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Finding Smoke Alarm Information

6/30/2017

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What kind of smoke alarm is in your house? Odds are is that your current alarm is an ionization type. How old is your alarm? If your house is over 10 years old it's likely that your alarm is past the recommended replacement date. This post shows you how to check what type and how old your smoke alarm is. 
Smoke alarms should be located on each floor and inside all sleeping locations.
Step 1: Find a smoke alarm. These should be located on each floor and inside all sleeping locations.
Hand removing a smoke alarm body from the baseplate.
Step 2: Remove the alarm body from the baseplate with a counter clockwise twist.
Hand removing an alarm body from its baseplate.
Step 3: Careful with the wires inside an interconnected system. Look at the back of the alarm body for the age stamp and information on Americium 241.
Step 1: Find a smoke alarm. There should be one on every floor of your home and inside every bedroom. 

Step 2: Remove the working part of the alarm from the base plate. Generally this is accomplished by twisting the alarm body counterclockwise until it releases. If you have a hardwired system (all the alarms are interconnected) be careful of the wire connections inside the junction box.

Step 3: Look at the information plate on the rear of the alarm body. You are looking for a date of manufacture and a statement warning of the presence of Americium 241. The date of manufacture will tell you how old the alarm is. If over 10 years old, it is recommended to replace it. If the alarm contains Americium 241 it has an ionization sensor and is best at detecting flaming type of fires. It is possible that it is a dual unit but likely that it is a single sensor system. Dual type units usually have that information printed on the front.

Step 4: Replace the alarm body in the baseplate with a clockwise motion. 

Step 5: If your alarm is over 10 years old, plan on heading to the local big box store to look at replacements. It is helpful to note the brand and model of your current smoke alarm to aid in finding the correct replacement model. 
Information plate on the back of a fire alarm giving date of manufacture.
Alarm body information. Date of manufacture is AUG 27 of 2001. There is a warning statement about the presence of Americium 241 - this is an ionization type alarm. This alarm is over 10 years old, needs to be replaced.
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    Brian Jovag, owner of Jovag Home Inspection.

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