Kidde makes smoke alarms, carbon monoxide alarms and fire extinguishers, and the listings here cover hardwired residential alarms plus a small extinguisher for a kitchen or garage. Alarms split by what they sense and how they signal. A smoke-only unit covers fire, a combination unit adds carbon monoxide, and talking models announce the hazard rather than only sounding. Strobe models add a visual signal for hard of hearing occupants. Hardwired units with a sealed 10-year battery still need the circuit and interconnect conductor run in at rough-in.
**What does the 5-B:C rating on the extinguisher mean?**
The letters are the fire classes it is tested on. B covers flammable liquids such as grease and oil, C covers energized electrical equipment, and the number ahead of B is the relative capacity on liquid fires. A 5-B:C is the small kitchen and garage size. It carries no A rating, so it is not meant for wood, paper or fabric.
**Do I need a combination smoke and CO alarm?**
That depends on the fuels in the building and the local requirements. Carbon monoxide detection comes into play where there is a fuel burning appliance or an attached garage. A combination unit covers both hazards from one device and one box, which saves a second rough-in location, though the two hazards have different ideal mounting heights worth weighing.
**What separates the 2-in-1 from the 3-in-1 strobe alarm?**
The 2-in-1 pairs a smoke alarm with an LED strobe. The 3-in-1 adds carbon monoxide sensing, so it is smoke, CO and strobe in a single unit. Both listed models are hardwired with a sealed 10-year battery and voice announcement. Choose the 3-in-1 where CO coverage is needed at that same location.
**Can these interconnect with alarms already in the house?**
Interconnection works between compatible hardwired alarms sharing an interconnect conductor. Mixing brands or generations is where it comes apart, so check the compatibility information for the alarm you are adding against what is already on the circuit. If the existing alarms are near their replacement date, swapping the whole set is the cleaner job.
**Can alarms go on the same order as the rest of my devices?**
Yes. Adding alarms to a device or wire order helps clear the $150 mark for free shipping to Ontario and Quebec, and the rest of Canada takes 10 percent off at checkout. Delivery runs 3 to 7 business days nationally. Pickup at 8520 Jane St in Vaughan, Ontario is there if the job is local.