EXPLANATION: BATTERY-OPERATED AND WIRED DETECTORS
A fire can occur at any time, day or night. It is therefore essential that occupants are warned as soon as possible so they can evacuate quickly and safely. We all understand the importance of having smoke alarms in our homes, but homeowners may be unsure which type to choose (battery-powered or hard-wired) and where they should be installed. This article serves as a useful guide to the different types of smoke alarms available.
How many smoke detectors do I need?
There is no single answer to this question, as the number of detectors and their placement will depend on the building regulations in your area.
- For properties in England and Wales, see Building Regulations Document B.
- For properties in Scotland, see the Fire Technical Handbook - Domestic .
- For properties in Northern Ireland, see Technical Handbook E.
However, ALL building regulations advise that smoke alarms should be interconnected and recommend that fire detection systems be provided in accordance with BS 5839-6.
An interconnected system means that when one alarm sounds, they all sound. This gives people more time to react and evacuate the building, wherever they are.
What are the different types of smoke detectors?
Before choosing a detector, it's important to understand the different types (battery-powered or wired). Consider the pros and cons of both types before making your choice.
Battery-operated smoke detectors
As the name suggests, a battery-powered smoke detector operates on batteries. This can be a 9V battery with a battery life of 1 to 5 years, or a 10-year lithium battery.
The lithium batteries are sealed and therefore cannot be replaced. However, as they have a 10-year lifespan, they are unlikely to need replacing during the life of the detector.
Hardwired smoke detectors
Hardwired smoke detectors are mains powered and include a backup battery in case of a power outage. Since both the power supply and battery are unlikely to fail at the same time, hardwired smoke detectors offer an extremely reliable form of protection. Furthermore, since hardwired smoke detectors are connected via mains power, they will sound indefinitely until they are turned off.
This type of alarm is very suitable for those who do not remember or want to check and replace the batteries regularly.
Installation of battery-operated and hard-wired smoke detectors
Installing battery-powered smoke detectors doesn't require any technical expertise. Detectors should be installed according to the manufacturer's instructions, but battery-powered products are generally quick and easy to install without the need for an electrician. The detector is simply attached to the ceiling and the battery is installed in the appropriate compartment. Reliable protection in minutes!
As wired detectors are connected to the mains, installation must be carried out by a qualified electrician.
Helping you protect your home
At Kidde , we strive to help you protect people and property from fire and related hazards. Installing smoke alarms is the best way to protect your property and prevent tragedy. If you need advice or assistance with any of our Kidde smoke, heat, or carbon monoxide alarms, our technical teams are available to ensure you have the right equipment in all areas of your home.