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Smoke alarms are powered by battery or by your home's electrical system. If the smoke alarm is powered by battery, it runs on either a disposable 9-volt battery or a non-replaceable 10-year sealed lithium battery. Alarms that receive their power from your home's electrical system (hardwired alarms) usually have a back-up battery that will need to be replaced once or twice a year.
There are two types of sensing technology available. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. Kidde strongly recommends that both ionization and photoelectric smoke alarms be installed to help insure maximum detection of the various types of fire that can occur within the home.
There are many special features that can help protect you and your home, or make your safety products easier to maintain and operate. Many of these features are not well known by their name, so to learn more about specific features of a model, select it and view its detail page.
The combination smoke and carbon monoxide alarm shall be Kidde model number P3010CU or approved equal. It shall be powered by a non-replaceable lithium battery with a 10-year life. The lithium battery shall be sealed in the unit to prevent removal and/or tampering. The unit shall incorporate a photoelectric smoke sensor and an electrochemical carbon monoxide sensor. The CO sensor shall be of a fuel cell design and provide accuracy of +/- 20% + 15 PPM. The temperature operating range shall be between 40ºF and 100ºF (4ºC and 38ºC) and the humidity operating range shall be 10%-95% non-condensing relative humidity.
The alarm can be installed on the surface of any wall or ceiling following the UL/Manufacturer’s approved placement guidelines. The alarm shall incorporate an automatic activation feature that will activate the unit as soon as it is attached to the mounting bracket, no other steps are involved.
The alarm shall include a test button that will electronically simulate the presence of smoke and CO and cause the unit to go into both modes of alarm. This sequence tests the unit’s electronics to ensure proper operation.
The CO sensor will not alarm to levels of CO below 30 PPM and will alarm in the following time range when exposed to the corresponding levels of CO.
70 PPM CO Concentration 60 – 240 Minutes
150 PPM CO Concentration 10 – 50 Minutes
400 PPM CO Concentration 4 – 15 Minutes
The alarm shall include a piezoelectric horn that is rated at 85 decibels at 10 feet. For a CO incident, the horn will sound in the repetitive manner – 4 quick beeps, voice message “Warning! Carbon Monoxide”, 4 quick beeps. In a smoke incident, the horn sounds 3 long beeps, voice message “Fire!”, 3 long beeps, repeating. The red LED will flash in conjunction with the alarm sound. See User Guide for details regarding voice warning for low battery condition.
The unit shall indicate a low battery condition with a brief alarm chirp every 60 seconds and LED flash once every 30 seconds. In standby condition, the LED will flash every 60 seconds for the first 10 minutes following power on or test, and once every 10 minutes thereafter. It will also flash every 10 seconds while in Hush mode.
The smoke alarm shall include an End of Life Alert, where ten years after initial power-up the unit shall chirp two times every 30 seconds to indicate the alarm needs to be replaced. The
End of Life indication can be silenced for 3 days at a time for a maximum of 30 days. The unit shall have a deactivation switch to disable it and make it safe for disposal.
The unit shall at a minimum meet the requirements of UL217, UL 2034, NFPA 72. The State of California Fire Marshall, NFPA 101 (One and two family dwellings), Federal Housing Authority (FHA), Housing and Urban Development (HUD). It shall also include a 10-year manufacturer’s limited warranty.