Kidde Firex KF30 (Mains/Battery Heat Alarm) by Kidde

The current alarm model, which comes with a ten year expiry date, fits perfectly in the old base, the part that is fixed on the ceiling, and can be connected using the old base's electricity supply plug. Therefore installation is very easy and one does not have to interfere with the 230 Volts supply.

Purchased several of these to replace devices thad has exceeded their 10 year design life. They are easy plug replacements but it was necessary to also fit the supplied base plates as the new ones are lighter in colour.

Excellent replacement for our old alarms. Fit Perfectly and should Last another 10 years. A very bright green light helps in the dark. They come with batteries and although it was free delivery still £120 for 4. No others available at that price.

Top heat alarm, straight swap. Good tracking arrived on time

As described!

Heat and smoke alarms have a 10 year lifespan - ours are linked so if one goes off, they all do. Our hear alarm kept on going off because they lose sensitivity at the end of their life. Instructions are easy. 1 heat alarm and 3 smoke alarms replaced in an hour for £100!

Neat looking once installed. If you are replacing an old system, you’ll need an electrician to install.

Replaced kidde heat alarm which had yellowed, hope this one doesn't do the same..