We are seeing an increase in Diesel heaters being installed in van conversions. It is critical these are installed correctly with Focus on the sealed flue and air intake positioning.

• The Flue: The exhaust must be sealed and vented entirely outside the vehicle. A tiny leak in the internal exhaust pipe can fill the living area with CO while you sleep.
• Mounting: Ensure the unit is mounted on a heat-resistant plate to prevent floor materials from scorching.

3. Ventilation is Non-Negotiable

Many make the mistake of “over-insulating” and blocking vents to stay warm.

• Fixed Ventilation: Floor vents and roof lights are designed to circulate air. Never cover them.
• Combustion Air: The heater needs fresh air to burn fuel properly; if it’s starved, it produces significantly more CO.

4. The Lifesaver: CO Detectors

• Correct Type: Use an audible alarm powered by a sealed-for-life lithium battery (certified to EN 50291).
• Placement: Mount it at head height when sleeping, but not directly next to the heater (to avoid false positives).
• Testing: Regularly press the “test” button before every trip.

5. Why Professional Servicing Matters

DIY is great for furniture, gas and heating systems should be checked by a professional (like DLC Servicing). An annual Gas Safety test or a heater inspection ensures everything is airtight and burning clean.