Smoke, Heat & Carbon Monoxide Alarms

Smoke, heat and carbon monoxide alarms from Honeywell Home and Wisualarm, covering stand-alone, radio-interlinked and mains-powered models for UK homes, rental properties and new builds. Each alarm detects something different, so a complete setup uses the right type in the right room.

Which alarm goes where?

Optical smoke alarms suit hallways, landings and living areas. Heat alarms suit kitchens and garages, where steam and cooking fumes would trigger a smoke alarm. Carbon monoxide alarms belong in any room with a gas, oil or solid fuel appliance, and in bedrooms. Smoke alarms cannot detect CO and CO alarms cannot detect smoke, so you need both. Place CO alarms typically 1–3 m from the appliance, following the manufacturer's instructions.

Battery, mains and interconnected options

Sealed 10-year battery alarms need no wiring and no battery changes, which makes them a good fit for retrofits and rental properties. Wisualarm mains alarms are available in Grade D1 (sealed lithium backup) and Grade D2 (replaceable 9V backup) and should be fitted by a qualified electrician. To link alarms so that one triggers all, choose radio-interlinked models such as the Honeywell Home R200 N1 series or Wisualarm WisuLink wireless units. The Wisualarm interconnect module and Wi-Fi and Ethernet gateway extend these networks.

Regulations and responsibilities

In England, Building Regulations require a CO alarm when a new or replacement fixed combustion appliance is installed (excluding gas cookers), and private landlords must provide smoke alarms on every storey and CO alarms in rooms with a fixed combustion appliance. Scotland has its own interlinked-alarm requirements. Always check the rules that apply to your property.

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