When we moved into our house a few years ago the previous owners only had two smoke alarms in the house, and none in the bedrooms. So the first thing we did was go out and buy some, install, call it a day. DH was just watching a video on types of alarms, ionization and photoelectric-I had no idea there were different kinds! I just figured different brands, price ranges, combo with carbon monoxide. We got a middle of the road one and a separate carbon monoxide detector. We have the ionization ones, now I'm thinking we need to get the photoelectric ones as well.

What type do you have? One or the other, combo?