Smoke and carbon monoxide alarms detect co I don't think it common to have a co2 sensor in your home you should have both smoke and CO sensors I don't think I have seen any one state co2 sensors were needed in homes accept as a typo!

Good luck finding a smoke co2 sensor combo I have only herd of a smoke / co sensor combo!

do you have Omnishield where you live? if not then the Nest is the next best. Nest is good if you like smart devices. if smart devices are not important to you then having photoelectric alarms that are interconnected is all you need. place them in bedrooms, hallways, living rooms, dining rooms, offices, recreation rooms. don’t place them in unfinished attics and basements. don’t place them in the kitchen and garage.

the statement above ignores court findings which state the combination alarm is not a safer alternative to ion or photo electric will be glad to send you the report stating that 1

I honestly wish I had a Nest smoke alarm in my apartment.

I’ve heard great things but I’ve also known someone where the Nest smoke alarm didn’t sound when a fire happened and their house burned down. Luckily, they got their family out because they woke up but it could have been bad if they didn’t.

ion alarms have too many false alarms. too many false alarms mean people may not take it for a real alarm

Dual is very likely to cause false alarms.

one problem I see with the above statement is that you have an alarm made by UTC/ Kidde do you not know they did not want to honor my claim for a recalled alarm until I went on social media and left a horrifically negative review of thier company that included a reported titled Notice of Child endangmernt ?

Yea, it's recommended that you buy a dual sensor. I have a nest protect that does not have a dual sensor but it is kinda like a dual sensor.

The inly issue is whether you are able to clean the photoelectric cell or not. If there is no way to clean the photoelectric cell, then it really isn’t worth getting a combination unit.

@@BukuiZhao Nest are blue and red light photoelectric alarms - they do NOT contain an ionisation sensor!

Do you mean the other way around? Photoelectric smoke alarms only go off with VISIBLE smoke. Ionization smoke alarms only go off with FINE smoke.

Ionization alarms are good, only if u also have photoelectric alarms

@@dabitzz Yeah. I think having smoke of both, at least a couple ionization sensors are okay. One thing I wish existed for houses, is units that are only the alarm, and units that are only the sensor, and you would connect them. This way you can have detectors where you need them, since some types of ceilings need multiple on one room, or if there is a room that is more likely to have a fire, and then the alarm units would be for bedrooms.

WARNING! This is the standard smoke alarm industry's flawed rhetoric. Ionisation smoke alarms have been proven to be defective and are in the process of being eliminated globally, www.SmokeAlarmWarning.org

YOU SIR SHOULD NOT GIVE ADVICE IF YOU ARE PLEASE EXPLAIN TO ME WHY YOU THINK IONIZATION IS EFFECTIVE SINCE THE Texas And am report state this has over 50% failure in smoldering fires and where it better in flaming it has about 20 % families is un reasonable and I'll ogicall to tell someone to buy a product that has a high rate of failure! Don't you know almost 100 % of all law suits are against ionization? Photo electric has an approximate failure of 4 % for both smoldering and flaming fire and a actually my former business consultant is on the standards technical panel at 217 he actually made full scale test video showing that ionization alarm can fail at an hour and wrote a book about his experience with one failing at 2 hours since you insist on giving advice please provide me with an explanation why I told you the above and you think is make sense to buy a defective alarm!

What you for got to add is I think the reason most fires are fatal is most smoke alarm are ionization which the Texas A& M report said it has over 50% failure in smoldering fires! That probably why the smoke alarm did not work available data states they can fail at an hour or more! Photo electric alarms have failure of about 4% for both smoldering and flaming fires! While ion is supposedly better in a flaming fire still Has failure rate of about 20% in flaming and over 50 in smoldering also did you ever wonder why almost 100% of all law suits are against the ionization type and there are very few photo electric law suits?

@@FredenglePhoto electric sensors are always advertised as minimizing false alarms - its not true. Photo electric alarms are actually more sensitive. I had only ionization for 8 years - never a single false alarm. We switched to photoelectric - false alarms every few months.

dont you know ionization alarms are unsafe texas a &m has made a fault analysis report and its also proven in full scale tests that ionization alarms fail during smoldering fires the above statment one of each type is not correct in fact there are some jurisdictoins that have mandated photo electric only ionization failure rates are higher than photo electric failure rates I dont as for the false alarm rate thing its distrubing you want to make that claim and dont have evidence to back that up there was an alaskan study that showed photo vs ion the only photo was disabile was to power a toy robot and ions were frequently disbabled if your interested will be glad to try to send you a copy if you can send me your email of the report you want to make that state ment that I challanage you show me a study to back up that claim !!! I will do my best to send to any one who wants to read it the TExas A And M study on alarms fault analsiys and if your so sure you are right I challange you to answer me how come its been stated that I would be willing to bet you 25 dollars that if you ask any litgation attorney they will say they do not have a single case where a photoelectric alarm has been blames for a death ? ( I mean do you not know that has been aruged 100% of all lawsuits are from ionization technology ) could that because becasue the alarms which people want to claim work that 90 % have dont work properly in smoldering fires ? you apparently have not seen this report from gma kzfaq.info/get/bejne/Y6iqq8ifqK3MeKc.htmlsi=rypOLJggCKkFmQEU ionization alarms must be be banned ! even a member of UL 217 went to Australia and he said ionization alarms should not be used !!! you want the speech on that give me your email I send it to you !

Where i live most smoke alarm manufacturers have moved away from ionisation detectors And the regulations where i live promote the use of “multi sensor” detectors, which have both photoelectric and heat detectors in them (and in kitchens here, a heat detector would be fitted, smoke detectors are not permitted in kitchens where i live)

so you are say photo electric is better?

@@mrstyxxx Hi please see my comments below !

Yes definitely photo it better ionization has over 50% failure in smoldering fires In flaming fires where is is supposedly better it has about 20% failure either of those are unable acceptable when photo electric has a low failure rate for both smoldering and flaming fire of 4%

what people are forgeting I is I think the usuall reason for no working alarm is that it was an ionization that got disbabled because it goes off everytime the person cooked photo electric alarms are less liklely to be disabled there are studies that back this up as for 10 year alarms do you not know that the cdc came out with a report that says 10 year alarms do not last 10 years ??