The Importance of Carbon Monoxide Detectors in Winter
As winter grips the UK, our heating systems work overtime to keep our homes warm and cosy. But with the added reliance on boilers and other fuel-burning appliances comes an increased risk of carbon monoxide (CO) exposure. Often called the “silent killer,” carbon monoxide is a colourless, odourless, and tasteless gas that’s impossible to detect without the proper equipment. To protect your family, having a reliable carbon monoxide detector installed in your home is essential—especially during the colder months when heating systems are used most.
This guide explains why carbon monoxide is dangerous, why winter is a high-risk period, how to choose the right detector, and how GH Heating can help you keep your home safe.
Why Is Carbon Monoxide Dangerous?
Carbon monoxide is produced when fuels like gas, oil, wood, and coal don’t burn completely. Faulty boilers, blocked flues, or damaged appliances can release this gas into your home. Carbon monoxide poisoning can cause symptoms such as:
- Headaches
- Dizziness
- Nausea or vomiting
- Confusion
- Shortness of breath
Prolonged exposure can lead to loss of consciousness or even death. What makes carbon monoxide so dangerous is its stealth—it’s undetectable by human senses, making a working detector your first line of defence.

Why Is Winter a High-Risk Period?
Winter poses unique risks for carbon monoxide leaks due to several factors:
- Increased Usage of Heating Systems: Boilers and fireplaces are used far more frequently during colder months, increasing wear and tear on appliances.
- Sealed Homes: To retain heat, windows and doors are kept shut, reducing ventilation and increasing the risk of CO build-up in case of a leak.
- Blocked Vents or Flues: Snow, ice, or debris can obstruct boiler flues and ventilation systems, preventing carbon monoxide from escaping outdoors.
Choosing the Right Carbon Monoxide Detector
Not all CO detectors are created equal. Here’s what to look for when selecting the right one for your home:
- Type of Detector:
- Battery-Powered: Portable and easy to install. Ensure you check and replace batteries regularly.
- Hardwired with Battery Backup: Installed by an electrician and connected to your home’s electrical system, with a battery backup in case of power cuts.
- Certifications: Look for detectors that meet British or European safety standards, such as EN 50291-1:2018, which ensures they are tested for accuracy and reliability.
- Digital Display: Some models have a digital screen that shows real-time CO levels, helping you detect rising levels before they become dangerous.
- Alarm Sound: Ensure the detector has a loud, distinctive alarm that can wake you at night. Check the decibel rating and test the alarm after installation.
- Placement Recommendations: Choose detectors designed for specific areas of the home, such as bedrooms or near boilers.
- Smart Features: High-end models can connect to your smartphone, sending alerts if CO levels rise while you’re away.
Where to Place Carbon Monoxide Detectors
For maximum protection, install detectors in the following locations:
- Near Bedrooms: To ensure the alarm wakes you during the night.
- Close to Appliances: Place one near your boiler, gas fire, or any fuel-burning appliance.
- At Head Height: Follow manufacturer instructions, as detectors can vary in placement requirements depending on whether they’re designed for wall or ceiling mounting.
- One Per Floor: For comprehensive coverage, place a detector on each level of your home.
How to Maintain Carbon Monoxide Detectors
- Test Regularly: Press the test button every month to ensure it’s working.
- Replace Batteries: For battery-operated detectors, replace the batteries annually or when the low-battery alert sounds.
- Replace Old Detectors: Most CO detectors need to be replaced every 5–7 years, depending on the manufacturer.

Prevent Carbon Monoxide Leaks with Boiler Servicing and Upgrades
The best defence against carbon monoxide is ensuring your boiler and heating system are in excellent condition. Here’s how:
- Book Regular Boiler Servicing:
A professional service checks your boiler for faults, ensures proper ventilation, and cleans key components. It’s an essential step in preventing CO leaks and keeping your system efficient. - Upgrade to a Modern Boiler:
If your boiler is over 10 years old or inefficient, consider installing a new one. Modern boilers are safer and come equipped with advanced features to reduce the risk of carbon monoxide leaks. They are also more energy-efficient, saving you money on heating bills. - Check Flues and Vents:
Ensure your boiler’s flues and vents are clear of obstructions like snow, ice, or debris. A blocked flue can lead to CO being trapped inside your home.
Let GH Heating Help You Stay Safe This Winter
At GH Heating, we understand how important it is to keep your family safe and warm during winter. Our team of Gas Safe engineers is here to provide expert advice and services, including:
- Boiler servicing to keep your system running efficiently and safely.
- New boiler installations for a modern, energy-efficient heating solution.
- Flue and ventilation checks to ensure your home is protected from carbon monoxide leaks.
- Advice on the best carbon monoxide detectors for your home and professional guidance on installation.
If you’re unsure whether your boiler or heating system is in top condition, don’t take the risk. Call GH Heating Services today to book your boiler service or schedule a free consultation about upgrading your system.
Your family’s safety and comfort are our top priorities—let us help you stay cosy and safe this winter!