Replacement for Kidde KF10 Mains Powered Smoke Alarms

Excellent replacement for my old Firex 1240C from 2003. The smoke alarm system is referred to as a dual voltage power supply with 230v mains power or 9v battery backup.Firex have replaced models over the years however the AC connector and the backplate remains the same. This makes installation of the Kidde/Firex KF20 simple as existing wiring and backplate can be used. This is the second replacement of my original fire alarms. The previous replacement was a Firex Smoke Alarm 4870 (Kidde), also compatible, however this smoke alarm is unavailable. The Firex KF20 is fully compatible with the original system.Therefore, a simple installation by removing the old alarm and unplugging the AC connector, followed by plugging the AC connector into the new smoke alarm and affixing to existing ceiling plate.New unit comes with rawplugs, screws and ceiling mount – but not needed if replacing an existing smoke alarm.

Purchased this to replace Kidde 4870 - easy to fit to same baseplate and wiring, Only difference seems to be a green light which is on all the time to say mains power on and it says you can mute the low battery warning for 8 hours so when it starts beeping at 3am, as they always seem to do, you can mute it and finish your sleep before replacing battery! Only thing to watch out for is make sure the battery backup is securely in place before you fit it - I didn't and it started beeping as soon as I had put the ladder away.

ordered two of these, one for upstairs ,and one for down ,one worked great with no problems theother sadly did not. even swapped them over and both ok so I discovered the problem was with theconnection lead from mains to detector , not good workmanship on makers side, will be in touch with amazon. will give 5 for one that works and 0 for the other

Replaced a faulty smoke alarm with this one. Easy to order with swift delivery.

Super simply direct replacement for my old pair of l240C alarms.Everything that’s needed is in the box. Unclipped the old one, swapped connection block and in with the new.

Bought to replace 2 older existing, easy fit into existing base & connection

Ok

Having read a number of reviews. No electrician needed. Fitting it is as simple as removing the old smoke alarm and fitting the new one. Removal of the old plate was not needed, nor the electrical wiring as shown in the second pic. Super !