26
CPSC NEISS Data 2020–2024

Combination Fire/smoke Alarm And Carbon Monoxide Detector

Twenty years of CPSC NEISS emergency-room records for this consumer product category, combined with demographic breakdowns, multi-year injury trends, and matching recall notices.

Home Heating & Cooling Equipment · CPSC Code 714

No trend data

The verdict

Combination Fire/smoke Alarm And Carbon Monoxide Detector carry a danger score of 26/100 (low risk), driven by roughly 127 ER-treated injuries a year that are stable over the most recent five-year window.

26/100
danger score (low risk)
127
ER visits per year (avg)
8.3%
end in hospital admission
15-24
most-injured age group

Every figure is rendered from the CPSC NEISS record for product code 714 - last data year 2024.

PlainSafety danger score

0/100100/10026/100
PlainSafety danger score

Source: CPSC NEISS danger-score model As of 2024

How this 26/100 score is built

The score is computed from four CPSC-derived factors for combination fire/smoke alarm and carbon monoxide detector - no opinion, no editorializing:

  • Injury volume127 ER visits/yr
  • Severity (hospitalization rate)8.3%
  • Fatality rate0.00%
  • 5-year trendN/A

See the full methodology for the exact weighting of each factor.

What the CPSC Data Shows

Combination Fire/smoke Alarm And Carbon Monoxide Detector (CPSC product code 714, in the Home Heating & Cooling Equipment category) generate an estimated 127 emergency-room visits every year in the United States, adding up to roughly 506 ER-treated injuries across the 5-year span from 2020 to 2024. PlainSafety derives a danger score of 26/100 for this category (low risk), combining raw injury volume, demographic reach, severity of outcome, and multi-year trend. The five-year trajectory shows that injury counts are stable over the most recent five-year window, with the busiest year on record being 2023 (247 estimated ER visits) and the quietest 2020 (16 estimated visits).

The single most common ER diagnosis for combination fire/smoke alarm and carbon monoxide detector is anoxia to the all parts body, accounting for approximately 336 visits across the 20-year NEISS window, followed by laceration to the ankle (77 cases). The 15-24 age group absorbs the largest share of injuries, about 187 cases over the NEISS window, and females appear slightly more often than the opposite sex in that cohort. Severity outcomes from the NEISS disposition field show that 8.3% of ER visits involving this product end in hospital admission or transfer.

Beyond the hospital-sampled NEISS projections, this page also aggregates 80 consumer incident reports filed directly on SaferProducts.gov, plus 5 anonymized ER narratives - together forming a layered picture of how combination fire/smoke alarm and carbon monoxide detector fail in real households. Every figure on this page comes from CPSC-published data: NEISS projects national estimates from a probability sample of about 100 U.S. hospital emergency departments, while SaferProducts.gov collects voluntary reports from consumers, manufacturers, and clinicians. The danger score, trend indicators, and demographic breakdowns update automatically when CPSC releases a new yearly NEISS file, which is why this page is dated 2024-12-31. For regulatory context, consult CPSC recall notices and the SaferProducts.gov public database linked below.

127
Injuries / Year
8.3%
Hospitalization Rate
0.00%
Fatality Rate

Annual Injury Estimates (2020–2024)

0100200300 2020202220232024 83
Estimated annual emergency-room visits for Combination Fire/smoke Alarm And Carbon Monoxide Detector, CPSC NEISS

Source: CPSC NEISS national injury estimates As of 2024

Source: CPSC NEISS national estimates CPSC NEISS national estimates Injuries represent ER-treated cases only

Who Gets Injured?

Age Group Male Female Total
0-4 0 77 77
5-14 105 0 105
15-24 93 94 187
25-34 0 28 28
35-44 0 17 17
55-64 17 77 94

Most Common Injuries

Body Part Diagnosis Est. Injuries
All Parts Body Anoxia 336
Ankle Laceration 77
Ankle Other 77
Eyeball Other 17

Severity Breakdown

Treated/examined And Released 91.1% (462)
Treated And Transferred 5.5% (28)
Left Without Being Seen 3.4% (17)

ER Visit Narratives

Real anonymized emergency room reports from the CPSC NEISS database.

Age 18 · Male · All Parts Body · Anoxia · 2024

18YOM PRESENTS FOR CARBON MONOXIDE POISONING. SMOKE DETECTOR WAS ALARMING ON 2D PTA, BATTERIES REPLACED BUT CONTINUED TO ALARM, SO DISCONNECTED THE SMOKE/CO DETECTORS. PATIENT FELL WHILE WALKING TO THE BATHROOM. CARBOXYHEMOGLOBIN IS 17.3. DX: ACCIDENTAL EXPOSURE TO CARBON MONOXIDE, DIZZINESS, HEADACHE

