The Honeywell Home R200C-1 is a stand-alone carbon monoxide (CO) alarm built for straightforward, no-fuss protection in any room containing a fuel-burning appliance. Powered by a sealed 10-year lithium battery with a matching 10-year electrochemical CO sensor, the unit is entirely maintenance-free for a decade — no battery changes, no sensor swaps. Its super-slim 25 mm depth makes it one of the most discreet CO alarms on the market, and the entire front face serves as a large, easy-to-press test/silence button. A bright red flashing "ALARM" text display, rated 85 dB sounder, auto-dimming green power LED, IP44-rated housing, and 48-hour alarm memory round out a feature set that comfortably satisfies landlord compliance requirements and the 2022 UK CO alarm regulations.
10
Year battery & sensor life
ℹ CO Alarm Regulations 2022: UK law requires CO alarms to be fitted in rooms containing a fixed combustion appliance (boiler, gas fire, log burner, etc.). The R200C-1 is BSI Kitemarked to BS EN 50291-1 and meets the 2022 England, Scotland, and Wales legislation requirements for CO alarm installation.
⚠ Carbon Monoxide is Invisible and Odourless: CO cannot be seen, smelled, or tasted. Symptoms of exposure include headaches, nausea, and dizziness — and at high concentrations it is fatal. Do not rely on physical symptoms alone. If this alarm sounds and you have not pressed the test button, evacuate the premises immediately and call the Gas Emergency number: 0800 111 999.
⚠ Placement Guidance: Install in every room containing a fuel-burning appliance and in any room where occupants spend significant time (bedroom, living room). If a partition divides the room, position the alarm on the same side as the potential CO source. CO is slightly lighter than air — mount at head height or above, ideally on the ceiling or high on a wall.
Key Features
10-Year Sealed Lithium Battery
A permanently sealed, non-replaceable lithium battery powers the alarm for its full 10-year service life. A dedicated low-power chip conserves energy in standby mode to ensure the battery lasts the rated lifespan without any maintenance. An end-of-life signal alerts you when the unit needs replacing.
10-Year Electrochemical CO Sensor
The electrochemical CO sensor is rated for the same 10-year service life as the battery, meaning no mid-life sensor replacement is required. Detection accuracy is maintained throughout the unit's lifespan, and the sensor responds appropriately at the threshold concentrations defined by BS EN 50291-1.
Visual ALARM Display & 85 dB Sounder
When CO is detected, a bright red "ALARM" text flashes on the front face alongside the 85 dB sounder, providing both visual and audible alerts. The visual indicator makes this alarm particularly suitable for households with hard-of-hearing occupants. The green power LED automatically dims at night to avoid disturbing sleep.
48-Hour Alarm Memory
The alarm memory stores alert status for 48 hours, so you can check whether CO was detected while you were out or asleep. This feature is especially valuable in rental properties and second homes where occupancy is intermittent, providing evidence of a CO event even after the alarm has reset.
IP44 Rating — Splash & Dust Proof
An IP44 ingress protection rating makes the R200C-1 resistant to dust intrusion and water splashes from any direction. This means it can be safely installed in bathrooms, conservatories, utility rooms, and other damp-prone areas — an advantage over many basic CO alarms with no IP rating.
Super-Slim Design — Only 25 mm Deep
At just 25 mm depth, the R200C-1 is among the slimmest domestic CO alarms available. The entire front surface acts as a test/silence button, removing the need for a small recessed button and making weekly testing straightforward. The tamper-proof design also meets landlord compliance requirements under current legislation.
Technical Specifications
| Model |
R200C-1 |
| Alarm Type |
Stand-Alone Carbon Monoxide (CO) Alarm |
| Sensor Technology |
Electrochemical CO sensor |
| Sensor Life |
10 years |
| Power Source |
Sealed 10-year lithium battery (non-replaceable) |
| Alarm Sound Level |
85 dB minimum |
| Interconnect |
Stand-alone (no interlink) |
| Depth |
25 mm |
| Ingress Protection |
IP44 |
| Alarm Memory |
48 hours |
| Fault Silence Duration |
Up to 9 hours |
| Visual Alert |
Flashing red "ALARM" text display |
| Power Indicator |
Auto-dimming green LED |
| Warranty |
10 years (manufacturer) |
| Certifications / Standards |
CE, UKCA, BSI Kitemark, BS EN 50291-1 |
| Legislation Compliance |
2022 England, Scotland & Wales CO alarm home legislation |
| Mounting |
Wall or ceiling mount |
| Colour |
White |
Frequently Asked Questions
Where should I install a CO alarm in my home?
Install a CO alarm in every room containing a fixed combustion appliance — boilers, gas fires, log burners, and similar. Also fit one in bedrooms or rooms where occupants spend significant time, since CO poisoning often occurs during sleep. Ideally, mount at head height or above on a ceiling or high wall. Avoid placing near open windows, draughts, or directly above an appliance.
Does the R200C-1 need a battery change during its 10-year life?
No. The R200C-1 has a permanently sealed, non-replaceable lithium battery designed to power the alarm for the full 10-year service life. At end of life, the unit emits a distinct warning signal indicating the entire alarm must be replaced — there is no battery compartment or sensor to service. This makes the alarm fully compliant with landlord requirements for low-maintenance, tamper-proof CO detection.
What should I do if the R200C-1 alarm sounds?
If the alarm activates and you have not pressed the test button: do not ignore it. Immediately move all occupants and pets to fresh air outside the property. Do not re-enter the building. Call the National Gas Emergency Service on 0800 111 999 (24 hours). Only return once the property has been ventilated and checked by a qualified engineer. Do not attempt to locate the CO source yourself.
Can the R200C-1 be installed in a bathroom or damp room?
Yes. The R200C-1 carries an IP44 ingress protection rating, meaning it is sealed against dust ingress and protected against water splashes from all directions. This makes it safe for installation in bathrooms, conservatories, utility rooms, and similar damp or humid environments — a significant advantage over standard CO alarms with no IP rating.
Is the R200C-1 suitable for landlord compliance under UK law?
Yes. The Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 require landlords in England to install a CO alarm in any room with a fixed combustion appliance. The R200C-1's tamper-proof sealed battery, BSI Kitemark certification to BS EN 50291-1, and 10-year service life make it an ideal choice for rental property compliance. Its 48-hour alarm memory also provides a record of any CO event between tenancy inspections.
