The whole point of testing the discharge output is to verify the panel will fire the solenoid, the gas valve will drop, and the shunt trip will fire — without actually wetting the kitchen. CaptiveAire OIMs document the cylinder isolation procedure for each system family. Skipping it is the most common cause of accidental discharge during a semi-annual (see the Test-Discharge Lessons Learned companion article).

Discharge-Output Functional Test (Cylinder Isolated)

The cleanest way to functionally verify the discharge output without wetting the kitchen is to isolate the agent line and inject test pressure from an external nitrogen rig. The technician disconnects the agent supply line at the cylinder bank, plumbs a regulated nitrogen bottle into the actuation circuit through dedicated test hoses, and then commands discharge from the panel. Pressure travels through the actuation chain exactly as it would in a live discharge — driving the gas-valve solenoid, the shunt-trip output, and the alarm interface — but no wet chemical leaves a cylinder.

2-Year and 12-Year Maintenance

Every 2 years: the OIM mandates replacement of both control-panel batteries (CaptiveAire P/N PS-1270-F2, qty 2 — 12 V 7 Ah sealed lead-acid), and full inspection of all wiring and plumbing for corrosion or insulation damage. Skipping the 2-year battery swap voids the warranty and is the most common ITM finding OIM Maintenance §72.

Every 12 years: per NFPA 17A §7.5 and the OIM, the agent cylinder must be replaced (CaptiveAire does not field-test cylinders — they swap), and pneumatic actuation hoses must be hydrostatically tested at 500 psi or replaced on the same cycle. CaptiveAire ships matched dated cylinders and hoses; service technicians swap on the cycle and document with a tag. CORE has its own equivalent check on the water-supply piping, surfactant tank, and any pressure storage.

Control-Panel Battery Backup — The Most-Overlooked Service Item

The CaptiveAire CORE / ECPM03 control board runs on 120 V AC primary with a 24 V DC battery backup built from two 12 V 7 Ah sealed lead-acid (SLA) batteries wired in series (CaptiveAire P/N PS-1270-F2). The pair maintains the panel in supervisory state for ~24 hours and can deliver alarm current for the discharge-output sequence required by NFPA 72 §10.6.7. If the batteries are dead, the panel logs a trouble signal but is unable to actuate the solenoid when AC fails — meaning a power outage during a fire is a worst-case scenario.

Why batteries fail before the 2-year mark. SLA batteries lose capacity even without being cycled — sulfation, internal corrosion, and case shrinkage all accumulate over time. A battery that reads 12.7 V on an open-circuit meter today may drop to 10 V under a 3 A discharge load. Kitchen environments accelerate this further: the panel sits in a stainless cabinet that traps heat, and the ambient kitchen humidity drives oxidation on the terminal posts.

Annual replacement as a service-contract practice. Some service contractors include annual battery replacement in their maintenance plans rather than waiting for the 2-year manufacturer minimum. The reasoning: SLA chemistry is variable batch-to-batch, kitchen environments accelerate aging, and an “all-green” panel that drops out 18 months in is more expensive to diagnose than the cost of replacing yearly. The 2-year OIM mandate is the floor, not the ceiling — annual replacement is a defensible upgrade for high-volume kitchens, 24/7 facilities, and sites without redundant fire-detection.

Correct field load-test sequence. A multimeter reading on a battery in float charge tells you almost nothing. The proper test:

1. With AC power present, record battery terminal voltage. Healthy float reading: 13.5–13.8 V across the pair.
2. Disconnect AC (open the panel breaker or pull the AC connector at the power supply).
3. Let the panel run on battery for 5 minutes — confirm display stays up, supervisory LED is normal, no nuisance alarms.
4. Record terminal voltage under this no-alarm supervisory load. Target ≥ 24.0 V across the pair (≥ 12.0 V per cell); below 23.0 V indicates degraded.
5. Simulate a discharge command from the panel (with the cylinder isolated). Confirm the alarm relay drives, the gas-valve solenoid drops, and the shunt-trip output fires — all while running on battery only.
6. Record terminal voltage under alarm load. Target ≥ 22.5 V (~ 11.25 V per cell); below 21.0 V indicates near-failure.
7. Restore AC, verify charging current rises (charge LED active on the power supply); re-record voltage 30 minutes later (should be back to float reading 13.5–13.8 V per cell).

