Mains Ionisation Smoke Alarm + Alkaline Battery
Mains powered (for professional installation) with Duracell loose alkaline battery back-up and 6-year guarantee.
Complying with current minimum requirements of the relevant Building Regulations for
new housing, i.e. Grade D (BS5839, Part 6).
Ionisation Smoke Alarms are for use where a fast flaming fire
(for example, electrical equipment igniting) is more likely to be a hazard
than a slow, smouldering one, such as dining and living rooms.
They are more prone to nuisance alarms from cooking particles and steam near kitchens.
They contain a very small amount of Americium 241 radioactive
material, which may be a consideration for storage and disposal.