Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


16939 posts

Uber Geek
+1 received by user: 4765

Trusted
Lifetime subscriber

Topic # 236059 16-May-2018 10:57
3 people support this post
Send private message quote this post

https://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=12052330

 

 

 

Basically, they perform so poorly, they shouldn't be sold or used in homes. 

 

IE they won't save your life, don't rely on them.

 

 


View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
4183 posts

Uber Geek
+1 received by user: 1660


  Reply # 2016724 16-May-2018 11:04
Send private message quote this post

Thanks for the heads up.

 

Aren't ionisation alarms intended for smoky locations, where photoelectric alarms would give too many false positives?  For example kitchens and workshops?

 

That's the rational I've used to choose ours, for better or worse.





Mike



16939 posts

Uber Geek
+1 received by user: 4765

Trusted
Lifetime subscriber

  Reply # 2016727 16-May-2018 11:07
Send private message quote this post

We use the NEST ones. I don't think they are certified in NZ but I trust them. 

 

We previously used two of the long life tiny little units. I can't recall their names. We had the heat ones in the kitchen and the smoke ones elsewhere. 

 

 


mdf

1764 posts

Uber Geek
+1 received by user: 499

Trusted
Subscriber

  Reply # 2016756 16-May-2018 11:45
Send private message quote this post

The ionisation ones are terrible at detecting "smouldering" files where there aren't fast moving particles or heat to deflect the ionisation stream. The smoke alarm in a fish tank seems to have been a staple of news reports for years. See for example:

 

 

Ionisation alarms are also subject to false alarms, particularly in kitchens (e.g. hold one over an active toaster or kettle and it will probably go off).

 

We've just used photoelectric smoke alarms throughout the house.


3906 posts

Uber Geek
+1 received by user: 649

Trusted
Subscriber

  Reply # 2016762 16-May-2018 12:06
One person supports this post
Send private message quote this post

I have been thinking for a while that I should replace my ionising unit with a photoelectric unit but I've been putting it off because I'm guessing the bracket won't fit the existing screw holes, which means more holes in the ceiling.

 

How do other people deal with this when replacing old smoke alarms? I assume there's no standardisation of the gap between the two screw holes in the bracket?


mdf

1764 posts

Uber Geek
+1 received by user: 499

Trusted
Subscriber

  Reply # 2016768 16-May-2018 12:13
One person supports this post
Send private message quote this post

alasta:

 

I have been thinking for a while that I should replace my ionising unit with a photoelectric unit but I've been putting it off because I'm guessing the bracket won't fit the existing screw holes, which means more holes in the ceiling.

 

How do other people deal with this when replacing old smoke alarms? I assume there's no standardisation of the gap between the two screw holes in the bracket?

 

 

Of course not! But if the existing ones are in the right place (avoiding dead spots) then the new alarm should at least cover them up. You might get lucky. There are usually a few holes in the template and you might be able to make them match. At minimum, one will line up and you only have to drill one more.

 

As an aside, it's one of my pet grumbles that smoke alarms and other small appliances only ever come with masonry anchors, which are completely unnecessary for gib walls. Our current place is littered with the things (bright red mostly) from the previous owners.


7181 posts

Uber Geek
+1 received by user: 3377

Subscriber

  Reply # 2016771 16-May-2018 12:21
One person supports this post
Send private message quote this post

alasta:

 

I have been thinking for a while that I should replace my ionising unit with a photoelectric unit but I've been putting it off because I'm guessing the bracket won't fit the existing screw holes, which means more holes in the ceiling.

 

How do other people deal with this when replacing old smoke alarms? I assume there's no standardisation of the gap between the two screw holes in the bracket?

 

 

I have never found any kind of standardisation even between different models of the same type of alarm. Every manufacturer invents its own bracket, just different enough from all the others to require new screw holes. I should have posted that in Annoyances because it is a small thing that sure annoys me. Probably the best you can do is try to reuse one of the holes and position the bracket to cover the other ones. Depending on your ceiling material, you might be able to get away with some adhesive stick-on strips to hold the alarm in place. I haven't tried them for that but they work pretty well for other things.

 

 





I reject your reality and substitute my own. - Adam Savage
 


11984 posts

Uber Geek
+1 received by user: 2079

Trusted

  Reply # 2016775 16-May-2018 12:25
One person supports this post
Send private message quote this post

Another option is if you can buy a thin circular white disk, use that as a fascia for the alarm, and as above use one existing hole for the fascia/alarm bracket and make the other which will be hidden 


13919 posts

Uber Geek
+1 received by user: 1754


  Reply # 2016823 16-May-2018 13:37
One person supports this post
Send private message quote this post

alasta:

 

I have been thinking for a while that I should replace my ionising unit with a photoelectric unit but I've been putting it off because I'm guessing the bracket won't fit the existing screw holes, which means more holes in the ceiling.

 

How do other people deal with this when replacing old smoke alarms? I assume there's no standardisation of the gap between the two screw holes in the bracket?

 

 

 

 

Although you can just cover the holes with the new alarm fixing plate. Heard people fill the holes with toothpaste instead of plaster filler.

 

 

 

In case anyone is looking for new alarms, Bunnings have a special on 10 year photoelectiric ones for just 8 dollars!. That is almost cheaper than a battery, and alarms should be replaced every 10 years anyway.  https://www.bunnings.co.nz/kidde-10-year-photoelectric-smoke-alarm_p00022465 . You can probably save by getting mitre 10 to price beat it if you are getting a house lot..


