Inside your main breaker box. Open the panel door, peel off the 3M backing and press it onto the inside wall or inside the door. It also works in a sub-panel, behind the dryer, in a battery or e-bike charging cabinet, in a media cabinet or under the car hood.

No. There's no wiring and nothing to connect. If you can open your breaker box door, you can install it in about 30 seconds. Never remove the inner cover of your panel.

Yes. It uses a low-corrosion aerosol made for electrical equipment. It is designed to put the fire out without damaging the wiring around it.

It only activates when the heat around it reaches about 340°F. Normal room, attic or garage temperatures (from -58°F up to 194°F) will not set it off.

No. Keep them. Panel Guard adds the one thing they can't do: put out a fire inside the box automatically, even when nobody is home or everyone is asleep.

Up to 10 years with no maintenance, no batteries and no refills. Once it has activated, replace it with a new one.

One per enclosed space. Most families start with three: the main breaker box, behind the dryer and the garage or car.

Orders ship within 1–2 business days and usually arrive within 8–12 business days. Shipping is free on 2 or more units. You'll get a tracking link by email.

You're covered by our 30-day money-back guarantee. Email us within 30 days of delivery and we'll refund you in full.