FA6813 carbon monoxide detector on wooden surface with blurred kitchen background.
FA6813 cream armchair with cushion, blanket, table, books, and a plug adaptor nearby.
FA6813, box, and batteries on a wooden cupboard beside a small potted plant.
Infographic: Four steps to activate and test FA6813 by inserting batteries and pressing buttons.
FA6813 guide shows shelf and wall mounting steps with labelled diagrams and instructions.
An FA6813 sits on a white cupboard next to a potted plant indoors.
Which? Best Buy August 2025 badge for CO alarm on green background.

FA6813-EUX10

Carbon Monoxide Alarm, Replaceable Batteries

CO 3 Year Warranty Battery included

Product description

With electrochemical sensing technology and a clear loud alarm, the FA6813 provides trusted carbon monoxide (CO) detection for your home.
The alarm comes with 2 x AA batteries that can be replaced once you hear the low battery chirp to keep you protected. For a decade of protection look for our range for FireAngel Pro Connected alarms.

Enjoy a peaceful night’s sleep. Give yourself vital time to replace your alarm, by silencing low battery warnings for 8 hours.

Alarm memory indicates previous activation: With the alarm memory function, a red LED will flash to let you know with a visual indication that there has been a previous CO alarm activation within the last 30 days.

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Price range: £20.00 through £36.00

PRODUCT SUPPORT

With electrochemical sensing technology and a clear loud alarm, the FA6813 provides trusted carbon monoxide (CO) detection for your home.
The alarm comes with 2 x AA batteries that can be replaced once you hear the low battery chirp to keep you protected. For a decade of protection look for our range for FireAngel Pro Connected alarms.

Installation & setup

Get the help and support you need to easily set up and install your FireAngel alarm for instant protection.

Installation guide

Installation guide

Click the icon to find out more about installing your pro connected app

Product maintenance

Product maintenance

Click the icon to find out how to maintain and test your products

Resources

To ensure you install the right alarm for your home, and one that's compliant with your local fire regulations, review our manual and data sheet or get in touch with our customer service team.

Product manual

Product manual

Click the icon to download the product manual

Datasheet

Datasheet

Click the icon to download the product datasheet

Related FAQs

Yes – this Carbon Monoxide Alarm is EN 50291-2 certified and IP44 splash resistant, suitable for all domestic settings, including caravan holiday homes, caravans, motor caravans, and boats.

Yes – the FireAngel Pro Connected FP1820W2-R Carbon Monoxide Alarm, when paired with a Smart Gateway, will allow you to review alerts and easily test the alarm from your phone.

Carbon Monoxide is produced when fuels burn incompletely – this could be from a boiler, gas fire, oven, log burner or a blocked flue or chimney. It can also travel through walls from adjoining properties, so as well as having an alarm next to appliances in your property we would also advise you to have one in living spaces and bedrooms. To help prevent a Carbon Monoxide leak we advise getting your appliances regularly serviced by reputable engineers who are gas safety registered.

See the installation instructions in the product box or product page for installation instructions.

When a Carbon Monoxide alarm is triggered, it will emit an alarm sound consisting of 4 loud beeps and a break repeated until the sensor is clear of Carbon Monoxide gas.

Yes – Our FP1820W2-R, FA3820X4 and FA3322X4 products have sealed for life batteries and will protect your home, without you need to replace the batteries every year.

See all faqs

Upgrade your protection

Our FA3322 Digital CO Alarm is Which? recommended and trusted to protect you and your loved ones from carbon monoxide.

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Reviews from our customers

Five stars review

“Good value, easy to activate, in a kids room above a boiler so I feel reassured that it's keeping us safe.”

Amazon Customer, Originally posted on amazon.com

Five stars review

“Small and neat compact detectors that you can fix to the ceiling, wall or freestanding and includes batteries. Great value.”

Amazon Customer, Originally posted on amazon.com

Five stars review

“Great brand, brilliant that you can replace the batteries.”

Amazon Customer, Originally posted on amazon.com

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Got a burning question? Get in touch

If you can't find what your looking for on our blogs and looking for further guidance and advice, our UK-based Customer Support team are on hand all week from 8:30am until 5:30pm, they can answer any further queries you may have on our products, solutions or services.