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.




15238 posts

Uber Geek

Trusted
Subscriber

# 243732 29-Dec-2018 06:59
Send private message

... because they can go off at random times between midnight and 6am, and because it's up high you have a heck of a job working out where it's coming from. I guess it was dust in our ceiling cavity, or a mouse pushing the test button...


That is all.


Create new topic
8874 posts

Uber Geek

Lifetime subscriber

  # 2151720 29-Dec-2018 07:24
Send private message

they will be getting dust in them which will cause them to go off

 

why would you have one in the ceiling cavity anyways?




15238 posts

Uber Geek

Trusted
Subscriber

  # 2151721 29-Dec-2018 07:29
Send private message

Jase2985:

they will be getting dust in them which will cause them to go off


why would you have one in the ceiling cavity anyways?



In case a fire started up there. I had it spare.

I guess the other type may be more effective?

 
 
 
 


28269 posts

Uber Geek

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  # 2151724 29-Dec-2018 07:33
One person supports this post
Send private message

I've never heard of anybody ever installing a smoke alarm in a roof space and it's a bad idea for the reason you've discovered - the roof space is full of dust so they're going to trigger continually when dust enters the chamber. Both ionisation and photoelectric alarms will suffer this issue.

 

 




15238 posts

Uber Geek

Trusted
Subscriber

  # 2151727 29-Dec-2018 07:40
Send private message

I just figured "why not?". And now I know.

1848 posts

Uber Geek

Subscriber

  # 2151730 29-Dec-2018 07:44
Send private message

you are better off installing wired smoke alarms that intergrate with your home security system. Then all you need to do is use the keypad to hush them. 

 

Eitherway... one in the roofspace will keep you awake regardless.

 

 

 

I wonder how HRV (ventilation gumps), do it with their systems?  (perhaps that smoke alarm is a really small one and focussed on the motor). 

 

 




15238 posts

Uber Geek

Trusted
Subscriber

  # 2151736 29-Dec-2018 07:48
Send private message

We have a central smoke alarm attached to the alarm system between our bedrooms in the hallway. I've put extra smoke alarms in the bedrooms and kitchen so we get earlier warnings if there is a fire. I could get more wired in, I think I have a couple more slots on the alarm available, but because I already got standalone ones which will be a bunch cheaper I bet.

616 posts

Ultimate Geek


  # 2151748 29-Dec-2018 08:54
One person supports this post
Send private message

I have always thought that smoke alarms in the ceiling cavity would be a good idea. It is a hot dry dusty place with lots of electrical wiring etc. so is probably an area that fires could start in. Trouble is that those conditions also make it an unsuitable place to install smoke alarms.


 
 
 
 


281 posts

Ultimate Geek
Inactive user


  # 2151785 29-Dec-2018 11:07
Send private message

You could put a heat alarm up there (as recommended for kitchens).



15238 posts

Uber Geek

Trusted
Subscriber

  # 2151787 29-Dec-2018 11:13
Send private message

Probably won't bother. It can get up to above 40 up there in summer.

281 posts

Ultimate Geek
Inactive user


  # 2151790 29-Dec-2018 11:18
Send private message

Good point. I'm planning to put a DS18B20 temperature sensor up there as I extend my 1-wire network throughout the house. I'm curious to see how hot it really gets on a sunny summer's day.

mdf

2328 posts

Uber Geek

Trusted
Subscriber

  # 2151800 29-Dec-2018 11:31
Send private message

The other problem with this is when the battery goes flat and it starts emitting a cheeping reminder noise.

 

We were in a hotel once when this happened to us. Took the staff forever to figure out that it was coming from a smoke alarm in the roof cavity. Much surliness on all sides ensued.




15238 posts

Uber Geek

Trusted
Subscriber

  # 2151815 29-Dec-2018 11:34
Send private message

I have an annual reminder to check smoke alarms including batteries.

8874 posts

Uber Geek

Lifetime subscriber

  # 2151828 29-Dec-2018 12:16
One person supports this post
Send private message

timmmay: I have an annual reminder to check smoke alarms including batteries.

 

its called daylight savings, happens 2x every year


22524 posts

Uber Geek

Trusted
Subscriber

  # 2151873 29-Dec-2018 14:05
Send private message

I have logged a fraction over 60 in my roofspace at the top underneith the black metal tiles. I would expect that would cook any battery in no time if it was a battery alarm.

 

Also all the smoke that blows thru there from the neighbours fires would set it off in winter.





Richard rich.ms

Webhead
2292 posts

Uber Geek

Moderator
Trusted
Lifetime subscriber

  # 2151953 29-Dec-2018 17:47
Send private message

richms:

 

I have logged a fraction over 60 in my roofspace at the top underneith the black metal tiles. I would expect that would cook any battery in no time if it was a battery alarm.

 

Also all the smoke that blows thru there from the neighbours fires would set it off in winter.

 

 

In addition: Most heat sensors will go off around 58 degrees Celcius. The smarter ones will look at how quickly the temperature changes, but any fairly cheap heat alarm would probably just alarm when it passes 58 degrees.





Create new topic



Twitter and LinkedIn »



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 »

Arlo unveils its first video doorbell
Posted 21-Oct-2019 08:27


New Zealand students shortlisted for James Dyson Award
Posted 21-Oct-2019 08:18


Norton LifeLock Launches Norton 360
Posted 21-Oct-2019 08:11


Microsoft New Zealand Partner Awards results
Posted 18-Oct-2019 10:18


Logitech introduces new Made for Google keyboard and mouse devices
Posted 16-Oct-2019 13:36


MATTR launches to accelerate decentralised identity
Posted 16-Oct-2019 10:28


Vodafone X-Squad powers up for customers
Posted 16-Oct-2019 08:15


D Link ANZ launches EXO Smart Mesh Wi Fi Routers with McAfee protection
Posted 15-Oct-2019 11:31


Major Japanese retailer partners with smart New Zealand technology IMAGR
Posted 14-Oct-2019 10:29


Ola pioneers one-time passcode feature to fight rideshare fraud
Posted 14-Oct-2019 10:24


Spark Sport new home of NZC matches from 2020
Posted 10-Oct-2019 09:59


Meet Nola, Noel Leeming's new digital employee
Posted 4-Oct-2019 08:07


Registrations for Sprout Accelerator open for 2020 season
Posted 4-Oct-2019 08:02


Teletrac Navman welcomes AI tech leader Jens Meggers as new President
Posted 4-Oct-2019 07:41


Vodafone makes voice of 4G (VoLTE) official
Posted 4-Oct-2019 07:36



Geekzone Live »

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


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



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.