# Kidde Smart Smoke + Carbon Monoxide Alarm

- Source: https://stierproducts.com/products/kidde-smart-smoke-carbon-monoxide-alarm
- Category board: https://stierproducts.com/categories/smoke-detectors
- Placement: #4 of 10 in Smoke Detectors, B tier
- Brand: Kidde
- LP on this board: 609
- Last researched: 2026-08-07T04:20:53.545Z
- Method: https://stierproducts.com/methodology
- Dataset: https://doi.org/10.5281/zenodo.22062813 - every board at once, one dated snapshot per release, same licence, prices and photographs left out
- Reuse: Text, rankings, tier assignments, LP values and verdicts are free to quote and reuse with attribution to stierproducts and a link to the source URL (CC BY 4.0: https://creativecommons.org/licenses/by/4.0/). Product photographs are not covered: they belong to their respective owners and are reproduced to illustrate the product being reviewed. Do not redistribute them under this licence.

## Verdict

Positive by comparison to alternatives, but lacking direct endorsement.

## For

- Positive sentiment compared to other brands
- Wi-Fi connectivity
- Voice alerts
- Highest reliability rating
- Regular firmware updates

## Evidence

Consolidated from 5 cited sources across 4 outlets

| Outlet | Said by | Stance | Link | Link status |
| --- | --- | --- | --- | --- |
| Wirecutter | - | - | https://www.nytimes.com/wirecutter/reviews/best-smart-smoke-alarm/?eafs_enabled=false | fetched and confirmed |
| CNET | - | B | https://www.cnet.com/home/security/best-smoke-detector/ | fetched and confirmed |
| Consumer Reports | - | - | https://www.consumerreports.org/home-garden/smoke-carbon-monoxide-detectors/best-smoke-and-carbon-monoxide-detectors-of-the-year-a9237799621/ | fetched and confirmed |
| Wirecutter | - | - | https://www.nytimes.com/wirecutter/reviews/best-smart-smoke-alarm/ | fetched and confirmed |
| r/smarthome | - | B | https://www.reddit.com/r/smarthome/comments/1vca5id/smoke_co_alarm/ | outlet blocks automated checks |

## Nearest alternatives on this board

| Rank | Product | Tier | Page |
| --- | --- | --- | --- |
| 1 | First Alert SM300-AC | A | https://stierproducts.com/products/first-alert-sm300-ac |
| 2 | Kidde Detect Smoke + Carbon Monoxide Alarm | A | https://stierproducts.com/products/kidde-detect-smoke-carbon-monoxide-alarm |
| 3 | First Alert SM500V Interconnected Battery-Operated Smoke Alarm with Voice Alerts | B | https://stierproducts.com/products/first-alert-sm500v-interconnected-battery-operated-smoke-alarm-with-voice-alerts |
| 5 | First Alert SMCO500V Interconnected Battery-Operated Combination Smoke & CO Alarm with Voice Alerts | B | https://stierproducts.com/products/first-alert-smco500v-interconnected-battery-operated-combination-smoke-co-alarm-with-voice-alerts |
| 6 | First Alert SM500V Interconnected Battery-Operated Smoke Alarm | C | https://stierproducts.com/products/first-alert-sm500v-interconnected-battery-operated-smoke-alarm |
| 7 | Kidde Smart Smoke + CO (Z-Wave) | D | https://stierproducts.com/products/kidde-smart-smoke-co-z-wave |
| 8 | First Alert SMCO210V Battery-Operated Combo | D | https://stierproducts.com/products/first-alert-smco210v-battery-operated-combo |
| 9 | First Alert Z-Wave Smoke Detector | D | https://stierproducts.com/products/first-alert-z-wave-smoke-detector |
| 10 | Kidde Ring Smart Smoke Alarm | F | https://stierproducts.com/products/kidde-ring-smart-smoke-alarm |

The full board is at https://stierproducts.com/categories/smoke-detectors.

## What this tier means

- B: Good. A solid choice with real caveats worth knowing.

## How to read this

- Each category is researched in four independent runs, one per lens (expert consensus, value, reliability, community pulse). Every run ranks a board of candidates that deliberately includes products buyers cross-shop but should avoid. Placements score on a ranked ladder (LP), and tiers are derived from LP, so no tier is ever assigned by hand.
- LP is this product's points on its own category ladder. It is comparable within a category and not across categories.
- Link status reports what our pre-publication link check found when it fetched the cited URL. It says nothing about the quality of the review.
- A citation with no usable link is listed rather than dropped, and is excluded from the counted total above.

## Image

https://stspimgdevmfyk46r5vwkay.blob.core.windows.net/images/products/kidde-smart-smoke-carbon-monoxide-alarm.webp

Product photographs are not covered: they belong to their respective owners and are reproduced to illustrate the product being reviewed. Do not redistribute them under this licence.