Smoke detectors

RatLabGuy

You look like a monkey and smell like one too
Joined
May 18, 2005
Location
Churchville, MD
I know we have several firefighter/EMS/other safety related folks here, looking for expert opinions.

BLUF: looking for suggestions for a recommended detector model(s) given my setup below.

I'm finishing part of my basement (per permit) and have come to realize I need to update the smoke detector(s) and add some to that space to match current code .
My understanding is now any new ones must have AC power primary AND must be interconnected w/ other units.
And, my state now requires they be 10-year "sealed battery" units you replace (law says in place by 2018). My interpretation though is that's the case w/ any non-AC hardwired unit?

House is a standard ranch built in '67 and mostly just has a handful of cheap standalone 9v units. At some point the PO installed a home monitoring/alarm system, and there's one in the main hallway, attic, and basement which are hardwired together.

My thinking is, we've already been here 7.5 years, might as well just replace everything now and do it all in one fell swoop and do it right.

Now, I really don't want to go running interconnect wire everywhere or new AC where not necessary.

re: placement, my plan is:
- mud room/laundry that sis between kitchen and garage
- back den (not far from kitchen)
- heat detector (not smoke) in dinette area continuous w/ kitchen (standard detector has been problematic here w/ smoky cooking)
- main hallway close to all bedroom doors (existing hardwired already)
- attic (existing hardwired already)
- basement unfinished area (existing hardwired already)
- basement living room, away from fireplace (may need to use heat detector?)
- basement "media room"

That's 8 units at least. I know current code is inside each bedroom... which would add 3 more... but the cost on this is going to add up quickly.

I know there are wireless interconnect systems, like FirstAlert ONELink, which seems like a good solution.

What say ye? Is there a particularly good/preferred model?

I really don't care for the interconnect thing, as I've been in a house where they went off and it's awful b/c all you hear everywhere is alarms and you can't tell which one is actually at the source. I understand the point, but my house is only 1800 sf, it's not like we can't hear an alarm from anywhere in the house.

I'm tempted to put AC hardwired wireless link ones just where required (e.g. in new space in basement) and replacing the existing ones (hallway, attic, basement) so those are all interconnected, and just use 10-year battery non-interconnect ones everywhere else to keep it affordable and easy.
 
One in each bedroom and one outside of the bedrooms no more than 30' apart is about what NC says. There may be some other language there about basements or multi levels as well but I can't remember all of it. How in the world are coming up with 11 in a ranch home? I just put some in a 3 bedroom, 2,008 sq ft home that had zero detectors and only put in 5, just passed inspection last week.
 
Since it sounds like you're going to be buying a pile of them, split the purchase between ionization and photoelectric smokes.
 
here may be some other language there about basements or multi levels as well but I can't remember all of it. How in the world are coming up with 11 in a ranch home?

MD is basically the same. One in each bedroom, one in the hall outside a bedroom, one on each additional occupiable floor, none within 3ft of a bathroom door, unless it precludes putting one in a req'd location. Ionization smokes can't be within 20ft of a cooking appliance, and photoelectrics have to be 6ft away.
 
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One in each bedroom and one outside of the bedrooms no more than 30' apart is about what NC says. There may be some other language there about basements or multi levels as well but I can't remember all of it. How in the world are coming up with 11 in a ranch home? I just put some in a 3 bedroom, 2,008 sq ft home that had zero detectors and only put in 5, just passed inspection last week.
code says must have at least one per floor, in addition to the bedroom thing.

Our whole house is only 26' wide, with all bedrooms near one another on one end so the one in the hallway now puts it only a couple feet from every bedroom door. If I put one inside every bedroom also, that'd be 4 within about a 200 sq ft area of each other
11 was based on the above list, IF I added one per bedroom also. 3 in basement, 1 in attic, 4 on main floor PLUS bedrooms?. Yeah the point was, it seems like an awful lot, once you put them in the reasonably logical places.
 
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none within 3ft of a bathroom door, unless it precludes putting one in a req'd location.

So, house I grew up in in Cary had one in the hallway just outside the bathroom door.
As long as you ran the fan when you took a shower, no problem, but whenever a guest stayed over and they didn't - as soon as they opened the door, you could expect that within 5 seconds the alarm would go off.
Dad said he almost moved it, but decided it was better to keep as a reminder to force us to always run the exhaust fan so as to keep the humidity at bay over the long term...
 
Steam shouldn't set off an ionization detector but will a photoelectric.
 
Steam shouldn't set off an ionization detector but will a photoelectric.

Code doesn't specify, just says you can't put one there, unless it precludes putting one in a required location.

It does specify minimum distance from cooking appliances.
 
Call your local FD. We supply and install new smoke detectors and CO for FREE!
 


Just so you know...

Since it sounds like you're going to be buying a pile of them, split the purchase between ionization and photoelectric smokes.

I agree with the man. Make sure smoke detectors are installed at least 18" above door frames. Personally, I like them being tied together so you will potentially have full awareness of a problem.
 
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