CO, Heat & Fire Alarms

For the Trade

Start with the space you’ve got and how the job will be used, then the rest falls into place. On a tight refurb, you’ll usually favour the format that fits the layout without creating extra work. If the wiring is already there on a straight run, mains powered fire alarms are often the cleaner call. In mixed areas, interlinked fire alarms matter more than finish or extras, because call-backs usually come from the one unit that wasn’t tied in properly. Keep carbon monoxide alarms as a separate decision, and only add heat alarms where the room calls for it.

Types of CO, Heat & Fire Alarms

For fire alarms, the first split is power and how much disruption you can take.

Mains powered fire alarms suit permanent work where the wiring is already there, or being renewed. They give you a fixed setup, but they only make sense when you can run the cable without adding extra time.

Battery powered fire alarms are quicker to fit and often the cleaner option on smaller jobs. The trade-off is simple - you take on battery checks and replacement.

Wireless fire alarms save chasing cables on refurbs and awkward layouts. Interlinked fire alarms suit jobs where one unit needs to trigger the rest together. Trade fire alarms usually means job-specific kit with less fuss over the spec.

If you’re working across the rest of the range, Alarms & Sensors keeps the wider choice in one place.

Selection Factors for CO, Heat & Fire Alarms

What usually decides it is the risk in the room and how much of the existing setup you’re keeping. Mains powered fire alarms suit jobs where the wiring is already there and you want a fixed fit. Wireless fire alarms make more sense when you’re avoiding extra chasing or the layout is awkward.

Heat alarms are the better call where nuisance triggering is more likely, but you give up earlier smoke response. Carbon monoxide alarms stay a separate call.

If you’re finishing a wider job, it’s often worth sorting Burglar Alarm Accessories or Burglar Alarms at the same time rather than coming back for the small bits later.

Finish the Room

Once the alarm is fixed, the next call is how much of the room you want to disturb. On a refurb, you’ll often work around what’s already there. On a new build, you’ve got more room to keep the fire side on one scheme.

If the job also needs other security kit, keep it separate. Burglar alarm accessories and burglar alarms are a different buy, and that’s where specs get muddled. For the fire alarms themselves, the check stays the same: existing wiring, access, and how much you want to change before you close up.