Questions and Answers for Kidde 10-Year Worry Free Smoke & Carbon Monoxide Detector, Lithium Battery Powered with Photoelectric Sensor

A:  Hello. The direct replacement is the KN-COSM-XTR-BA model 21029921 but we also have the new versions models 21031502,(without voice, meets new standards of avoiding nuisance alarms for cooking), 21032777 (with voice, meets new standards of avoiding nuisance alarms for cooking), 21032244 (without voice), and 21032090 (with voice).

A:  False alarms are most commonly caused by something interfering with the sensor. To clean the alarm, hold the unit by its edge and thoroughly blow through the gap on the side of the unit with compressed air (like keyboard cleaner). We recommend cleaning out all of your smoke alarms at least every 6 months to a year and at this point we would recommend cleaning out all of your other alarms as well as a preventative. Some of your alarms may be in one the locations to avoid listed in the owner's manuals. This would especially include alarms being installed within 3 ft (.9m) of a forced air supply ducts used for heating or cooling, ceiling or whole house ventilating fans, or other high air flow areas. We recommend that alarms not be installed near vents, flues, chimneys, or fans. We recommend that alarms not be installed near doors or windows near areas directly exposed to the weather. We strongly recommend not to install these alarms in garages, attics, and crawl spaces as you will get temperatures, dust, insects, and chemicals that can cause nuisance alarms. Try cleaning out the alarms. If you have the issue again, find the alarm setting off all of the others and call us with that alarm in hand at 1-800-880-6788 so we can get this resolved for you.

A:  Hello. The alarm comes with a mounting plate bracket and screws. There are instructions in the owner's manuals with drawings on how to install the smoke alarm bracket.

A:  Hello. That would be the 900-CUAR model 21032251 with the wiring harness 20-9003 adaptor, Internet # 325826336, Model # 21032239, Store SKU # 1009901067.

A:  Hello. You will want to get the P4010ACSCO model 21029893.

A:  Hello. This alarm is not hardwired and can not be plugged in.

A:  no it is not

A:  Lithium batteries in smoke alarms work fine. The lithium batteries in these alarms are very small and will not cause a fire. Mike

A:  Hello. This alarm does not have a large rechargeable lithium battery like you would find in a E-Scooter or an electric car. The battery in the alarm is more like the 9 volt lithium batteries but built into the alarm. We do not believe the battery built into the alarm is a fire hazard.

A:  Hello. the model number is on the back of the alarm, second line from the top, where it says the word Model or will be closer to center of the back of the alarm. You will have to take the alarm down to see the model.