---
product_id: 410860802
title: "Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up"
brand: "kidde"
price: "45635 Ft"
currency: HUF
in_stock: true
reviews_count: 5
category: "Kidde"
url: https://www.desertcart.hu/products/410860802-kidde-firex-kf20-optical-smoke-alarm-mains-operated-with-battery
store_origin: HU
region: Hungary
---

# Battery backup included Interlink up to 23 alarms Tamper-resistant locking Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up

**Brand:** kidde
**Price:** 45635 Ft
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of danger with Kidde KF20 — your home's silent guardian! 🏠

## Quick Answers

- **What is this?** Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up by kidde
- **How much does it cost?** 45635 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/410860802-kidde-firex-kf20-optical-smoke-alarm-mains-operated-with-battery)

## Best For

- kidde enthusiasts

## Why This Product

- Trusted kidde brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Tamper-resistant locking device for secure, tamper-proof installation
- • **Smart Silence Control:** Combined test/hush button for quick nuisance alarm management
- • **Certified Peace of Mind:** BSi Kitemark certified, compliant with latest building regulations
- • **Seamless Safety Network:** Link up to 23 alarms for whole-home protection
- • **Uninterrupted Vigilance:** Mains powered with battery backup ensures 24/7 reliability

## Overview

The Kidde Firex KF20 is a mains-operated optical smoke alarm with a 9V battery backup, designed to detect slow smouldering fires while minimizing false alarms. It supports interlinking up to 23 units, features a combined test/hush button, and includes a tamper-resistant locking device. Certified to BSi Kitemark standards and compliant with current building regulations, it offers reliable, professional-grade fire safety for modern homes.

## Description

Product Description Kidde Firex smoke alarms offer the very best in quality and reliability. Certified to the highest BSi Kitemark standards and offering a wide range of alarms to suit most applications you can be assured that you are in safe hands. The KF20 is compliant with the latest in building regulations for new housing. The KF20 utilises photo-electric (optical) detection facility. They are best suited where there is a danger of slow smouldering fires such as those caused by cigarettes for example on foam filled furniture or bedding. They are less prone to nuisance alarms caused by steam or cooking particles. They can be disposed of with general household waste. Set Contains: 1 x KF2, Battery & Instructions

Review: Je souhaite garder le produit donc vous pouvez ŕedebiter le montant de son prix
Review: Die Kontrollleuchte leuchtet zu stark. Aber sonst TOP. Die Haltbarkeit bleibt abzuwarten. Keine Anleitung in deutscher Sprache .

## Features

- Interlink with up to 23 Firex hard-wired alarms
- Combined test/hush button
- Auto reset
- Tamper-resistant locking device
- Mains operation
- The Kidde KF2 smoke alarm is a mains powered alarm contains battery in it as a backup in case of a power cut.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B006J56XQU |
| ASIN  | B006J56XQU |
| Batteries | 1 9V batteries required. (included) |
| Batteries  | 1 9V batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #122,562 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #148 in Smoke Alarms |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,449) |
| Customer reviews | 4.6 4.6 out of 5 stars (1,449) |
| Date First Available | 9 August 2012 |
| Date First Available  | 9 August 2012 |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 280 g |
| Item model number | KF2 |
| Item model number  | KF2 |
| Manufacturer | Kidde |
| Manufacturer  | Kidde |
| Part number | KF2 |
| Power source type | Battery Powered |
| Product Dimensions | 13.3 x 13.3 x 3.9 cm; 280 g |
| Product Dimensions  | 13.3 x 13.3 x 3.9 cm; 280 g |
| Style | Back Up |

## Product Details

- **Brand:** Kidde
- **Colour:** White
- **Item weight:** 280 Grams
- **Power source:** Battery Powered
- **Style:** Back Up

## Images

![Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up - Image 1](https://m.media-amazon.com/images/I/515CCoZk4qL.jpg)

## Customer Reviews

### ⭐⭐⭐ Review
*by E***S on 25 December 2020*

Je souhaite garder le produit donc vous pouvez ŕedebiter le montant de son prix

### ⭐⭐⭐⭐⭐ Review
*by T***M on 27 January 2020*

Die Kontrollleuchte leuchtet zu stark. Aber sonst TOP. Die Haltbarkeit bleibt abzuwarten. Keine Anleitung in deutscher Sprache .

### ⭐⭐⭐⭐⭐ Review
*by U***K on 28 January 2026*

Firs,t you need to check the regulations for your area. These directly exchange for for the older models if you have them (screw into existing baseplate) but would also not be too difficult to fit as new items - again, though, check if you can do this or whether you need a registered electrician,

## Frequently Bought Together

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- Firex KF30 Kidde Firex Alarm, White

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**Shop now:** [https://www.desertcart.hu/products/410860802-kidde-firex-kf20-optical-smoke-alarm-mains-operated-with-battery](https://www.desertcart.hu/products/410860802-kidde-firex-kf20-optical-smoke-alarm-mains-operated-with-battery)

---

*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-18*