Age 32 · Female · All Parts Body · Anoxia · 2024

32YOF WAS IN A HOUSE WHERE THE COMBINATION SMOKE/CARBON MONOXIDE DETECTOR WAS BEEPING,STATES SHE IS NAUSEOUS, CARBOXYHEMOGLOBIN LEVEL OF 4.4, FIRE DEPARTMENT WAS AT THE HOUSE TO INVESTIGATE IT DX: CO EXPOSURE

Age 5 · Male · All Parts Body · Anoxia · 2024

5YOM WAS IN A HOUSE WHERE THE COMBINATION SMOKE/CARBON MONOXIDE DETECTOR WAS BEEPING, HE HAS NO SYMPTOMS, CARBOXYHEMOGLOBIN LEVEL OF 3.4, FIRE DEPARTMENT WAS AT THE HOUSE TO INVESTIGATE IT DX: CO EXPOSURE

Age 2 · Female · All Parts Body · Anoxia · 2023

2YOF PRESENTS TO ED FOR MEDICAL SCREENING.. HX FROM PTS FATHER. PT FATHER WAS COOKING BACON WHEN HE INADVERTENTLY BURNED BACON. PT ATTEMPTED EXTINGUISH THE FIRE W/ WATER. COMBINED SMOKE ALARMA DN CARBON MONOXIDE DETECTOR ALARMED. PT FATHER SAID EXPOSED FOR 5 MINUTES OR FEWER. CARBOXYHEMOGLOBIN READING BY FIRE DEPARTMENT WAS 8. DX: ENOCOUNTER FOR MEDICAL SCREENING EXAMINATION

Age 59 · Male · Eyeball · Other · 2023

59YOM WAS CHANGING A SMOKE DETECTOR WHEN A ROCK FELL INTO HIS EYE, PT REPORTS PAIN AND BURNING SENSATION. PT LWBS, NO DX

Consumer Incident Reports

Reports filed by consumers on SaferProducts.gov.

9/9/2022 · No Incident, No Injury · UTC Fire & Security · Virginia

Kidde Smoke and Carbon Monoxide alarms fail reporting false positives at a near 100% rate. I have had at least 5 of these units fail in my house over the past 4 years. These are very expensive units, approx $50 each, and I have at least 5 locations in my home with units installed. These units fail at random, reporting false positive results at complete random times, most recently this morning at 2 am. The only recourse is to permanently disable the unit, following the instructions on the back of the unit, as if this exact event is not only not surprising but expected by the manufacturer. This has resulted in, best case scenario waking up my entire family in the middle of the night hearing a fire alarm, to the more extreme of a full fire department response and searching of the house, wasting time and resources for this garbage, expensive product. Just searching your database, this appears to be a frequent occurrence for this product, despite the company calling it "rare." I have previously contacted the company about this problem, and they have replaced the units at no cost. However when the products continue to fail, they question the install location, the environmental causes and anything else to deflect responsibility, despite the product apparently working perfectly fine at first. And that leads me to my most important concern, does this product even work at all? I have no way of knowing and absolutely zero confidence that it will report accurate positive warnings when it fails so reliably reporting false positives. Get this garbage product off the market before it kills people. And please spare me the indignity of responding to this complaint with this standard word soup that can be found throughout this database: "It is Kidde’s mission to help protect people and property from fire and its related hazards. We are committed to engineering and manufacturing quality products, which is why all of Kidde’s products meet or exceed the strict third-party s

9/7/2022 · Incident, No Injury · UTC Fire & Security · Montana

On several occasions over the last couple months I have been experiencing multiple false fire alarms and fire alarms chirping. I have replaced batteries in every smoke alarm twice in the last month, cleaned every smoke alarm at least once and some 2 and 3 times but I am still having false alarms and alarms chirping. After reviewing the ratings on the Kidde website for this combination smoke and carbon monoxide alarm it appears there is a wide spread issue with what I am experiencing, false alarms and chirping alarms. In the last 2 weeks my family and I have been woken up in the middle of the night with 2 false alarms, i.e. several loud beeps followed by "FIRE, FIRE, FIRE" several times and then repeated and there was not a fire. We have "experienced" 5 times in the last 2 weeks were 1 of 2 different alarms was chirping. Out of the 7 fire alarms I have installed in the house, 2 have triggered false alarms and 2 have been chirping, one of which also triggered a false alarm. It appears that I have at least 3 bad fire alarms out of the 7. After contacting Kidde this morning they said they will provide me with 3 new alarms to replace the ones I have been having issues with. The part that really makes me mad is they said it will take 10 to 15 days or possibly more and when I asked them what I should do until the new alarms arrive I was advised to remove the troublesome alarms by disconnecting them from the house power and remove the batteries. Doing this would remove the ability to possibly detect a fire in these locations with the smoke alarms removed!!! That is if they even work.

9/6/2025 · Incident, No Injury · BRK Brands, Inc · Massachusetts

Combination smoke/CO2 alarm alerts with multiple false positives. Replaced units multiple times and issue is ongoing. Other brand unit, [REDACTED], does not alert same location.

