Just out of professional interest, do you have any, and do you ever test them?
The general guide is that your home should have AT LEAST one per level, they should be located on the ceiling along your escape route, and they should be tested once a week, minimum. It is also a good idea to vacuum the sensor once a week too, to remove dust, bugs and spiders etc.
The general guide is that your home should have AT LEAST one per level, they should be located on the ceiling along your escape route, and they should be tested once a week, minimum. It is also a good idea to vacuum the sensor once a week too, to remove dust, bugs and spiders etc.