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☠️ Carbon Monoxide Poisoning: Symptoms & Prevention Tips
How to Stay Safe from the Silent Killer in Your Home
Carbon monoxide (CO) is an odourless, invisible, and deadly gas — often referred to as the silent killer. It can leak from faulty gas appliances and boilers, putting you and your family at serious risk.
In this post, we’ll cover:
- What carbon monoxide is
- The most common symptoms of CO poisoning
- How to prevent it in your home
- What to do in an emergency
💨 What Is Carbon Monoxide?
Carbon monoxide is a poisonous gas produced when fuel doesn’t burn properly. It’s created by:
- Gas boilers
- Gas fires
- Cookers and ovens
- Open fires and wood burners
- Petrol or diesel engines (e.g. in garages)
Because CO has no smell, taste, or colour, it’s impossible to detect without an alarm. Even small amounts can cause serious health issues — or worse.

⚠️ Symptoms of Carbon Monoxide Poisoning
The signs of CO poisoning can easily be mistaken for other illnesses like the flu or food poisoning. Here's what to watch for:
🚨 Early symptoms:
- Headaches
- Dizziness
- Nausea or vomiting
- Fatigue
- Shortness of breath
- Confusion or difficulty concentrating
❗ Serious exposure can cause:
- Chest pain
- Blurred vision
- Loss of consciousness
- Seizures
- Death
If multiple people (or pets) in your home are experiencing similar symptoms, especially when indoors — suspect carbon monoxide.

🐾 Signs in Pets
Animals are often affected before humans. If your pet suddenly becomes ill, lethargic, or collapses without warning, this could be a sign of CO in the home.
🛑 What to Do If You Suspect Carbon Monoxide Poisoning
- Turn off all appliances (if safe to do so)
- Open doors and windows to ventilate
- Leave the property immediately
- Call the Gas Emergency Number: 0800 111 999 (UK)
- Seek medical attention — even if you feel better
Do not go back inside until it’s confirmed safe by a professional.
🔒 How to Prevent Carbon Monoxide in Your Home
✅ 1. Install a Carbon Monoxide Alarm
- Place it near your boiler or any gas appliance
- Choose an audible, battery-powered unit with a BS EN 50291 certification
- Test the alarm monthly and replace batteries regularly
Tip: CO alarms are not a substitute for regular servicing!
✅ 2. Get Your Boiler and Appliances Serviced Annually
- Only use a Gas Safe registered engineer
- Ensure your gas boiler, fire, cooker, and flue are checked
- Ask for a Gas Safety Record (CP12) if you're a landlord or tenant

✅ 3. Know the Signs of a Faulty Appliance
- Sooty stains around the appliance
- Yellow or orange flames (instead of blue)
- Condensation in the room
- Pilot light that keeps going out
✅ 4. Never Block Air Vents or Flues
- Keep vents unblocked for proper ventilation
- Ensure your boiler’s flue isn't obstructed outdoors (especially in winter)
✅ 5. Don’t Use Outdoor Equipment Indoors
- Never use BBQs, generators, or portable heaters inside a house or garage
- Avoid leaving car engines running in enclosed spaces
👨👩👧👦 Carbon Monoxide Safety for Families
- Install CO alarms in every room with a fuel-burning appliance
- Educate children on what the alarm sounds like
- Ensure everyone knows your emergency action plan
🏁 Final Thoughts
Carbon monoxide poisoning is preventable. The key is regular servicing, installing alarms, and staying alert to the warning signs. Taking a few simple precautions can protect your health — and even save lives.
📞 Need a Carbon Monoxide Alarm or Boiler Safety Check?
At Gas-Go Heating, we offer:
- Carbon monoxide alarm installation
- Annual boiler servicing
- Gas appliance safety inspections
- CP12 certificates for landlords
📆 Book your gas safety check today and protect your home from hidden dangers.
.....Call us on 02393 782351