9/4/2020 · Incident, No Injury · Nest Labs, Inc. · Tennessee

My Nest Protect suddenly notified me through the app that the battery was low and needed immediate replacing. Soon after the notification on my phone, the product started beeping to signal a low battery. I waited about 10 minutes before going downstairs to remove it. I didn't have any alkaline batteries (which the app recommends) so I just removed the existing batteries (which were the original ones that came with the product). When I removed the batteries, I smelled a burning smell and the batteries were extremely hot - far too hot to hold in my hand. I am concerned about the potential fire hazard (these certainly felt hot enough to spark a blaze) if I hadn't been at home at the time to remove the batteries.

9/29/2023 · No Incident, No Injury · Nest Labs, Inc. · Massachusetts

Google Nest Smoke / CO2 detector started beeping about once per minute. I took it down and batteries were burning hot, almost untouchable. Very dangerous!!

9/28/2021 · Incident, No Injury · Nest Labs, Inc. · California

On Sunday, September 26, I was awakened early in the morning by the chirping of my Nest Protect smoke detector. I had not received any warnings in the Nest app that the batteries were low. The batteries are the Energizer lithium that came with the unit. Three of the six batteries were too hot to touch. I removed the batteries from the detector and put them outside, and have stopped using the detector. This Protect is a second-generation unit manufactured on September 14, 2017, and the serial number is 06AA01AC371703AE. I have four other Nest Protects in my home and am concerned about them having the same issue. I bought these devices to protect my home against fire, not start fires.

9/27/2024 · Incident, No Injury · UTC Fire & Security · New Jersey

Kiddie P4010ACSCO_w_2581 products keep giving false fire alarms. When you start digging into online reviews a lot of others are also complaining about the same thing. The other odd thing is its always in the middle of the night around the same time at least for me. but others have noted the same issues. I've had two back to back nights of false alarms... but its happening at least once a month randomly. I've followed the directions as well on how to clean them from Kiddie doesn't seem to help. I've swapped alarm placement to see if that helps no luck. UPDATED ON 9/30/2024: [Update to my ticket. Yet another false alarm. That's three days in a row. Before you can do anything the alarm will go off say fire then before you could even hush it it stops like nothing ever happened. Absolutely horrible this product allowed to be installed. ]

9/2/2025 · Incident, No Injury · UTC Fire & Security · Washington

We installed (as code required) interconnected smoke/CO detectors in our new build (built in 2024)home. The products are Kidde Model 30CUAR and CUACFEX. To date we have had 4 of the units fail (an approximately 50% failure rate) with a mean time between failures of about 2 months. Seems like an unreliable and unsafe product to have in a code required safety applications

Showing 8 of 80 reports.

Product Recalls

Search for active and past recalls related to combination fire/smoke alarm and carbon monoxide detector on the CPSC website.

Frequently Asked Questions

How dangerous are combination fire/smoke alarm and carbon monoxide detector?

Based on 20 years of CPSC data, combination fire/smoke alarm and carbon monoxide detector have a danger score of 26/100 (low risk). An estimated 127 ER-treated injuries occur annually in the U.S. related to this product category.

What are the most common injuries from combination fire/smoke alarm and carbon monoxide detector?

The most common injury is anoxia to the all parts body, accounting for approximately 336 injuries over 20 years.

Are injuries from combination fire/smoke alarm and carbon monoxide detector increasing or decreasing?

No trend data.

Who is most at risk for combination fire/smoke alarm and carbon monoxide detector injuries?

The 15-24 age group accounts for the most injuries, with approximately 187 cases recorded over 20 years. Females are more frequently injured in this age group.

What happens when someone is injured by combination fire/smoke alarm and carbon monoxide detector?

Of all ER visits involving combination fire/smoke alarm and carbon monoxide detector, approximately 8.3% result in hospital admission. The majority of patients (91.7%) are treated and released from the emergency department.

How can I report a safety problem with combination fire/smoke alarm and carbon monoxide detector?

You can file a consumer incident report at SaferProducts.gov, the official CPSC reporting portal. Reports help the CPSC identify emerging hazards and trigger investigations or recalls. You can also call the CPSC hotline at 1-800-638-2772.

Safety Guides

What this means for you

Treat the 26/100 score as relative risk between products, not your personal odds of injury.

  • See where this category ranks against every other tracked product. Full rankings
  • Injuries cluster in the 15-24 age group, take extra care if that describes your household.
  • Check for active recalls on this product before you assume it is safe. CPSC recalls

NEISS estimates ER-treated injuries from a national probability sample of hospitals; they do not capture injuries treated elsewhere or not treated at all.

Data: CPSC National Electronic Injury Surveillance System (NEISS) 2005–2024 and SaferProducts.gov consumer incident reports. Injury estimates are based on a nationally representative probability sample of U.S. hospital emergency departments. This page is for informational purposes only and is not affiliated with the CPSC.