Does anyone manufacture a combination 120v hardwired dual ionization/photoelectric smoke detector and carbon monoxide alarm? It sounds like the dual sensor smoke alarm is the way to go for the best safety, and my state also requires CO detectors. All I can seem to find are combo smoke/CO alarms that use either ionization or photoelectric for the smoke sensor, not both. I don't want to install different alarms all over my ceiling. Surely there's one out there that combines all these features??? Thanks!