Nynli PanelGuard Pro™
Nynli PanelGuard Pro™
See What Homeowners Are Saying
The thing that sold me: nothing plugs into it. A fire that trips the main can't switch it off.
1187 Comments
Been in six weeks. Hasn't done anything, which is exactly what I paid for.
23714 Comments
We were away three weeks in Portugal and I genuinely didn't think about the panel once. First holiday like that in years.
34921 CommentsEvery Box That Can Start a Fire
Why Homeowners Choose NYNLI
Both look at your panel. Only one is still there at 3am.
Frequently Asked Questions
?Does it need power or a battery to work?⌄
No. Nothing connects to it. The unit is triggered by heat alone — at 338°F, or on contact with open flame, it fires itself. That is deliberate: a fire that kills the panel it is sitting in cannot switch it off.
?What if it goes off when nothing is wrong?⌄
It won't fire from a warm panel. A hard-working breaker box runs around 100–120°F; the trigger point is 338°F, roughly three times hotter than a panel ever gets under normal load. It sits happily in ambient conditions from -58°F to 194°F without reacting.
?Will the spray damage my breakers or wiring?⌄
No water, no foam, no liquid. It releases a dry aerosol that smothers the flame chemically and settles as a fine powder. Wipe the residue off with a dry cloth once the panel has cooled and been isolated.
?Does this replace my smoke alarm?⌄
No, and don't treat it as one. Keep every smoke alarm you have. This covers one blind spot they can't: a fire inside a closed steel enclosure, where the smoke has to escape the box and cross a room before a ceiling detector hears about it. This unit is already in there.
?Will it fit an American breaker panel?⌄
Yes. It's 3 x 2.5 x 0.7 inches and clips onto standard 35mm DIN rail, or sticks to any flat inside surface with the 3M pad already on the back. In panels without a rail, most people mount it to the inside of the door. The blue heat-sensing cord then runs down across the breaker tops and the lugs — the parts that actually get hot. It's built to EN 15276 and carries CE marking, not a UL listing.
?Can I install it myself?⌄
Most people do, and it takes about five minutes. Kill the main breaker first. Clip the unit to the rail or press it onto a clean flat surface, then lay the blue cord across the breaker tops without pinching it. One thing to be straight about: in a main service panel the incoming lugs stay live even with the main off. If that sentence makes you uneasy, have an electrician set it — it's a fifteen-minute job for them.
?How long does it last, and what happens after?⌄
Ten years sealed, with nothing to check in between — no pressure gauge, no annual service, no recharge. Write the install date on the white strip on the front. After ten years you swap in a new one. If it ever fires, that unit has done its job and gets replaced.
Try It Risk-Free for 30 Days
If the PanelGuard doesn't go in without a single wire and leave you calmer about the box in your garage, send it back for a full refund — no questions asked.
Plus, every unit comes with a 1-year manufacturer warranty.
If anything breaks, we replace it free.
ADD TO CARTSee it fire for itself
Real fire test — no cuts, no edits
Customer Reviews
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Mounted in a 200A Square D with room to spare. The blue cord reaches all the way across the breaker tops without stretching. Took the cover off, clipped it on, done in about six minutes.
Been in six weeks. Hasn't done anything, which is exactly what I paid for.
No rail in my panel so it went on the inside of the door with the pad on the back. Garage hits 105 in August and it hasn't budged.
Ordered three. Main panel, garage sub, and the well pump box which nobody ever looks at.
My husband put one in before we left for two weeks. First trip I didn't ask him to check the breaker box before we locked up.
Panel is from 1978 and two of the lugs run warm under load. I know that's the thing that eventually goes. Now there's something in there when it does.
Smaller than I expected from the pictures. Sits beside the breakers like it belongs there.
Unit is solid and went in fine. Box turned up dented on one corner though, and it took eleven days. Product's good, shipping wasn't.
Been an electrician nineteen years. Fitted these in commercial cabinets for a decade. Nice to see one priced for a house.
Fitted one in the main and one in the sub. The cord took longer to route neatly than the unit took to mount.
Landlord here. Four units, four panels, four of these. Cheapest thing on my maintenance list this year.
RV sits in storage most of the year and nobody is near it. That box worried me more than anything in the house.
Wrote the install date on the white strip on the front like the instructions say. Set a phone reminder for 2036 and forgot about it.
Watched the test footage about four times before I believed nothing was wired to it. Bought two the same night.
Not a replacement for smoke alarms, and they say so on the page themselves. That's the reason I trusted the rest of it.
Bought it for my father's place. He's seventy-eight and would never notice a burning smell coming from the basement.
Quoted three hundred and forty dollars to put arc-fault breakers across the whole panel. This was thirty and it went in myself.
No wiring was the whole selling point for me. I'm not licensed and I wasn't paying someone two hundred to fit a thirty dollar part.
Laundry room panel, right next to the dryer. Lint and a warm terminal is a combination I'd rather not test.
Read the page twice looking for the catch and couldn't find one. Ended up with three.
