System Sensor today announced that it has launched its new i4 Series Combination CO/Smoke Detector and Integration Module. The i4 Series is the first low-voltage, system-connected, combination smoke ...

Q: My home has hard-wired smoke detectors. How often do I need to replace them, and what kind of replacements do I need? Can I do it myself, or do I need a professional? And if I need a pro, what kind ...