First Alert deals

Every First Alert product we track, with the ones currently below their normal price first.

Products tracked

On sale now

Best discount

35%

Median price

$32.49

4 deals · 6 more tracked

35% off

First Alert

First Alert Hardwire Smoke Alarm | SMI100-AC, 9V Battery Backup, 1-Pack

$19.49~~$29.99~~

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Size: 1-Pack

Price checked Oct 21, 2026, 7:20 PM PDT

14% off

First Alert

First Alert Fire Extinguisher, Heavy Duty for Home & Commercial Use | HOME2PRO Rechargeable Compliance Unit, UL RATED 2-A:10-B:C, Red, 1-Pack

$42.98~~$49.99~~

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Size: 1-Pack

Price checked Oct 21, 2026, 7:22 PM PDT

5% off

First Alert

First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm | SMCO600NV

$122.39~~$129.99~~

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Size: 1 Count (Pack of 1)

Price checked Oct 21, 2026, 4:42 PM PDT

20% off

First Alert

First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm | SMICO100-AC, 9V Battery Backup

$51.50~~$64.99~~

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Size: 1-Pack

Price checked Oct 21, 2026, 6:24 PM PDT

Below: not currently discounted — showing everything we track

These sit at or above their own normal price. We keep them here so you can see the current price and decide whether to wait.

First Alert

First Alert Battery Carbon Monoxide Alarm | CO400

$21.99

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Size: Pack of 1

Price checked Oct 21, 2026, 7:21 PM PDT

First Alert

First Alert Battery Smoke Alarm | SMI100, 2-Pack

$29.99

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Size: 2-Pack

Price checked Oct 21, 2026, 9:25 PM PDT

First Alert

First Alert Battery Smoke Alarm | SMI100, 1-Pack

$16.99

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Size: 1-Pack

Price checked Oct 21, 2026, 9:34 PM PDT

First Alert

First Alert Battery Combination Smoke & Carbon Monoxide Alarm | SMCO100

$36.99

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Size: 1-Pack

Price checked Oct 22, 2026, 12:34 AM PDT

First Alert

First Alert Plug in Carbon Monoxide Alarm | CO606, 9V Battery Backup

$23.99

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Size: 1-Pack

Price checked Oct 21, 2026, 3:51 PM PDT

First Alert

First Alert Battery Carbon Monoxide Alarm | CO400

$34.99

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Size: Pack of 2

Price checked Oct 21, 2026, 6:02 PM PDT