If any of the four voltage checkpoints fails, replace both batteries as a matched pair — never just one. Mismatched-age batteries will pull the healthy one down to the weak one's level within weeks.

What to look for at every visit. Date label on each battery (illegible / missing = replace as the safest path); both batteries dated within 6 months of each other; case not bulging or swollen; terminals clean (whitish powder on the +/− posts is outgassing — replace immediately regardless of voltage); cable boots intact; no melted plastic from a former heat issue. The CaptiveAire P/N PS-1270-F2 is rated to the panel's UL 864 listing; substituting a generic 12 V 7 Ah SLA technically voids the listing — some AHJs check the manufacturer label on the cell.

Battery-related trouble signals the panel displays: LOW BATT or yellow trouble LED — voltage threshold tripped at the panel; replace within 24 hours. AC FAIL with sustained operation — the panel switched to battery during the visit, verify within 24 hours that the battery has recharged. BATT MISSING or open-loop — one or both batteries disconnected, terminal corroded through, or one cell dead pulling the pair below the detection threshold. Any sustained battery-related trouble older than 24 hours is a finding under NFPA 17A §7.4 even if everything else passes.

Service-Test Functional Checks (per OIM)

The OIM Start-Up / Inspection Test Procedure specifies the exact pressure thresholds the technician verifies during a non-discharge functional test using an external nitrogen rig:

• Test pressure: regulate nitrogen to 200–225 psig; never exceed 250 psig.
• Static leak test: with the system armed, the PAK service-port gauge must read ≤ 0.5 psi for 15 minutes — this confirms the solenoid is sealing in the de-energized state.
• Activation test: on discharge command, gauge must rise to ≥ 185 psi — this confirms the solenoid opens and pressure passes through to the actuators.
• Torque values: PAK hex-fitting hose to 15 in-lbs; primary supervisory pressure switch to 75 in-lbs (the knurled-fitting PAK hose is hand-tight only — never tools).
• Test mode time-out: if the panel is left in TEST mode for more than 15 minutes, the gas valve locks out automatically until TEST is cleared. Plan service work around this 15-minute window or expect to reset the gas valve OIM §65–70.

Pros and Cons — Electronic vs. Manual / Mechanical

The choice between CaptiveAire (electronic) and a traditional Ansul R-102 / Pyro-Chem PCL / Range Guard (mechanical) is more nuanced than the marketing in either direction would suggest. Both can do the job; both have failure modes that the other does not.

Electronic detection (CaptiveAire TANK / EWC) — Pros

Supervised circuits. A cut detection wire shows up as a trouble signal on the panel and at the FACP. A mechanical fusible-link cable can be cut, kinked, or jumped and you may not find out until the next semi-annual.

No fusible-link replacement. Fusible links accumulate grease, get knocked off by hood-cleaning crews, and degrade in temperature. NFPA 96 §11.2.2 requires annual link replacement on mechanical systems — that line item disappears with electronic detection.

Self-diagnostic. Battery voltage, AC power, panel trouble, low cylinder pressure (where wired) all annunciate. Many panels have an event log that shows you the last activation, the last trouble, and the last reset.

Rate-of-rise capability. Some installations benefit from a rate-of-rise mode that catches a fast-developing wok or charbroiler fire before the 360 °F setpoint is reached.

Integration. Discharge and trouble signals tie cleanly into a building FACP, BMS, or remote-monitoring service. Owners can get push notifications.

Electronic detection — Cons

Power dependence. The control panel needs AC and a working battery. A bad battery left in service for years is the most common reason a CaptiveAire panel fails its semi-annual.

Accidental-discharge risk during service. An electronic discharge command is a wire-and-relay event. Forgetting to isolate the cylinder before commanding discharge wets the kitchen. Mechanical systems require physically pulling a manual cable to discharge, which is harder to do by mistake.

Single-vendor service chain. Pre-engineered listings + factory training mean you usually need a CaptiveAire-trained contractor. Restaurant owners with multiple sites under different suppression brands sometimes find this constraining.

More to troubleshoot. A mechanical fusible-link system has perhaps a dozen moving parts and one cylinder. An electronic system has a panel, a power supply, a battery, supervised loops, solenoids, relays, and an alarm interface. There are simply more things that can throw a fault.

Software and obsolescence. Older control-panel firmware can lose vendor support faster than mechanical parts that have been the same since 1985.

