Whether you’re replacing existing detectors or installing one for the first time, you have options. For smoke detection, there are two technologies available: photoelectric and ionization. Each of these performs best at detecting distinctly different kinds of fires. So, it is good to have both kinds represented in your home. You can also choose a single-function unit or a combination smoke and carbon monoxide detector. Additionally, the innovations in smart home products extend beyond smart thermostats and smart home security devices and systems. Smart smoke and CO detectors can be connected to your home's smart system as well. That way, you will get alerts on your phone even if you’re out of the house.
While you can run your detectors on batteries, it is preferable to hardwire (though you should always install backup batteries in case of power outages). The best carbon monoxide detectors and best smoke detectors for your home will be the ones that fit within your budget while offering the widest and most consistent coverage throughout your home.