How do I tell if my kitchen hood system is Ansul or Kidde?

Read the metal nameplate on the agent cylinder and the control head. Ansul restaurant systems are commonly marked R-102 or Piranha. Kidde restaurant systems are commonly marked WHDR or Kidde wet chemical. Photograph both plates if the paint is faded. Do not guess from nozzle color alone.

Why does the brand matter when I hire an inspector?

Fusible links, nozzles, agent, cartridges, and control-head parts are listed to a specific manufacturer’s system. Many jurisdictions expect the technician to be factory-trained on the brand they service. An Ansul-authorized shop may not stock Kidde parts, and the reverse is also true.

What if I cannot read the nameplate?

Do not schedule based on a guess. Photograph the cylinder, the control head, and any remaining decals and send them to the inspector. They can often identify the system from those photos. If the plate is gone, the original install drawings or the last inspection report may still name the brand.

Is Ansul better than Kidde?

This guide does not compare performance, price, or “best” specs. Both are UL 300 wet-chemical kitchen systems. The job is to identify the system you already have so the six-month inspection is done with the correct parts and a technician who can service that brand.

How to Identify Ansul vs Kidde Kitchen Suppression Systems

This is not a sales comparison

HoodInspect does not rank Ansul against Kidde, quote discharge times, or invent capacity charts. Both are listed UL 300 wet-chemical kitchen systems. Wrong-brand service is a parts and authorization problem, not a marketing problem. Identify what is already installed, then book the six-month inspection.

Why the brand on the cylinder matters

Kitchen wet-chemical systems are pre-engineered packages. The agent, nozzles, fusible links, detection line, control head, and (when used) gas valve are listed together. A technician who is set up for Ansul R-102 may not carry Kidde WHDR links or cartridges. Many AHJs expect factory authorization on the brand being serviced. Hiring “anyone with a fire truck” can mean a failed inspection, a red tag, or a return visit.

Brand identification is a hiring step, the same way you would not send a sprinkler fitter to tag a kitchen cylinder. It is not a reason to rip out a working system.

Where to look first

Start at the agent cylinder — usually in a cabinet or on the wall at the end of the hood, sometimes in a closet. Then check the control head on top of or beside that cylinder. Then look for leftover paperwork.

Cylinder nameplate. A riveted or adhesive metal plate lists the manufacturer, model (R-102, Piranha, WHDR, and similar), and often a serial number and UL marking.
Control head. The mechanical or electric release on the cylinder is usually branded. Paint overspray hides this; wipe the side, not just the front.
Owner’s packet or last tag. The previous inspection tag, install drawings, or the hood manufacturer’s submittal often names the suppression brand even if the plate is greasy.
Nozzles and blow-off caps. Useful as a hint, not as proof. Do not identify a system from cap color alone — shops reuse generic caps.

Photograph the nameplate, the control head, and the existing tag. Send those photos when you request a quote so the inspector knows which truck to send.

Ansul restaurant systems

Ansul kitchen systems in the field are most often marked R-102 or Piranhaon the cylinder and literature. The company name Ansul (Johnson Controls) appears on the nameplate and usually on the control head. R-102 is a wet-chemical restaurant system; Piranha is a dual-agent restaurant system. Both still need a licensed, Ansul-capable inspector for the NFPA 17A / NFPA 96 six-month service.

If the plate says Ansul but you cannot read the model, still book an Ansul inspector and send the photo. Do not substitute a different brand’s parts.

Kidde restaurant systems

Kidde commercial kitchen systems are commonly marked WHDR or Kidde wet chemical on the cylinder nameplate and control head. Older labels may say Kidde Fenwal or a related Kidde Fire Systems product line. The letters on the plate matter more than the color of the tank.

Hire a shop that lists Kidde among the brands it services. See Kidde kitchen fire suppression inspectors. If a company only publishes Ansul authorization, ask whether they are also set up for Kidde before they arrive.

Other brands you may actually have

Many kitchens are not Ansul or Kidde. Read the plate anyway:

Range Guard (often associated with Badger) — see Range Guard inspectors.
Buckeye Kitchen Mister — listed on some HoodInspect companies as Buckeye.
Pyro-Chem Kitchen Knight II — another UL 300 wet-chemical package; authorization is separate from Ansul even when companies share a parent.
Amerex, CaptiveAire CORE, ProTex, and others — if the plate names them, hire a shop that publishes that brand. HoodInspect does not invent authorizations a company did not publish.

What to tell the inspector

When you call or email, send: city, cooking line (fryers, woks, charbroiler, etc.), photos of the nameplate and control head, and the date on the current tag if one is still attached. Ask them to confirm they are licensed in that state and authorized on that brand. Then schedule on the six-month cycle described in the six-month tag guide.

If appliances under the hood have changed since the last install, say so. Nozzle aiming is part of the inspection; a new fryer bank can put an otherwise tagged system out of compliance.

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Frequently asked questions

How do I tell if my kitchen hood system is Ansul or Kidde?: Read the metal nameplate on the agent cylinder and the control head. Ansul restaurant systems are commonly marked R-102 or Piranha. Kidde restaurant systems are commonly marked WHDR or Kidde wet chemical. Photograph both plates if the paint is faded. Do not guess from nozzle color alone.
Why does the brand matter when I hire an inspector?: Fusible links, nozzles, agent, cartridges, and control-head parts are listed to a specific manufacturer’s system. Many jurisdictions expect the technician to be factory-trained on the brand they service. An Ansul-authorized shop may not stock Kidde parts, and the reverse is also true.
What if I cannot read the nameplate?: Do not schedule based on a guess. Photograph the cylinder, the control head, and any remaining decals and send them to the inspector. They can often identify the system from those photos. If the plate is gone, the original install drawings or the last inspection report may still name the brand.
Is Ansul better than Kidde?: This guide does not compare performance, price, or “best” specs. Both are UL 300 wet-chemical kitchen systems. The job is to identify the system you already have so the six-month inspection is done with the correct parts and a technician who can service that brand.

Hire by brand and city

Search HoodInspect for a licensed inspector who lists your system brand.

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