Ionisation or optical? The title says optical but the description says ionisation!

Must have been a cut and paste job... KF20 is optical and that was what I received. :-)

Can this alarm be connected with the KF10 already installed

Yes it can, you will need to do this be running wires to each alarm you wish to interconnect or you will need the wireless template called the RF-SFTP for each alarm then will be interconnected

Please could you tell me the diameter of the mounting plate as it will be replacing old alarms. Thanks

No sorry as I just swapped it with the same one

What is the diameter of this alarm ?

The KF20 dimensions are: Alarm Dimensions 127 x 127 x 39mm Bracket Dimensions 133 x 133 x 6mm

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New Kidde FireX KF20 Mains Powered Optical Smoke Alarm Fire Detector with 9V Battery Backup

Product ID: 56429092

Details

Alarm
Visual
Brand
iXium
Colour
White
Item weight
0.32 Kilograms
Manufacturer
iXium
Power source
Battery

⚡230V mains powered for constant protection

🔋9V battery backup ensures uninterrupted safety

🔗Interlinking capability for whole-home alerts

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11332 som

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stay ahead of danger with seamless, smart smoke detection ⚡

USER FRIENDLY CONTROL - Combined Test/Hush button lets you easily silence false alarms and verify functionality without hassle.
SMART INTERLINKED ALERTS - Connect multiple alarms so when one detects smoke, all sound—maximizing your household’s safety network.
SLEEK SIMPLE INSTALLATION - Fits existing FireX bases for a quick, electrician-free upgrade—perfect for busy professionals on the go.
TRUSTED SAFETY CERTIFICATION - BSI and CE certified for peace of mind with industry-leading quality and reliability.
UNINTERRUPTED FIRE PROTECTION - 230V mains power with 9V battery backup means your home stays protected even during power outages.

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 throughout your home. Equipped with a combined test/hush button and LED indicators, it offers easy maintenance and nuisance alarm silencing. Certified by BSI and CE, this reliable device ensures professional-grade fire safety with quick, plug-and-play installation.

Specifications

ASIN	B01B67P0KA
Alarm	Visual
Best Sellers Rank	17,234 in DIY & Tools ( See Top 100 in DIY & Tools ) 66 in Smoke Alarms
Brand	iXium
Colour	White
Country of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (440)
Item Dimensions D x W x H	5.5D x 13.5W x 13.5H centimetres
Item Weight	0.32 Kilograms
Manufacturer	iXium
Part Number	5055633354711
Power source	Battery Powered
Product Style	Classic
Sensor Type	ionisation,optical
Unit Count	1.0 count

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