What a silent alarm does and does not prove · review
The default CO alarm: a simple 9V battery model with 22,134 ratings at 4.6 out of 5, with almost nothing written on the listing.
First Alert’s page gives a model number, a 9V battery, an electrochemical sensor and little else. Its 22,134 ratings say more than its text.
A home CO alarm is built to hold off at low levels: see our UL 2034 page for the alarm windows. A silent alarm does not prove the air is free of CO.
If the alarm sounds, get everyone outside to fresh air and call 911 or the fire department from there. Check the replace-by date, and follow the manual and your local code on where to mount it.
| Power | 9V battery, included |
|---|---|
| Sensor | Electrochemical |
| Weight | 7.2 oz |
| Operating humidity | 10 to 95% RH |
| Display | None published |
| Standard | Not named on the listing |
| Amazon reference | B000N8OYXI |
| EAN | 0029054000699 |
The listing says the date shown is the manufacture date, which identifies when the product was produced.
No. It runs on a 9V battery.
8.3/ 10
A plain, proven alarm. For a wood stove, we would add a display model as well.
This model is listed on Amazon.com, at ≈ $22 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
Details checked on November 14, 2026.
A second alarm near a stove or in a bedroom, on a budget.
Amazon reports what buyers took in the month before this page was last checked: at least 5,000.
The figure is a floor, rounded by Amazon, — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for wood heating equipment and the matching Amazon product page. Prices, ratings and availability: read on Amazon.com from a New York address. Every figure on this page names its source.
Same shelf, closest price — what the same spend else heats.
2 AA batteries · electrochemical · 85 dB · LEDs · Event Memory · portable
A small AA alarm with Event Memory, which records the last time it detected CO, with 2,356 ratings at 4.7 out of 5.
Best for: A cabin or travel alarm, or a second alarm at home.
≈ $25
plug-in · 9V backup · digital display · 85 dB · 3rd edition
The older Kidde plug-in with a digital display, a 9V backup and 28,356 ratings at 4.7 out of 5.
Best for: A buyer who trusts a long record over a newer model.
≈ $70
AA battery · UL 2034 5th Edition stated · ETL listed · 85 dB · test/hush · 10-year limited warranty
The newer Kidde alarm, which names the UL 2034 5th Edition and carries a 10-year limited warranty.
Best for: A buyer who wants the standard named in writing.
≈ $25
The price beside each product is fetched as this page opens, and it is the only figure here that is current. Any amount written into the prose was read once, on the day that sentence was written, and nothing has refreshed it since.
