Eberspacher Hydronic S3 D5
The Eberspächer Hydronic S3 D5 is a premium 5kW diesel liquid heater, representing the pinnacle of compact hydronic heating technology.[…]
Read moreFor the year-round cruiser or live-aboard, a high-performance diesel heating system is the most critical component for on-board comfort and vessel preservation. By utilizing the boat’s primary fuel supply, these systems provide a safe, high-output alternative to LPG or solid fuel. Whether you require a forced-air system for rapid cabin warming or a hydronic “wet” system for domestic-style central heating and hot water, selecting an appropriately scaled marine heating solution is essential for maintaining a dry, condensation-free environment in the British climate.
Diesel heating technology has advanced significantly, requiring more than just basic mechanical knowledge for a successful installation. Our approach focuses on technical efficiency and precision, ensuring your system is optimised for the specific volume and insulation properties of your vessel.
We support the industry’s leading diesel heating brands, ensuring your hardware is matched to your lifestyle and vessel type:

Wallas: Features specialised laminar burning technology. This provides a silent, non-atomising process perfect for sleeping quarters.

Eberspächer: High-performance German engineering known for the Hydronic series. Excellent for precise climate control.

Webasto: The industry standard for reliability. Offers both Air Top and Thermo Pro (wet) systems with advanced digital integration.

Autoterm: Highly robust and service-friendly heaters. Ideal for live-aboards requiring heavy-duty performance and modularity.
See all our diesel heaters in no particular order below. This is a collection of compatible models across our range; for more detailed listings and technical specifications, please follow the main menu to our manufacturer-specific pages.
Compliance with the Boat Safety Scheme (BSS) is non-negotiable for any diesel installation. This includes the use of fire-resistant fuel lines and specific exhaust terminations to prevent the accumulation of Carbon Monoxide within the cockpit or cabin areas. All our installations are designed to meet Canal & River Trust (CRT) licensing requirements and international standards such as BS 8511.
We strongly advocate for all diesel systems to be commissioned by an OFTEC-registered technician. This ensures the fuel-to-air ratio is calibrated using a flue gas analyser, protecting your warranty and ensuring the heater runs cleanly without “smoking out” your neighbours in the marina.

The Eberspächer Hydronic S3 D5 is a premium 5kW diesel liquid heater, representing the pinnacle of compact hydronic heating technology.[…]
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The Wallas Viking room-sealed boat diesel heater is a top-tier heating appliance designed for optimal performance in diverse maritime environments.[…]
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The Wallas Spartan is a state-of-the-art, room-sealed twin-outlet diesel heater that offers advanced climate control for modern vessels. Engineered for[…]
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