Manual / Mechanical (Ansul R-102, Pyro-Chem PCL) — Pros

Powered by a tensioned cable and a soldered link — once installed, the system has no electrical dependency. It will discharge in a power outage, in a flood, in an earthquake. No batteries to fail. No firmware to update. Fewer fault modes during a quiet period. Service is fast: a kitchen-suppression contractor with any UL 300 license can usually work on it.

Manual / Mechanical — Cons

Annual fusible-link replacement is non-negotiable, and it adds labor cost over a 10-year horizon. Detection is heat-only at the link rating; no rate-of-rise. There is no supervised loop — a damaged cable or cut detection line is invisible until the next service. Trouble or discharge signals to the FACP exist only if you add a separate microswitch, and that signal still doesn't tell the panel why.

Practical Inspection Tips

Read the system tag first. A CaptiveAire tag should identify the exact system family (TANK, CORE, EWC), the cylinder serial, the manufacture date, and the hydro due date. A tag that just says “CaptiveAire” is incomplete — flag it and ask for the OIM model number.

Check the panel battery voltage under load. An open-circuit reading on a fresh meter is meaningless — a depleted battery reads almost full at no load. Drop the AC and confirm the panel runs alarm-loaded for the listed duration.

Verify cylinder isolation before any discharge command. Put eyes on the actuator, verify the safety pin is installed (TANK / EWC) or the water valve is closed (CORE), then issue the discharge command from the panel.

Watch the gas valve close. When the panel discharges, the gas valve solenoid should drop. If you don't see (or hear) the valve seat, the interlock isn't doing what NFPA 96 §10.4 requires — even if the agent cylinder fired correctly.

Look at the spray bar (CORE). The continuous bar behind the filters has small orifices that can clog with grease or paint overspray during hood cleaning. Check that all orifices are clear at every semi-annual.

Verify the Class K extinguisher. NFPA 10 §6.6 requires a Class K portable within 30 feet of the cooking equipment. A current annual tag, mounted at the right height, with intact tamper seal — same rules as any other portable.

Document with photos. Pre-discharge photo, control-panel display, post-test reset confirmation, gas-valve photo. Time-stamped photos protect both the technician and the owner if the AHJ or insurance ever asks what was done.

Common Field Problems

“System trouble” for months without action. The panel is shouting; nobody is listening. Ask the kitchen manager to walk to the panel and read the display while you watch. If they don't know what the lights mean, that is a training gap and a finding.

Battery older than 5 years. Sealed lead-acid panel batteries last 3–5 years. A battery dated 2018 in a 2026 panel is an open finding even if it currently passes the load test.

Detector clogged with grease. A 360 °F snap-disc covered in baked-on grease is slower than the listing assumed. Clean detectors at every semi-annual; replace if discolored or sluggish.

Gas-valve solenoid wired backwards. Held closed instead of held open. The system would discharge correctly but the valve wouldn't shut on power loss — failing the NFPA 96 §10.4 requirement. Always confirm fail-safe direction at commissioning AND at every service.

Manual pull station blocked. A pull station obscured by a stockroom rack or a stand-up freezer is a finding even if it physically still functions.

CORE water pressure low. A facility that lowered the building water-pressure setpoint to save on plumbing wear can drop a CORE system below its design pressure without anyone noticing. Verify pressure at every service and at any building plumbing change.

Where CaptiveAire Fits in the Bigger Picture

CaptiveAire is not a replacement for fire department response, building sprinklers, or a Class K portable extinguisher. It is one layer in the kitchen fire-safety stack: hood + grease filtration + automatic suppression + portable extinguisher + occupant evacuation + fire-department response. The electronic-detection design choice mostly affects the speed and the supervisory oversight of layer three (automatic suppression). It does not change the requirements for the other five layers.

The strongest case for CaptiveAire is in new builds where the hood, the duct, the make-up air, and the suppression are all engineered as one integrated factory package — that single-vendor coordination genuinely produces cleaner installs and fewer field surprises. The strongest case against CaptiveAire is in retrofit jobs where existing hood, fans, and gas-valve infrastructure are from other manufacturers and the only piece changing is the suppression head — a traditional mechanical UL 300 system is often a faster and cheaper install in that scenario.

Whichever side of that decision an owner lands on, the field-inspector job stays the same: read the tag, exercise the detection, isolate before commanding discharge, verify the gas valve drops, photograph the panel, and document the cycle on the tag.

Frequently Asked Questions

References