The Webasto Thermo Top Evo is a powerful and compact diesel liquid heater (boiler) specifically designed for marine applications. Delivering a maximum heat output of 5 kW, it is the ideal solution for vessels up to 50 feet, providing both efficient cabin heating and domestic hot water.
Webasto Thermo Top Evo: Efficient Hydronic Heating
Unlike air heaters, the Thermo Top Evo heats a water/glycol mixture that is circulated through a “wet” system. This allow for a versatile installation that can include radiators, towel rails, and SureCal calorifiers for hot water. Its compact footprint, low-noise operation, and energy-efficient performance make it a preferred choice for cruisers and narrowboats alike.
The system is highly customisable, with optional upgrades such as the Webasto MultiControl Timer, room thermostats, or the ThermoConnect TCON 2 for smartphone-based remote control.
Expert Installation and BSS Safety
Our OFTEC-trained engineers specialise in Webasto Thermo Top Evo installations, ensuring all fuel, exhaust, and plumbing connections meet the highest marine safety standards. Professional installation is critical for ensuring clean combustion and long-term reliability. For full Boat Safety Scheme (BSS) compliance, we use marine-grade exhaust systems and insulated hull fittings.
Technical documentation is available via the Webasto Corporate Technical Portal, and general guidance can be found in the OFTEC consumer guide for liquid fuel heating
Webasto Thermo Top Evo Boat Diesel Heater Kit Includes:
| Webasto Thermo Top Evo 5 kW Liquid Diesel Heater – 12 Volt |
| Circulation Pump |
| Fuel Pump |
| Webasto Controller with Timer |
| Fuel Pick-up Pipe |
| Electrical harness c/w fuse holders and fuses |
| 1m Exhaust Pipe |
Optional extras:
Diesel Appliance Safety Certificate
Webasto Multi Control Timer
Webasto Room Thermostat
Webasto ThermoConnect TCON 2
2m Marine Exhaust Pipe
24mm Exhaust Skin Fitting / Hull Fitting
Marine Fuel Filter With Stop Tap
Header Tank For Diesel Heater
Stainless Steel Coil Calorifier – Boat Hot Water Tank – Various Sizes
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