While the appeal of a warm cabin is universal, the process of a diesel heater installation is a complex engineering task. Dealing with combustible fuel, high-temperature exhausts, and 12V electrical integration requires a professional touch to ensure your vessel remains both safe and insurable.
As OFTEC-certified marine engineers, we specialise in high-quality installations that meet and exceed the rigorous standards of the Boat Safety Scheme (BSS).
Why Professional Installation is Essential
Installing a marine diesel heater is not a DIY task. An improper fitting introduces several critical risks to your vessel and crew:
- Carbon Monoxide (CO) Safety: A leak in the exhaust system can allow odourless, deadly CO gas into your living space. We ensure every joint is 100% gas-tight.
- Fire Prevention: Incorrectly fused wiring or undersized cables are major fire hazards. We use only high-specification marine electrical components and vibration-resistant fittings.
Our Installation Standards
Every installation we perform follows a strict safety protocol designed for the harsh marine environment:
- System Placement: We identify the optimal location for heat distribution while ensuring the unit is mounted on a secure, vibration-dampened platform.
- Exhaust Engineering: We utilise high-temperature lagging and marine-grade skin fittings to manage the 300°C+ exhaust gases safely.
- Fuel Integration: We establish a safe, leak-proof supply from your tank using only specified marine-grade diesel appliances and fittings.

Choosing the Right System
Matching the heater’s power output (kW) to your boat’s volume is critical to prevent “coking” or carbon buildup.
| Heater Model | Power Output | Best For |
| Webasto Air Top 2000 STC | 2kW | Small Cruisers (Up to 40ft) |
| Autoterm Air 4D | 4kW | Mid-Sized Narrowboats (40-60ft) |
| Webasto Air Top Evo 55 | 5.5kW | Large Widebeams & Liveaboards |
Get a Technical Quote
Ready to transform your boat with a safe, professionally installed heating system? Our team is available for installations across the UK canal network.





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