But this is only a three-year-old house.
> On Aug 18, 2015, at 12:23 PM, David Robbins <email@example.com> wrote:
> replacement is always an option for smoke detectors... most of them have a
> limited lifetime because the radioactive source they use decays to a point
> that they don't work any more.
> Aug 18, 2015 12:05:05 PM, firstname.lastname@example.org wrote:
> Unfortunately, replacement is not an option. It is a two family house that I
> built with my daughter and her husband. We have the "mother-in-law" side.
> There are about two dozen of them wired throughout the two sides of a large
> house with fairly new construction. I don't mind the chirping so much in my
> shack, but the chirping over in their side is what is most of the problem.
> The system is set up so that a fire on one side causes alarms to sound on
> both sides.
> Stan, K4SBZ
> (850) 893-5003 (H) (850) 590-6617 (M)
> "Real radio bounces off the sky."
>> On Aug 18, 2015, at 10:42 AM, Richard Battles wrote:
>> Replaced the group with independent units that use batteries. the reason was
>> that I noticed that the circuit board was showing signs of heat stress
>> around a diode and resistor inside the unit. The security alarm system was
>> upgraded to
>> handle smoke detectors as well. No RFI issues.
>>> On Tue, Aug 18, 2015 at 6:17 AM, Howard Lester wrote:
>>> To clarify for others, I don't think you mean the detectors are battery
>>> operated. Rather, they (like mine in my hard-wired system) have batteries
>>> (typically 9V) used for backup power.
>>>> On Mon, Aug 17, 2015 at 9:34 PM, Stan Zawrotny wrote:
>>>>>> You have a somewhat unusual configuration compared to most that just
>>>> install battery operated, independent units.
>>>> Actually not. Wireless smoke detector systems are very common. If one
>>>> detector alerts, it alerts all detectors throughout the house. Each unit is
>>>> battery operated. But independent units are not installed in modern homes
>>>> any more.
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