Yes, control units and system smoke detectors are permitted as alternatives to single or multiple station smoke alarms provided they are installed according to Oregon Uniform Fire Code specifications. Only ionization smoke alarms that are solely battery operated need to have a ten-year battery. The OSFM recommends using long-life batteries in all smoke alarms for enhanced reliability. If you have ionization alarms, they must have a hush feature, and if the ionization alarm is solely battery operated it must have a ten-year battery. An ionization smoke alarm will have a radioactive symbol inside the detector or on the back of it.
Smoke alarms have a limited life span.
Alarms that are ten years old or older need to be replaced. Test smoke alarms monthly. Vacuum your alarms monthly to remove dust and cobwebs. If you have photoelectric alarms, replace the batteries with long-life batteries for enhanced reliability. Look for an alarm that has a hush feature, a malfunction signal, a loud alarm and if it is solely battery operated, a ten-year battery.