The HW1-PF-T is a mains-powered heat alarm with a 9V battery backup, featuring an improved Push-Fit base for quicker and easier installations. It provides Class A2 heat detection (54°C - 70°C), making it suitable for areas prone to false alarms from smoke detectors, such as kitchens, attics, and garages. British Standard 5839-6 recommends heat alarms for these specific locations.