

🔥 Stay ahead of danger with seamless, smart smoke detection ⚡
The Kidde FireX KF20 is a mains-powered optical smoke alarm featuring a 9V battery backup for continuous protection. It interlinks with other FireX alarms to trigger simultaneous alerts across your home. Certified by BSI and CE, it includes a combined test/hush button and LED indicators for easy monitoring. Designed for quick, electrician-free installation, it’s a reliable upgrade for modern fire safety.
| ASIN | B01B67P0KA |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 15,843 in DIY & Tools ( See Top 100 in DIY & Tools ) 76 in Smoke Alarms |
| Colour | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (429) |
| Date First Available | 28 Jan. 2016 |
| Item Weight | 320 g |
| Manufacturer | iXium |
| Manufacturer reference | 5055633354711 |
| Part Number | 5055633354711 |
| Power Source | Battery Powered |
| Product Dimensions | 5.5 x 13.5 x 13.5 cm; 320 g |
| Style | Classic |
M**.
Perfect replacement for FireX FADC 230
Moved house. Had 2 old expired FireX FADC 230’s. Perfect replacement. Simply disconnected plugs and plugged in new devices, even fitted the original base plate. Saved me the cost of getting an electrician out. Great value arrived fast, very happy.
A**R
It was a straight easy fit from old to new!
Took 4 mins to install, connections are the same! Good price! Loved it! Works a treat!
J**L
KF10 replacement
Direct replacement for the older Kidde unit KF10... Fits perfect onto old frame and mains connector block. Very pleased with the item.
M**M
Still functional after a year
Still functional after a year
A**R
Fire alarm
Brought this wired smoke alarm as previous one had pretty much reached its life span. Wires already there so just a case of plugging it in and placing in the bracket. All working fine so far. Has a 10yr life span so hopefully will last that long. Arrives with duracel back up battery. Very loud when it goes off. There are cheaper but you can't put a price on your life. Got this one in particular as it was what I already have and have the same upstairs and as I had them fitted during renovations and rewire so as they "speak" to each other seemed best to get the same one.
M**S
ideal replacement
Direct plug in replacement for the obsolete mains / battery back-up Firex FADC230. No need for any adaptor or rewiring. Haven't smoke tested it yet, but the test button proves it has a loud, piercing alarm. A good quality product. Same size as the defunct unit, battery life yet to be tested. Battery is now located on the underside which might make replacement easier than the fiddly door on the FADC230.
T**N
Easy to fit
Excellent product. Easy to fit
S**A
Easy to install
Bought as a replacement to an expired alarm, thrilled to find the company has maintained the same fixings over time so it's a really easy swap in/swap out. If fitting for the first time then the only extra task is fitting a plate to ceiling, which looks to be a simple case of drilling a couple of fixings in the ceiling and screwing on. The alarm works as described, hasn't given me any trouble and has a long expiry date - would buy again.
Trustpilot
1 month ago
2 months ago