13919 posts

Uber Geek
+1 received by user: 1754


  Reply # 2016824 16-May-2018 13:40
Send private message quote this post

Rikkitic:

 

 

 

I have never found any kind of standardisation even between different models of the same type of alarm. Every manufacturer invents its own bracket, just different enough from all the others to require new screw holes. I should have posted that in Annoyances because it is a small thing that sure annoys me. Probably the best you can do is try to reuse one of the holes and position the bracket to cover the other ones. Depending on your ceiling material, you might be able to get away with some adhesive stick-on strips to hold the alarm in place. I haven't tried them for that but they work pretty well for other things.

 

 

 

 

 

 

With the 10 year ones, installing it and turning it on the bracket activates the switch. So standardizing them would be very difficult. Yes annoying, but far more annoying things than that in life! LED light fittings that fail, and not being able to get matches without replacing them all is another annoyance.


1838 posts

Uber Geek
+1 received by user: 347

Subscriber

  Reply # 2016857 16-May-2018 14:18
Send private message quote this post

Thanks for the heads-up, guys. 

 

Will wander around and check ours.


1400 posts

Uber Geek
+1 received by user: 142


  Reply # 2016863 16-May-2018 14:22
Send private message quote this post

mattwnz:

 

https://www.bunnings.co.nz/kidde-10-year-photoelectric-smoke-alarm_p00022465 . You can probably save by getting mitre 10 to price beat it if you are getting a house lot..

 

 

Mitre 10 don't sell that brand so they wouldn't price beat it. And even if they did sell that brand and you found what looked to be an identical model, you'll find that it will have a different model code and so Mitre 10 will say their price match guarantee doesn't count. That's how Mitre 10 and Bunnings get away with their price match guarantee, they get the suppliers to create a unique model number.


4183 posts

Uber Geek
+1 received by user: 1660


  Reply # 2016893 16-May-2018 14:53
Send private message quote this post

networkn:

 

We previously used two of the long life tiny little units. I can't recall their names. We had the heat ones in the kitchen and the smoke ones elsewhere. 

 

 

Cavius? 

 

That's what we have.  I thought the kitchen ones were ionisation alarms but just checked the website and they are heat.





Mike

2397 posts

Uber Geek
+1 received by user: 268


  Reply # 2016894 16-May-2018 14:53
Send private message quote this post

mattwnz:

In case anyone is looking for new alarms, Bunnings have a special on 10 year photoelectiric ones for just 8 dollars!. That is almost cheaper than a battery, and alarms should be replaced every 10 years anyway.  https://www.bunnings.co.nz/kidde-10-year-photoelectric-smoke-alarm_p00022465 . You can probably save by getting mitre 10 to price beat it if you are getting a house lot..



The Kidde 10Y29 sell for close to £13 on Amazon UK. $8 does look like a good price.



4183 posts

Uber Geek
+1 received by user: 1660


  Reply # 2016977 16-May-2018 16:06
Send private message quote this post

Bung:

The Kidde 10Y29 sell for close to £13 on Amazon UK. $8 does look like a good price.

 

Are they any good? 

 

Interesting product smoke alarms from a user review perspective. 

 

Few consumers ever know (or want to find out) if their smoke detector actually does it's job well.





Mike

363 posts

Ultimate Geek
+1 received by user: 27


  Reply # 2016993 16-May-2018 16:47
Send private message quote this post

mattwnz:

alasta:


I have been thinking for a while that I should replace my ionising unit with a photoelectric unit but I've been putting it off because I'm guessing the bracket won't fit the existing screw holes, which means more holes in the ceiling.


How do other people deal with this when replacing old smoke alarms? I assume there's no standardisation of the gap between the two screw holes in the bracket?



 


Although you can just cover the holes with the new alarm fixing plate. Heard people fill the holes with toothpaste instead of plaster filler.


 


In case anyone is looking for new alarms, Bunnings have a special on 10 year photoelectiric ones for just 8 dollars!. That is almost cheaper than a battery, and alarms should be replaced every 10 years anyway.  https://www.bunnings.co.nz/kidde-10-year-photoelectric-smoke-alarm_p00022465 . You can probably save by getting mitre 10 to price beat it if you are getting a house lot..



Thank you will get some this weekend

 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

IBM leads Call for Code to use cloud, data, AI, blockchain for natural disaster relief
Posted 25-May-2018 14:12


New FUJIFILM X-T100 aims to do better job than smartphones
Posted 24-May-2018 20:17


Stuff takes 100% ownership of Stuff Fibre
Posted 24-May-2018 19:41


Exhibition to showcase digital artwork from across the globe
Posted 23-May-2018 16:44


Auckland tops list of most vulnerable cities in a zombie apocalypse
Posted 23-May-2018 12:52


ASB first bank in New Zealand to step out with Garmin Pay
Posted 23-May-2018 00:10


Umbrellar becomes Microsoft Cloud Solution Provider
Posted 22-May-2018 15:43


Three New Zealand projects shortlisted in IDC Asia Pacific Smart Cities Awards
Posted 22-May-2018 15:14


UpStarters - the New Zealand tech and innovation story
Posted 21-May-2018 09:55


Lightbox updates platform with new streaming options
Posted 17-May-2018 13:09


Norton Core router launches with high-performance, IoT security in New Zealand
Posted 16-May-2018 02:00


D-Link ANZ launches new 4G LTE Dual SIM M2M VPN Router
Posted 15-May-2018 19:30


New Panasonic LUMIX FT7 ideal for outdoor: waterproof, dustproof
Posted 15-May-2018 19:17


Ryanair Goes All-In on AWS
Posted 15-May-2018 19:14


Te Papa and EQC Minecraft Mod shakes up earthquake education
Posted 15-May-2018 19:12



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.